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
2019-06-14 02:44:31 s 1 -148290.25 7 +352988.70 720.0 C57
2019-06-14 03:14:31 S 19 49 22.673 -83 24 35.64 V C57
2019-06-14 03:14:31 s 1 -149063.66 8 +352087.31 7310.0 C57
2019-06-14 03:44:31 S 19 49 40.704 -83 26 48.73 V C57
2019-06-14 03:44:31 s 1 -149833.56 0 +351177.93 6680.0 C57
2019-06-14 04:14:31 S 19 49 57.185 -83 28 49.22 V C57
2019-06-14 04:14:31 s 1 -150599.90 1 +350260.57 8720.0 C57
2019-06-14 04:44:31 S 19 50 16.310 -83 31 07.03 V C57
2019-06-14 04:44:31 s 1 -151362.65 9 +349335.20 3320.0 C57
2019-06-14 05:14:31 S 19 50 33.005 -83 33 07.20 V C57
2019-06-14 05:14:31 s 1 -152121.80 5 +348401.81 350.0 C57
2019-06-14 05:44:31 S 19 50 52.937 -83 35 27.02 V C57
2019-06-14 05:44:31 s 1 -152877.30 5 +347460.40 9710.0 C57
2019-06-14 06:14:31 S 19 51 11.417 -83 37 36.48 V C57
2019-06-14 06:14:31 s 1 -153629.12 7 +346510.95 1280.0 C57
2019-06-14 06:44:31 S 19 51 29.450 -83 39 41.04 V C57
2019-06-14 06:44:31 s 1 -154377.24 0 +345553.45 4930.0 C57
2019-06-14 07:14:31 S 19 51 49.042 -83 41 54.64 V C57
2019-06-14 07:14:31 s 1 -155121.60 9 +344587.88 550.0 C57
2019-06-14 07:44:31 S 19 52 08.390 -83 44 05.93 V C57
2019-06-14 07:44:31 s 1 -155862.20 4 +343614.24 8010.0 C57
2019-06-14 08:14:31 S 19 52 28.442 -83 46 18.91 V C57
2019-06-14 08:14:31 s 1 -156598.98 9 +342632.52 7200.0 C57
2019-06-14 08:44:31 S 19 52 47.417 -83 48 24.23 V C57
2019-06-14 08:44:31 s 1 -157331.93 1 +341642.70 7990.0 C57
2019-06-14 09:14:31 S 19 53 07.171 -83 50 33.54 V C57
2019-06-14 09:14:31 s 1 -158060.99 7 +340644.76 250.0 C57
2019-06-14 09:44:31 S 19 53 28.286 -83 52 49.44 V C57
2019-06-14 09:44:31 s 1 -158786.15 1 +339638.70 3870.0 C57
2019-06-14 10:14:31 S 19 53 47.611 -83 54 53.10 V C57
2019-06-14 10:14:31 s 1 -159507.36 0 +338624.50 8720.0 C57
2019-06-14 12:14:31 S 19 55 12.456 -84 03 37.44 V C57
2019-06-14 12:14:31 s 1 -162352.03 6 +334486.07 7800.0 C57
2019-06-14 12:44:31 S 19 55 33.029 -84 05 41.53 V C57
2019-06-14 12:44:31 s 1 -163052.98 5 +333430.98 6840.0 C57
2019-06-14 13:14:31 S 19 55 56.527 -84 08 00.89 V C57
2019-06-14 13:14:31 s 1 -163749.77 4 +332367.67 6330.0 C57
2019-06-14 13:44:31 S 19 56 18.262 -84 10 07.93 V C57
2019-06-14 13:44:31 s 1 -164442.36 5 +331296.13 6120.0 C57
2019-06-14 14:14:31 S 19 56 41.861 -84 12 24.59 V C57
2019-06-14 14:14:31 s 1 -165130.72 1 +330216.34 6090.0 C57
2019-06-14 15:14:31 S 19 57 26.993 -84 16 41.34 V C57
2019-06-14 15:14:31 s 1 -166494.57 3 +328031.96 5990.0 C57
2019-06-14 15:44:31 S 19 57 50.832 -84 18 54.00 V C57
2019-06-14 15:44:31 s 1 -167169.99 4 +326927.34 5640.0 C57
2019-06-14 16:14:31 S 19 58 12.300 -84 20 52.33 V C57
2019-06-14 16:14:31 s 1 -167841.02 5 +325814.41 4910.0 C57
2019-06-14 16:44:31 S 19 58 37.980 -84 23 11.15 V C57
2019-06-14 16:44:31 s 1 -168507.62 7 +324693.16 3640.0 C57
2019-06-14 17:14:31 S 19 59 01.560 -84 25 18.55 V 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)