"Pseudo-MPEC" for EQUULEUS
Created 2023 Mar 30 16:20:07 UT using Find_Orb
Click here for an explanation of pseudo-MPECs
You can click here to get custom ephemerides for this object from Horizons. There's not a lot of information about this object on-line, but you can click here for some info on EQUULEUS.
This object was first found as a tracklet on 2023 Feb 26 by ATLAS, but (aside from one tracklet later determined to be spurious) there was no follow-up at that time. I wasn't even sure it was an artsat.
It then was found by ATLAS again on March 18 as a 'new' object, and recognized as possibly of interest. I thought we might lose it, but fortunately, Quanzhi Ye found images of it in (I41) ZTF images, which enabled further follow-up.
Eventually, we had enough data to link A10T4rQ = A10TGEB, but the residuals are systematically bad, and the usual non-gravitational models didn't fit, suggesting a maneuvering object rather than one pushed around by solar radiation pressure. Photometry also supported the object being artificial, and I started thinking we might be seeing glints from solar panels.
Scott Tilley and Jonathan McDowell separately suggested that we might be looking at an Artemis-1 cubesat, possibly EQUULEUS. JAXA didn't provide detailed ephemerides, but the overall picture seemed to match the orbit we'd determined, and they gave a particular distance to EQUULEUS on their Tw___er feed that matched this ephemeris.
Jon Giorgini was able to get ephems for the object and put them on Horizons. That cinched the identification.
This artsat would normally be much, much fainter; it can only be this bright because we're getting glints from the solar panels. You'll see odd changes in the brightness below, depending on whether we're getting sunlight beamed at us or not. I assume that the actual magnitude will generally be faint, especially at lower elongations.
The object will go to the Earth-Moon L2 point. I don't know where it will go after the mission ends this summer.
Astrometry:
A10T4rQ* C2023 02 26?a4R*ZPF4vKG80W?2n$#FV.AfDlj31RG=6[m7ojbq\'m\na:q.JYW68
A10T4rQ C2023 02 26)k#y7H2IT4@jo4'?XD6n`qav?HjjVoI_`M9wOK)_AsU/UtAyd5_[W68
A10T4rQ C2023 02 26P6UxE/uoH5vagK3g.Lb'[K6Ul5s[uU110dk/sgXAT]iYJ1gvMIXyW68
A10T4rQ C2023 02 26_gEOa[Jpl5Z0Zi)GH%$Vbmj2X1b,Z@+t.*IIeM?2yBvBxj+!GIk3W68
A10T4rQ C2023 02 26(uh7pMeXWh'woF/1y+aAe_fJ;gqe2^G445%*bjAstrometrybsXiW68
A10T4rQ C2023 02 26pMiY8h?T/*mOU/NNeO=ydB]gySyh$'1]syredacted;VMbaAl*.vW68
A10TGEB C2023 03 16X7a-.:KPQ+qP^qrR)K\0yyq@kg$Sd\j%CxtH)K-TVEKNb#2)HL(GF52
A10TGEB C2023 03 16DleF)j/9C]a.HZm`m/=YKF'RN)v*u;0uE@T?ckZCy(#rP=?_[xe'F52
A10TGEB* C2023 03 18%=0bm:^.%3S+SaKpR+m,hq$hCWIuB+T_;=R/U;4hntv0EFb*:HLeW68
A10TGEB C2023 03 18DS##xDbS^#pjfK+UmOidt6X*O+o/)H3+%1*ghDhX1mfa;*(itb!$W68
A10TGEB C2023 03 187`sGjB4uGE%iG3,Zxxd;pYERHt:$R,dLSTHA*Ifc8^ekE$EwC`m_W68
A10TGEB C2023 03 18y%Y9)2yG8,:M`=:I0R46C3:h0]NW:hV?GJ3II%V%s)e7wiGPW7MkW68
A10TGEB C2023 03 18.28786211 02 52.349+08 37 49.20 ~3J37 20.07gUNEOCPI41
A10TGEB C2023 03 18.28833511 02 52.227+08 37 46.02 ~3J37 20.49gUNEOCPI41
A10TGEB KC2023 03 18.83231511 09 45.850+07 24 43.20 ~3JDt 20.2 GVNEOCPJ95
A10TGEB KC2023 03 18.83437911 09 46.202+07 24 31.64 ~3JDt 20.4 GVNEOCPJ95
A10TGEB KC2023 03 19+UCD3]2CV4mX!q[['aT0EboFlM]?ri5Mf4`I*YhQ7jr%)33n:YVcH36
A10TGEB KC2023 03 19Y6=u.`16LyvOyZ.hfy2hK7r9$fS]v=x-4soN^+T]\)]k%\DkKo(CH36
A10TGEB KC2023 03 19.15136011 13 07.871+07 03 01.30 ~3JDt 19.40GVNEOCPI52
A10TGEB KC2023 03 19.15228811 13 07.795+07 02 57.05 ~3JDt 19.66GVNEOCPI52
A10TGEB C2023 03 19.15241 11 13 07.68 +07 02 58.3 ~3L1P 19.5 GVNEOCP703
A10TGEB KC2023 03 19.15321611 13 07.799+07 02 52.58 ~3JDt 19.80GVNEOCPI52
A10TGEB C2023 03 19.15359 11 13 07.58 +07 02 51.7 ~3L1P 20.1 GVNEOCP703
A10TGEB KC2023 03 19.15414311 13 07.784+07 02 48.44 ~3JDt 19.41GVNEOCPI52
A10TGEB KC2023 03 19b`c;x_2o7?)041Ite,VHCr9HU79Z`uWI\@dZYvOpo2Z^C)X.jhV3H36
A10TGEB C2023 03 19.15596 11 13 07.43 +07 02 39.0 ~3L1P 21.4 GVNEOCP703
A10TGEB 1C2023 03 19`I6o`))F%`o;Z4OmdX=4jxrg[*OKr+92.O\HXen7R`R[Tp9K*)IVQ62
A10TGEB 1C2023 03 19J_`yd2*#ylR[:ec[/AgjO]*hg$D8c_7Mqv+ph]+]`F%@'hanXj+EQ62
A10TGEB 1C2023 03 19s*#rB@13G\/R-Rj85lR5Ksp9ZL%Ih$wr'In!Z(HpkU#CEp2kH!qAQ62
A10TGEB KC2023 03 19q0Vi\59%mjwN9FOMNwCs,!q+K)ws_noVX%o:9t-)K[vqdIE;F?HGJ57
A10TGEB KC2023 03 196Srs*FXx;i1@i4\Tu?%0;wtdv50o]2_k^Yu*kNy4_sW?-9s\XRlsJ57
A10TGEB KC2023 03 19Of7LVAmh'^L:4W_bVtGP+@7EmtWE@+OaB!=xvdfW#9K7J1y_0j@HJ57
A10TGEB KC2023 03 19igvG2pRaWNNM9mmJp,P-V;,7T,GDIhmy5YpAA'o]0vP#jUsP+aFf958
A10TGEB KC2023 03 19xLyxR#@yUXLPy.7vAu@vHq[NX[nV5@/hr2.Ki)on]#ntuEoJelr\958
A10TGEB KC2023 03 19'n=n$R44@`F)1iGo_oRb8cubNA[eI[YfP^rLm%Lvjw_!l7=0=UM9958
A10TGEB KC2023 03 20ZSA]4T#lv]ik?,-F..]KsU[FHS(,C@tRCmDs*cbFT[,;wRI`jNYE204
A10TGEB KC2023 03 20c%m\OYoQ1mDVfNs)NMd4BbgEHWs[V7`#-vR0VagI_w5gpr;w]O?y204
A10TGEB C2023 03 20pd!'8\7Ov:\sGF)IaprFna3Z(q2[J\FK^aUg7pI0=pm@Wd8X2SEP511
A10TGEB C2023 03 203(l^n(.PNYnf@$SXtVBk6e8T#p@0opDw=(kE7vMJD9EHFWvSA)C,511
A10TGEB C2023 03 20Awckqt`hr^_)^k%1p$$oLJLIYDc#Q*T:uL46n,N-aWk,7VoZKA^Q511
A10TGEB C2023 03 20Dd1iNht2B4bHIxp/L#J]n1NJgC*9?BD=-U,5CG@o/Bra9'g,%e=S511
A10TGEB KC2023 03 205*QtwpB3#Qt8OT`oIIkAe*#R!cWfe!0Obfl*SI5Mbd\3+%%'jc^w204
A10TGEB C2023 03 20dGTPMs,7i[SU'7/QM697ro%Xt*_?mw2DJbKDn3PpC1-RbZBUL;JQ511
A10TGEB C2023 03 20My[f(cZ:a*#2(KNpUx9g,EO@g_l\/C/.XOLa8`UyE2eM^nC9l6ZR511
A10TGEB C2023 03 20[ds#I?_2cIAARG\kb8D-Jd4b22V$H61^T^a##6@#1bV2D!N6E5;c511
A10TGEB C2023 03 20J#u6YT8JeP$#7\lLGI]c%IaZRxZg9Ckp?'Pst8JXo:u.fv1#97'!511
A10TGEB C2023 03 20qYSQFFOlHMFuG3rY\4s1v:.-=!xxJW/UXU*JrRwrMys:qRv_%.5?511
A10TGEB C2023 03 20pv7qO5NyG].Ymm)?yZ7'Y0u*rCBZ2;*/,U^v]7wuyVhl_alsxsSc511
A10TGEB C2023 03 20n7%@[!Tmq8V#HnS+_P_,HQE/w?bJLKs=*9x,HF#`VZbK4n0dNIqQ511
A10TGEB C2023 03 20!:R5#;'vY2iWrkWu,hUn9Cb#.kMYB(O6Ze97Zt39`WKXH(-Tp=#c511
A10TGEB C2023 03 20`?AH0H',PWCdv6V0ipqu)##71N.4knTf=4xK/n)+^_n(f?]a#`nq511
A10TGEB C2023 03 20F,lJ:XgXm@]1O+n5i-+8jq1M24gP(^Q^DC/8!PqnpTZF`(5)6@Ak511
A10TGEB C2023 03 20S-#At-$2^bW'qo]H@+O?iHSr^s:dG%ghyOl13/Bol,N27G;We*%?511
A10TGEB C2023 03 20#=lq5Wr:x:mMaX;p!dvmpKYaLur7YwV\nI-]Z%QX@D`'#UwX?M%i511
A10TGEB C2023 03 20R8P$3ImL)IOk,/p8Bj\(K97KV*PE\iOaVRW#-)aV3RBTdGkFr*7O511
A10TGEB C2023 03 20VmY`loOvV`Ngc[K$k^VbYEZ-ERl][*nbQdlM@,Ubo73t\q*Dw=av511
A10TGEB C2023 03 20wHv*nYep=43nxYArewZ4hmb$dmI0dlbfhl[!1+sEgCQ/`PQ(D9,b511
A10TGEB C2023 03 20`/XKs%3:G%u#jZv6Sc3*L)!fZRnXEUt,d-182DRY#'6ma2]nvKyH511
A10TGEB C2023 03 20Tih,]FQlu7W(Ho:F!MI(dqCv.8LYkOhkVQU#(Hxt%ZvNtC)!Fe?=511
A10TGEB KC2023 03 20.pLv_kKM6i*Aya$G9xstTGq7HB[dlaehG0:t!]$B\?F)Xx/QM=xD734
A10TGEB KC2023 03 20.!b0wxui9:W`$K[%/9EY)k!lCNduLrPi)MgXrNAPyV0bI2b\hkNi734
A10TGEB KC2023 03 20]Kq!FDtwgW$T5u4aI/7eGei3MKVryE/Jq1Ko+\bjQ!X8Jh)M-+lv734
A10TGEB KC2023 03 20rsNEUtTE?+:$-P@3@q5xc9@m@(xfXp_Zy^6M9prX!f7bWu6Odhl$104
A10TGEB KC2023 03 20/_Dk71IbJ^a/N4x`4SLK;h)6$2Ul$YUWUB$qmbXVjFXh,FA2r\UL104
A10TGEB KC2023 03 20XA[%y:4=L5Mn9D;UWqEW)gP.PD+1J=R,BQ1ILvAmt\H+.Gc74'Av104
A10TGEB 0C2023 03 20WC@TjZ`PlQg;WgkRZei\qw)44=;09LS3ibXI.%n9mcq4TIot8QkiZ31
A10TGEB 0C2023 03 20[%XRthFFuYi]k8:rbmeLyhHZEJ5$\AxJAyEUh]F[wS_nre2qlTtFZ31
A10TGEB 1C2023 03 20itFmcJO^#yx[D['Y2\2rP*]V)qP*:$*-A.\%15_g3clicktfIVE[Z84
A10TGEB 1C2023 03 208X-Bk^rN/2IZV!Kl[6[t$oojK5ScGa+dRC6ZSmmVMc3)4Y%;8)d-Z84
A10TGEB 1C2023 03 20M\Xb5udvZ(($=1edg9MTv4:A)R$G:Q)LmrHWI\_Q`XHKC296`m2VZ84
A10TGEB 0C2023 03 20[LwdYU1s,nEyAG1j^JuD(DpVcpV)L8/#VhXB;6;1)!Swy6uIQ22hZ31
A10TGEB C2023 03 20;NZK,7mY/]I$U[t^6ukgt'bwCn/VpQKx2v*#j#6S:_1ot+-exRTZK63
A10TGEB KC2023 03 20oQWc:gYl9WXi[Ysqf30w(_]i$cgVr!K#Y4FGd9%B)uWn()'8ZcQ=K63
A10TGEB KC2023 03 20RU[sf-u70.NTMlH,4Q'EmOMPVf1?q(KM=E9Jt*[(0c68V^DDij]U104
A10TGEB KC2023 03 20=gf]R_U[1(R0u#*%^2j!(Wa*`Fgpc/\Gauv`^OpYR^jf(ki0#*kYK63
A10TGEB C2023 03 204+%V!he753k#sORDb^x!Ne)s.nvl_hereUZjZ6F#U]l\J^_xgkBPK63
A10TGEB C2023 03 20O@QW_ZPG(M9g\t2=dX@@o2V@J;r8`nB5hslN-Bu6IiW,ci#'!CGKK63
A10TGEB KC2023 03 20/WE4r=LX1nGyAm'N6W_FvEc?HjuEl/IECvo.'=0Z8#b@9?_S?5R\104
A10TGEB KC2023 03 20.!]Fr]Uv(RLD!4KD,0HHQ;AjH`%UBgVHKVu.fK7Q5@ea8dGIfoT[104
A10TGEB C2023 03 21jD*P#_LjoN;%#Jk(;dYP^forykvclyO;S0+Qn5T-;yj:(GMP37cOL01
A10TGEB C2023 03 21b/LKV%Tq3eWdYlsgbLC,f%S_-]rxG6N/50Yi[l.81h_^/G0,SP2`L01
A10TGEB C2023 03 21isDqERE.,yCYgx%ujjcONLP8Y)CEj2hN53[5AA4?8G,6M'Z=EdFqL01
A10TGEB C2023 03 21:8*x5)BH!0Pkwe-n]Ei5CKo:pY:ANSLLh/njeXuVU`6sm*1lT'C%L01
A10TGEB C2023 03 21Q^u0x=8+CdN,Xrqjm'ET=s!*n8O^mk6d)vaHJHZv?Kj!pxCStM!QL01
A10TGEB C2023 03 21@QQ8explanation1i+%J`UebY3BV-m.xaQ!i-,/^]GoL,L+VfaBNL01
A10TGEB C2023 03 21@/JPPJ6(+w4`@AlO%OPNU7T`Gt!CvSMLoE#t[+%2??S:1\?:3Ho$L01
A10TGEB C2023 03 21V/KQ1oS-HZ3q%jE`v$soCLdT.)nu+=ybM%m8tEv[2G`#mGSKtof#L01
A10TGEB C2023 03 21bJL^Ui7qpd.jeS@F@h`C5av`[x/[e3D5_\D(MyDZ-hy;/y[Q`$@GL01
A10TGEB C2023 03 21T]Rjq#`R_DUw$5+l5FU4[`t_v9aYEQQq.H1$pZK8;++*+:fUm%[iL01
A10TGEB C2023 03 21rvqMSB5!T9V$6*OE!4O`(G]n+s7Wo9NwGK2%LX]BIg8xf9foSnqYL01
A10TGEB KC2023 03 21,e%#utp#q=(*@-0Rk,!2DSS]sH6h?IN_gSbMXsyP]JcG.SXAw1t4H21
A10TGEB KC2023 03 21+v$MpMUUn.qd5)]4Y9K)Wr`eK`)4641:;[Apj5Xaynj7\$*.aaZGH21
A10TGEB KC2023 03 21M`egbIS7gmSHi#8$\SX*CIfGSN/o/0voPc1y?d6,2CT!GFY]y7gwH21
A10TGEB C2023 03 21:-xH\a=ErmnH0%!Pj7\[k#\76?kN`hBmfj)NaN.vH?#oF:QHOv%1F51
A10TGEB C2023 03 21h;*YCj!@8g0uoL$oZqytHiJP)*yhwBYxbK@MFiSJ_3%0g[_5^Ni.F51
A10U2hC C2023 03 25.43751311 55 31.747-01 03 53.21 .50 18.29oV! T05
A10U2hC C2023 03 25.44113211 55 30.290-01 04 08.62 .50 18.21oV! T05
A10U2hC C2023 03 25.45951511 55 22.918-01 05 25.69 .50 18.15oV! T05
A10U2hC C2023 03 25.46664511 55 20.150-01 05 55.32 .50 18.84oV! T05
3CS2421 KC2023 03 29.19424 12 20 42.25 -05 14 17.9 .50 16.9 GV! W94
3CS2421 KC2023 03 29.20060 12 20 39.83 -05 14 47.7 .50 17.6 GV! W94
3CS2421 KC2023 03 29.20684 12 20 37.47 -05 15 16.8 .50 17.2 GV! W94
C3N0RH1 C2023 03 29.31822 12 21 33.97 -05 56 41.2 .50 19.1 GV 703
C3N0RH1 C2023 03 29.32358 12 21 32.39 -05 57 06.0 .50 18.9 GV 703
C3N0RH1 C2023 03 29.32894 12 21 30.70 -05 57 31.2 .50 18.6 GV 703
C3N0RH1 C2023 03 29.33432 12 21 29.07 -05 57 56.9 .50 19.0 GV 703
Station data:
(104) San Marcello Pistoiese (N44.064178 E10.803750) Italy. Observers P.
Bacci, M. Maestripieri. Measurers P. Bacci, L. Tesi, G. Fagioli. 0.60-m
reflector + CCD.
(204) Schiaparelli Observatory (N45.868330 E8.769930) Italy.
Observer L. Buzzi. 0.60-m f/4.64 Newtonian + CCD0.84-m f/3.5 reflector +
CCD.
(511) Haute Provence (N43.931873 E5.715700) France. Observers W.
Polycarpe, M. Dennefield, W. Thuillot, B. Carry, P. David, S. Bouquillon,
F. Taris, P. Tanga, M. Delbó, E. Saquet, V. Robert. Measurers W. Thuillot,
S. Bouquillon, F. Taris, T. Carlucci, C. Barache. 1.20-m f/6 reflector +
CCD.
(703) Catalina Sky Survey (N32.417003 W110.732640) US/Arizona. Observers
G. J. Leonard, D. C. Fuls. Measurers E. J. Christensen, D. Fay, J. B.
Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Gröller, J. K. Hogan,
R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A.
Serrano, F. C. Shelly, K. W. Wierzchoś. 0.68-m Schmidt + 10K CCD.
(734) Farpoint Observatory, Eskridge (N38.890104 W96.001400) US/Kansas.
Observer G. Hug. 0.69-m reflector + CCD.
(958) Observatoire de Dax (N43.693324 W1.030390) France. Observer P.
Dupouy. 0.32-m Schmidt-Cassegrain.
(F51) Pan-STARRS 1, Haleakala (N20.707234 W156.255910) US/Hawaii.
Observers J. Bulger, T. Lowe, A. Schultz, M. Willman. Measurers K.
Chambers, S. Chastel, T. de Boer, L. Denneau, J. Fairlamb, H. Flewelling,
M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk.
1.8-m Ritchey-Chrétien + CCD.
(F52) Pan-STARRS 2, Haleakala (N20.707382 W156.255910) US/Hawaii.
Observers J. Bulger, T. Dukes, T. Lowe, A. Schultz, M. Willman. Measurers
K. Chambers, S. Chastel, T. de Boer, L. Denneau, J. Fairlamb, H.
Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y. Ramanjooloo, R. Wainscoat,
R. Weryk. 1.8-m Ritchey-Chrétien + CCD.
(H21) Astronomical Research Observatory, Westfield (N39.483054 W87.968270)
US/Illinois. Observer R. Holmes. Measurers S. Foglia, L. Buzzi, T.
Linder, R. Holmes. 0.76-m f/3.0 astrograph + CCD0.81-m f/4.0 astrograph +
CCD0.61-m f/4.5 astrograph + CCD0.40-m f/5.32 astrograph + CCD.
(H36) Sandlot Observatory, Scranton (N38.797690 W95.706400) US/Kansas.
Observer G. Hug. 0.56-m reflector + CCD.
(I41) Palomar Mountain--ZTF (N33.357338 W116.859780) US/California.
Observers B. T. Bolin, Z. T. F. Collaboration. Measurers B. T. Bolin,
Z.-Y. Lin, F. J. Masci. 1.2-m f/2.4 Schmidt.
(I52) Steward Observatory, Mt. Lemmon Station (N32.442544 W110.788920)
US/Arizona. Observers T. A. Pruyne, B. M. Africano, E. J. Christensen, G.
A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Gröller, J. A.
Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, D. Rankin, R. L.
Seaman, F. C. Shelly, K. W. Wierzchoś. 1.0-m prime focus + CCD.
(J57) Centro Astronómico Alto Turia, Valencia (N39.950156 W1.109110) Spain.
Observer A. Fornas. Measurers E. Arce, V. Mas, G. Fornas. 0.43-m f/6.8
reflector + CCD.
(J95) Great Shefford (N51.474969 W1.447003) UK/England. Observer P.
Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain + CCD.
(K63) G. Pascoli Observatory, Castelvecchio Pascoli (N44.082407 E10.462000)
Italy. Observer R. Bacci. 0.41-m f/3.2 Newtonian reflector + CCD.
(L01) Višnjan Observatory, Tičan (N45.290897 E13.749300) Croatia.
Observers K. Korlević, D. Pujagic, V. Dobos. Measurers D. Pujagic, K.
Korlević. 1.0-m f/2.9 reflector + CCD.
(Q62) iTelescope Observatory, Siding Spring (S31.273286 E149.064420)
Australia/NSW. Observer H. Sato. 0.51-m f/6.8 astrograph + CCD + f/4.5
focal reducer0.43-m f/6.8 astrograph + CCD + focal reducer0.43-m f/6.8
astrograph + CCD0.10-m f/5 astrograph + CCD0.127-m f/5.6 refractor +
CCD0.50-m f/6.8 reflector + CCD0.30-m f/9 reflector + CCD.
(T05) ATLAS-HKO, Haleakala (N20.707582 W156.257008) US/Hawaii. Observers
L. Denneau, A. Heinze, H. Weiland, J. Tonry, H. Flewelling, A.
Fitzsimmons, D. Young, B. Stalder. Measurers L. Denneau, A. Heinze, J.
Tonry. 0.5-m f/2.0 Schmidt + CCD.
(W68) ATLAS Chile, Rio Hurtado (S30.471010 W70.764980) Chile. Observers L.
Denneau, R. Siverd, J. Tonry, H. Weiland. Measurers L. Denneau, N.
Erasmus, A. Fitzsimmons, A. Lawrence, J. Robinson, R. Siverd, J. Tonry, H.
Weiland. 0.5-m reflector + CCD.
(W94) MAP, San Pedro de Atacama (S22.953074 W68.179810) Chile. Observers
A. Maury, G. Attard. Measurers A. Maury, G. Attard, D. Parrott. 0.28-m
f/2.2 Schmidt + CCD.
(Z31) Tenerife Observatory-LCO A, Tenerife (N28.300415 W16.511650) Canary
Islands (Spain). Observer M. Micheli. 1.0-m reflector + CCD.
(Z84) Calar Alto-Schmidt (N37.223981 W2.548143) Spain. Observer M. Micheli.
Measurers E. Schwab, D. Koschny, M. Micheli. 0.8-m f/3 Schmidt + CCD.
Orbital elements: EQUULEUS
Perigee 2023 Apr 6.70814357 +/- 0.000799 TT = 16:59:43.604 (JD 2460041.20814357)
Epoch 2023 Mar 29.0 TT = JDT 2460032.5 Find_Orb
M 228.06405799968 +/- 0.006 (J2000 equator)
n 15.15086895516 +/- 0.000698 Peri. 2.16701961 +/- 0.0006
a349123.014052 +/- 10.7 Node 357.68782918 +/- 0.00006
e 0.8805898855 +/- 9.35e-6 Incl. 35.93242263 +/- 0.00018
P 23.76d H 30.09 G 0.15 U 7.9
q 41688.8190591 +/- 4.54 Q 656557.209045 +/- 16.9
98 of 106 observations 2023 Mar. 18-29; mean residual 0".607
Residuals in arcseconds: 230226 W68( 140- 1696-) 230320 204 .203- .529+ 230320 K63 .207+ .474- 230226 W68( 140- 1695-) 230320 511 .727+ 1.68+ 230320 104 .098+ .257+ 230226 W68( 140- 1692-) 230320 511 .033- .186+ 230320 K63 .086- .554- 230226 W68( 140- 1691-) 230320 511 .678- 1.60- 230320 K63 .106- 4.7m- 230226 W68( 139- 1691-) 230320 511 .337+ 1.89+ 230320 K63 .356+ .411+ 230226 W68( 141- 1691-) 230320 204 .446+ .428+ 230320 104 .014+ .186+ 230316 F52(14.7- 32.4+) 230320 511 .262+ 1.04+ 230320 104 .274+ .194+ 230316 F52(13.3- 28.8+) 230320 511 .175- .774+ 230321 L01 .055- .088+ 230318 W68 .033- .802+ 230320 511 .230+ .726+ 230321 L01 .319- .206+ 230318 W68 .279- 1.00+ 230320 511 .108+ 1.29+ 230321 L01 .304- .120+ 230318 W68 .242- .851+ 230320 511 .064+ .460+ 230321 L01 .156- .036+ 230318 W68 .205- 1.00+ 230320 511 .091+ 1.02+ 230321 L01 .328- .149+ 230318 I41 1.24- 1.08- 230320 511 .097+ .677+ 230321 L01 .070- .059+ 230318 I41 1.00- .989- 230320 511 .184+ .542+ 230321 L01 .124- .086+ 230318 J95 .827+ .565- 230320 511 .176+ .981+ 230321 L01 .200- .104+ 230318 J95 .541+ 1.19- 230320 511 .224+ .590+ 230321 L01 .142- .130+ 230319 H36 .376- .874- 230320 511 .110+ .861+ 230321 L01 .107- .246+ 230319 H36 1.24- .123- 230320 511 .123+ .734+ 230321 L01 .089- .070+ 230319 I52 .211- .194+ 230320 511 .044- .548+ 230321 H21 8.0m- .045+ 230319 I52 .818- .482+ 230320 511 .074+ .325+ 230321 H21 .254+ .280+ 230319 703 1.45- 1.12+ 230320 511 .019+ .704+ 230321 H21 .087+ .233+ 230319 I52 .180- .557+ 230320 511 .065- .725+ 230321 F51 .199+ .135+ 230319 703 2.17- .306+ 230320 511 .288- .692+ 230321 F51 .376+ .124+ 230319 I52 .227+ .962+ 230320 734 .132- .028+ 230325 T05 .165- .183- 230319 H36 .143+ .569- 230320 734 .115- .097+ 230325 T05 .200+ .440- 230319 703 2.61- .755- 230320 734 .045+ 1.03+ 230325 T05 .400+ .861- 230319 Q62 1.22- .827- 230320 104 .139+ .272+ 230325 T05 .492+ .910- 230319 Q62 .212- .442+ 230320 104 .239+ .208+ 230329 W94 .329- .179- 230319 Q62 .548+ 1.93+ 230320 104 .118+ .150+ 230329 W94 .363- .103- 230319 J57 .381+ .753+ 230320 Z31 .106+ .127+ 230329 W94 .433- .167- 230319 J57 .019+ .552+ 230320 Z31 2.0m- .108+ 230329 703 .540- .641- 230319 J57 .348- .141- 230320 Z84 .123+ .082+ 230329 703 .538+ .065+ 230319 958 .142- .435+ 230320 Z84 .109+ .102+ 230329 703 .254- .164+ 230319 958 .131+ .346+ 230320 Z84 .079+ .089+ 230329 703 .360- .354- 230319 958 1.67- .276+ 230320 Z31 .068+ .083+ 230320 204 .033- .013+ 230320 K63 .363+ .537+ Ephemerides (geocentric): Date (UTC) RA Dec delta elong mag Con " sig PA ---- ----- ------------ ------------ ------ ----- --- --- -------- 2023 03 18 10 59 28.258 +09 31 11.68 480407 165.3 18.4 Leo .188 130 2023 03 19 11 09 57.710 +07 37 33.26 527844 167.6 18.6 Leo .027 159 2023 03 20 11 18 47.253 +06 00 22.14 566426 169.3 18.7 Leo .018 73 2023 03 21 11 26 33.430 +04 33 56.78 597369 170.7 18.7 Leo .022 169 2023 03 22 11 33 38.475 +03 14 43.67 621487 171.9 18.8 Leo .070 139 2023 03 23 11 40 17.293 +02 00 16.94 639331 172.9 18.8 Vir .129 134 2023 03 24 11 46 40.741 +00 48 48.86 651258 173.8 18.8 Vir .183 132 2023 03 25 11 52 57.396 -00 21 06.41 657479 174.7 18.7 Vir .222 131 2023 03 26 11 59 14.644 -01 30 42.95 658084 175.4 18.7 Vir .237 131 2023 03 27 12 05 39.482 -02 41 10.48 653055 176.1 18.7 Vir .216 132 2023 03 28 12 12 19.245 -03 53 41.00 642271 176.7 18.6 Vir .145 135 2023 03 29 12 19 22.420 -05 09 35.95 625498 176.9 18.5 Vir .025 43 2023 03 30 12 26 59.786 -06 30 35.86 602373 176.7 18.4 Vir .261 120 2023 03 31 12 35 26.236 -07 58 55.27 572363 175.9 18.4 Vir .689 123 2023 04 01 12 45 04.137 -09 37 48.89 534702 174.4 18.3 Vir 1.40 123 2023 04 02 12 56 30.255 -11 32 22.72 488270 172.3 18.2 Vir 2.62 123 2023 04 03 13 10 52.234 -13 51 27.44 431362 169.3 18.1 Vir 4.84 123 2023 04 04 13 30 36.338 -16 52 35.33 361206 164.8 17.8 Vir 9.49 122 2023 04 05 14 02 38.896 -21 18 56.59 272702 157.2 17.5 Vir 22.1 119 2023 04 06 15 23 09.668 -29 42 52.96 153830 138.4 16.8 Lib 89.4 110 2023 04 07 05 34 45.880 +35 19 45.59 69311 68.6 17.7 Aur 533 88 2023 04 08 09 34 39.964 +21 28 56.78 215295 121.2 18.0 Leo 58.8 118 2023 04 09 10 19 43.094 +15 08 11.78 316993 132.6 18.5 Leo 27.5 121 2023 04 10 10 43 17.436 +11 24 04.22 395246 138.4 18.8 Leo 17.5 122 2023 04 11 10 59 17.541 +08 44 08.38 457841 142.1 19.1 Leo 12.7 122 2023 04 12 11 11 35.064 +06 37 55.72 508567 144.7 19.2 Leo 9.95 122 2023 04 13 11 21 45.076 +04 51 53.41 549623 146.8 19.3 Leo 8.21 122 2023 04 14 11 30 35.765 +03 18 49.95 582413 148.5 19.4 Leo 7.04 122 2023 04 15 11 38 35.289 +01 54 26.00 607886 149.9 19.5 Vir 6.24 122 2023 04 16 11 46 02.049 +00 35 49.49 626698 151.1 19.5 Vir 5.71 121 2023 04 17 11 53 09.319 -00 39 04.32 639298 152.2 19.5 Vir 5.37 121 2023 04 18 12 00 07.623 -01 51 53.84 645975 153.3 19.5 Vir 5.22 121 2023 04 19 12 07 06.129 -03 04 03.64 646883 154.4 19.5 Vir 5.23 121 2023 04 20 12 14 13.606 -04 16 52.89 642057 155.5 19.4 Vir 5.42 121 2023 04 21 12 21 39.278 -05 31 42.46 631416 156.7 19.3 Vir 5.82 121 2023 04 22 12 29 33.792 -06 50 02.37 614759 157.9 19.2 Vir 6.48 122 2023 04 23 12 38 10.600 -08 13 41.75 591750 159.4 19.1 Vir 7.52 122 2023 04 24 12 47 48.258 -09 45 04.26 561883 161.1 18.9 Vir 9.10 122 2023 04 25 12 58 54.689 -11 27 35.07 524424 163.1 18.7 Vir 11.5 121 2023 04 26 13 12 16.116 -13 26 33.24 478302 165.6 18.4 Vir 15.5 121 2023 04 27 13 29 18.502 -15 51 05.86 421898 168.6 18.1 Vir 22.5 120 2023 04 28 13 53 10.143 -18 58 55.17 352591 171.9 17.5 Vir 36.4 118 2023 04 29 14 32 50.590 -23 30 40.45 265649 170.4 17.0 Lib 73.0 115 2023 04 30 16 13 52.725 -31 04 37.55 150984 150.4 16.4 Sco 257 103 2023 05 01 03 58 37.863 +30 17 36.52 69677 25.4 22?? Tau 1351 76 2023 05 02 08 59 57.406 +23 31 44.35 204744 89.7 19.0 Cnc 167 114 2023 05 03 09 58 21.892 +16 35 28.19 305542 103.9 19.3 Leo 77.7 118 2023 05 04 10 28 08.167 +12 24 31.26 383773 111.2 19.6 Leo 50.5 120 2023 05 05 10 48 08.220 +09 24 14.44 446443 115.9 19.8 Leo 38.0 120 2023 05 06 11 03 25.310 +07 01 30.66 497109 119.3 19.9 Leo 31.1 121 2023 05 07 11 16 01.659 +05 01 20.63 537872 122.0 20.0 Leo 26.8 121 2023 05 08 11 26 58.521 +03 15 42.85 570079 124.3 20.0 Leo 24.1 121 2023 05 09 11 36 51.351 +01 39 46.91 594644 126.2 20.1 Leo 22.3 120 2023 05 10 11 46 03.135 +00 10 19.81 612199 127.9 20.1 Vir 21.1 120 2023 05 11 11 54 50.407 -01 14 58.72 623180 129.5 20.1 Vir 20.4 120 2023 05 12 12 03 26.357 -02 38 00.16 627870 131.1 20.1 Vir 20.2 120 2023 05 13 12 12 02.700 -04 00 21.86 626424 132.6 20.0 Vir 20.3 120 2023 05 14 12 20 51.035 -05 23 37.37 618875 134.2 19.9 Vir 20.8 120 2023 05 15 12 30 04.122 -06 49 25.57 605138 135.9 19.8 Vir 21.8 120 2023 05 16 12 39 57.461 -08 19 40.91 584989 137.7 19.7 Vir 23.4 119 2023 05 17 12 50 51.681 -09 56 47.58 558046 139.8 19.6 Vir 25.8 119 2023 05 18 13 03 16.812 -11 44 02.43 523718 142.3 19.4 Vir 29.4 119 2023 05 19 13 18 00.879 -13 46 16.92 481123 145.4 19.1 Vir 35.1 118 2023 05 20 13 36 29.706 -16 11 21.93 428925 149.3 18.7 Vir 44.7 117 2023 05 21 14 01 41.100 -19 13 18.47 365027 154.8 18.2 Vir 62.8 115 2023 05 22 14 41 16.854 -23 19 58.48 285871 163.1 17.4 Lib 105 112 2023 05 23 16 05 37.269 -29 19 29.12 184851 170.9 16.2 Sco 261 103 2023 05 24 22 37 13.641 -10 05 08.99 67239 85.2 16.8 Aqr 2087 60 2023 05 25 07 42 29.593 +28 15 06.97 160852 49.7 21?? Gem 391 105 2023 05 26 09 22 06.752 +19 44 23.11 267804 72.6 20.4 Leo 149 115 RA/decs are astrometric J2000 coordinates (corrected for light time lag, but in the inertial J2000 frame, i.e., not rotated for precession or nutation, and differential light deflection is not included.) Display can be turned on/off in the 'advanced options' for ephemerides. When turning them on, you can select from various format choices (base-60, decimal, different precisions, etc.) Distances are in kilometers for distances under one million km (about 0.00668 AU), and in AUs for larger distances. Uncertainties are one-sigma values shown in arcseconds (unless they are very large, in which case they are shown in arcminutes or degrees). In theory, the object should be within this distance of the nominal RA/dec 67% of the time, within twice that distance 95% of the time, and within three times that distance 99.7% of the time. In practice, astrometric errors are not actually Gaussian, which means these uncertainties are sometimes over- or underestimated. So you may have to look farther, or not nearly as far, as the uncertainties say. The object will probably be offset from nominal somewhere along the indicated position angle, especially if the orbit is well determined.