IAA RAS IAA Minor Planet Database

1866 Sisyphus (1972 XA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5381207270 ± 5.42e-09
Semi-major axis (a)1.8933719410 AU ± 4.50e-10
Inclination (i)41.20633494° ± 7.87e-07
Long. of Asc. Node (Ω)63.44668864° ± 1.04e-06
Arg. of Perihelion (ω)293.09862767° ± 1.07e-06
Mean Anomaly (M)140.66424737° ± 8.67e-07
Mean Motion (n)0.3783191899°/day ± 1.35e-10
Perihelion dist (q)0.87450926 AU ± 1.03e-08
Aphelion dist (Q)2.91223463 AU ± 1.03e-08
Orbital Period2.60527700 yr ± 9.28e-10
Physical Parameters
H (abs. magnitude)12.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.220″
Uncertainty0
Orbit TypeApollo
MOID0.102869 AU
Observations Used9210
Radar Obs Used1
Gaia Obs Used79
Oppositions38
Arc Total1955-2026
First Observation Used1955-01-26
Last Observation Used2026-04-06
Observations (11960)
Date Type RA Dec Mag Band Observatory
2020-01-19 07:14:23 S 05 23 05.246 +79 32 15.25 – V C57
2020-01-19 07:14:23 s 1 -202151.62 6 +111592.38 5890.0 – C57
2020-01-19 07:44:23 S 05 22 59.426 +79 31 59.66 – V C57
2020-01-19 07:44:23 s 1 -201529.50 1 +109246.66 0.0 – C57
2020-01-19 08:14:23 S 05 22 53.964 +79 31 44.00 – V C57
2020-01-19 08:14:23 s 1 -200886.16 4 +106889.50 5150.0 – C57
2020-01-19 08:44:23 S 05 22 48.245 +79 31 27.84 – V C57
2020-01-19 08:44:23 s 1 -200221.21 6 +104520.89 730.0 – C57
2020-01-19 09:14:23 S 05 22 42.605 +79 31 12.07 – V C57
2020-01-19 09:14:23 s 1 -199534.25 0 +102140.84 6090.0 – C57
2020-01-19 09:44:23 S 05 22 36.936 +79 30 56.16 – V C57
2020-01-19 09:44:23 s 1 -198824.84 4 +99749.366 600.0 – C57
2020-01-19 10:14:23 S 05 22 31.212 +79 30 39.92 – V C57
2020-01-19 10:14:23 s 1 -198092.56 6 +97346.459 3570.0 – C57
2020-01-19 10:44:23 S 05 22 25.896 +79 30 24.37 – V C57
2020-01-19 10:44:23 s 1 -197336.97 0 +94932.143 4320.0 – C57
2020-01-19 11:14:23 S 05 22 20.143 +79 30 08.39 – V C57
2020-01-19 11:14:23 s 1 -196557.59 6 +92506.436 2120.0 – C57
2020-01-19 11:44:23 S 05 22 14.690 +79 29 52.33 – V C57
2020-01-19 11:44:23 s 1 -195753.97 2 +90069.363 6250.0 – C57
2020-01-19 12:14:23 S 05 22 09.000 +79 29 36.31 – V C57
2020-01-19 12:14:23 s 1 -194925.61 0 +87620.953 5930.0 – C57
2020-01-19 12:44:23 S 05 22 03.689 +79 29 20.65 – V C57
2020-01-19 12:44:23 s 1 -194072.00 7 +85161.240 380.0 – C57
2020-01-19 13:14:23 S 05 21 58.046 +79 29 04.31 – V C57
2020-01-19 13:14:23 s 1 -193192.64 6 +82690.267 8790.0 – C57
2020-01-19 13:44:23 S 05 21 52.795 +79 28 48.40 – V C57
2020-01-19 13:44:23 s 1 -192286.99 2 +80208.081 300.0 – C57
2020-01-19 14:14:23 S 05 21 47.208 +79 28 32.59 – V C57
2020-01-19 14:14:23 s 1 -191354.49 5 +77714.738 4060.0 – C57
2020-01-19 14:44:23 S 05 21 41.837 +79 28 16.07 – V C57
2020-01-19 14:44:23 s 1 -190394.58 7 +75210.299 9150.0 – C57
2020-01-19 15:14:23 S 05 21 36.509 +79 28 00.12 – V C57
2020-01-19 15:14:23 s 1 -189406.68 0 +72694.837 4660.0 – C57
2020-01-19 15:44:23 S 05 21 30.953 +79 27 43.67 – V C57
2020-01-19 15:44:23 s 1 -188390.16 8 +70168.431 9600.0 – C57
2020-01-19 16:14:23 S 05 21 25.812 +79 27 27.90 – V C57
2020-01-19 16:14:23 s 1 -187344.42 8 +67631.172 2990.0 – C57
2020-01-19 16:44:23 S 05 21 20.446 +79 27 11.41 – V C57
2020-01-19 16:44:23 s 1 -186268.81 2 +65083.159 3790.0 – C57
2020-01-19 17:14:23 S 05 21 15.144 +79 26 55.21 – V C57
2020-01-19 17:14:23 s 1 -185162.65 3 +62524.505 930.0 – C57
2020-01-19 17:44:23 S 05 21 10.003 +79 26 39.19 – V C57
2020-01-19 17:44:23 s 1 -184025.26 1 +59955.332 3300.0 – C57
2020-01-19 18:14:23 S 05 21 04.606 +79 26 22.38 – V C57
2020-01-19 18:14:23 s 1 -182855.92 5 +57375.778 9740.0 – C57
2020-01-19 18:44:23 S 05 20 59.556 +79 26 06.61 – V C57
2020-01-19 18:44:23 s 1 -181653.90 6 +54785.994 9070.0 – C57
2020-01-19 19:14:23 S 05 20 54.326 +79 25 50.27 – V C57
2020-01-19 19:14:23 s 1 -180418.44 3 +52186.147 40.0 – C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-12-08 00:00:00 -295248 20 Hz 2380 -1 -1
1985-12-08.000000 -29524800 2000 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)