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
2020-01-09 17:14:23 S 06 34 05.040 +80 34 23.56 – V C57
2020-01-09 17:14:23 s 1 +120560.98 3 +263852.43 4900.0 – C57
2020-01-09 17:44:23 S 06 33 53.561 +80 34 25.90 – V C57
2020-01-09 17:44:23 s 1 +119852.15 8 +265598.48 4010.0 – C57
2020-01-09 18:14:23 S 06 33 42.029 +80 34 27.73 – V C57
2020-01-09 18:14:23 s 1 +119136.88 4 +267331.00 8290.0 – C57
2020-01-09 18:44:23 S 06 33 30.494 +80 34 29.53 – V C57
2020-01-09 18:44:23 s 1 +118415.27 3 +269050.07 8010.0 – C57
2020-01-09 19:14:23 S 06 33 18.936 +80 34 32.59 – V C57
2020-01-09 19:14:23 s 1 +117687.44 0 +270755.78 3400.0 – C57
2020-01-09 19:44:23 S 06 33 07.366 +80 34 34.21 – V C57
2020-01-09 19:44:23 s 1 +116953.49 2 +272448.21 4700.0 – C57
2020-01-09 20:14:23 S 06 32 55.656 +80 34 35.83 – V C57
2020-01-09 20:14:23 s 1 +116213.53 8 +274127.44 2140.0 – C57
2020-01-09 20:44:23 S 06 32 44.434 +80 34 37.67 – V C57
2020-01-09 20:44:23 s 1 +115467.68 3 +275793.55 5960.0 – C57
2020-01-09 21:14:23 S 06 32 32.916 +80 34 39.54 – V C57
2020-01-09 21:14:23 s 1 +114716.03 0 +277446.62 6360.0 – C57
2020-01-09 21:44:23 S 06 32 21.055 +80 34 41.95 – V C57
2020-01-09 21:44:23 s 1 +113958.68 0 +279086.72 3580.0 – C57
2020-01-09 22:14:23 S 06 32 09.689 +80 34 43.61 – V C57
2020-01-09 22:14:23 s 1 +113195.73 3 +280713.94 7810.0 – C57
2020-01-09 22:44:23 S 06 31 58.085 +80 34 45.30 – V C57
2020-01-09 22:44:23 s 1 +112427.28 5 +282328.34 9270.0 – C57
2020-01-09 23:14:23 S 06 31 46.771 +80 34 46.45 – V C57
2020-01-09 23:14:23 s 1 +111653.43 3 +283930.00 8150.0 – C57
2020-01-09 23:44:23 S 06 31 35.165 +80 34 48.07 – V C57
2020-01-09 23:44:23 s 1 +110874.27 0 +285519.00 4660.0 – C57
2020-01-10 00:14:23 S 06 31 23.426 +80 34 50.05 – V C57
2020-01-10 00:14:23 s 1 +110089.88 7 +287095.40 8990.0 – C57
2020-01-10 00:44:23 S 06 31 12.110 +80 34 51.53 – V C57
2020-01-10 00:44:23 s 1 +109300.37 5 +288659.27 1320.0 – C57
2020-01-10 01:14:23 S 06 31 00.511 +80 34 52.54 – V C57
2020-01-10 01:14:23 s 1 +108505.82 2 +290210.69 1840.0 – C57
2020-01-10 01:44:23 S 06 30 49.224 +80 34 53.90 – V C57
2020-01-10 01:44:23 s 1 +107706.31 5 +291749.73 720.0 – C57
2020-01-10 02:14:23 S 06 30 37.517 +80 34 54.91 – V C57
2020-01-10 02:14:23 s 1 +106901.94 0 +293276.45 8150.0 – C57
2020-01-10 02:44:23 S 06 30 25.910 +80 34 56.71 – V C57
2020-01-10 02:44:23 s 1 +106092.78 0 +294790.91 4290.0 – C57
2020-01-10 03:14:23 S 06 30 14.508 +80 34 57.86 – V C57
2020-01-10 03:14:23 s 1 +105278.91 8 +296293.19 9320.0 – C57
2020-01-10 03:44:23 S 06 30 03.014 +80 34 58.44 – V C57
2020-01-10 03:44:23 s 1 +104460.43 3 +297783.35 3390.0 – C57
2020-01-10 04:14:23 S 06 29 51.775 +80 34 59.52 – V C57
2020-01-10 04:14:23 s 1 +103637.40 7 +299261.46 6670.0 – C57
2020-01-10 04:44:23 S 06 29 39.888 +80 35 00.35 – V C57
2020-01-10 04:44:23 s 1 +102809.91 6 +300727.57 9320.0 – C57
2020-01-10 05:14:23 S 06 29 28.457 +80 35 01.57 – V C57
2020-01-10 05:14:23 s 1 +101978.03 7 +302181.75 1480.0 – 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)