2102 Tantalus (1975 YA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2993501212 ± 6.46e-09
Semi-major axis (a)1.2900609716 AU ± 2.87e-10
Inclination (i)64.00517356° ± 3.04e-06
Long. of Asc. Node (Ω)94.35226460° ± 4.17e-07
Arg. of Perihelion (ω)61.49851571° ± 2.17e-06
Mean Anomaly (M)347.35567572° ± 1.82e-06
Mean Motion (n)0.6726620417°/day ± 2.24e-10
Perihelion dist (q)0.90388106 AU ± 8.33e-09
Aphelion dist (Q)1.67624088 AU ± 8.34e-09
Orbital Period1.46526223 yr ± 4.88e-10
Physical Parameters
H (abs. magnitude)16.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.249″
Uncertainty0
Orbit TypeApollo
MOID0.042239 AU
Observations Used1824
Radar Obs Used1
Gaia Obs Used127
Oppositions13
Arc Total1976-2026
First Observation Used1976-01-04
Last Observation Used2026-04-05
Observations (2255)
Date Type RA Dec Mag Band Observatory
2022-10-31 11:33:50 C 09 45 12.708 -01 09 33.88 V 703
2022-11-09 14:38:32 C 10 23 46.882 +04 29 22.42 V T08
2022-11-09 15:14:40 C 10 23 54.070 +04 30 26.32 V T08
2022-11-09 15:33:49 C 10 23 57.847 +04 31 00.26 V T08
2022-11-09 15:37:05 C 10 23 58.478 +04 31 06.78 V T08
2022-11-11 13:19:44 C 10 33 25.872 +05 54 46.91 V T08
2022-11-11 13:33:01 C 10 33 28.687 +05 55 11.89 V T08
2022-11-11 13:51:38 C 10 33 32.609 +05 55 47.28 V T08
2022-11-11 13:59:10 C 10 33 34.193 +05 56 01.32 V T08
2022-11-12 10:39:53 C 10 38 02.202 +06 35 22.31 V 703
2022-11-12 10:46:52 C 10 38 03.732 +06 35 36.24 V 703
2022-11-12 10:53:50 C 10 38 05.212 +06 35 49.38 V 703
2022-11-12 11:00:48 C 10 38 06.731 +06 36 03.42 V 703
2022-11-21 11:08:21 C 11 32 57.260 +14 17 49.63 V 703
2022-11-21 11:16:01 C 11 32 59.482 +14 18 07.38 V 703
2022-11-21 11:23:38 C 11 33 01.714 +14 18 25.13 V 703
2022-11-21 11:35:54 C 11 33 05.224 +14 18 53.46 V 703
2022-11-24 11:16:43 C 11 54 56.437 +17 05 10.57 V 703
2022-11-24 11:24:18 C 11 54 58.828 +17 05 28.07 V 703
2022-11-24 11:31:53 C 11 55 01.276 +17 05 46.18 V 703
2022-11-24 11:39:28 C 11 55 03.612 +17 06 03.64 V 703
2022-11-25 14:52:01 C 12 03 51.418 +18 09 21.38 V T08
2022-11-25 14:58:00 C 12 03 53.359 +18 09 35.03 V T08
2022-11-25 15:14:35 C 12 03 58.771 +18 10 13.58 V T08
2022-11-25 15:25:41 C 12 04 02.386 +18 10 39.94 V T08
2022-11-27 11:18:56 C 12 18 47.822 +19 51 31.25 V 703
2022-11-27 11:25:59 C 12 18 50.195 +19 51 47.41 V 703
2022-11-27 11:33:03 C 12 18 52.650 +19 52 03.61 V 703
2022-11-27 11:40:06 C 12 18 55.044 +19 52 19.78 V 703
2022-11-30 11:50:12 C 12 44 34.955 +22 31 42.13 V 703
2022-11-30 11:57:48 C 12 44 37.727 +22 31 58.01 V 703
2022-11-30 12:05:24 C 12 44 40.502 +22 32 14.42 V 703
2022-11-30 12:12:59 C 12 44 43.282 +22 32 30.62 V 703
2022-12-23 12:38:34 C 16 06 31.932 +30 51 48.85 V 703
2022-12-23 12:48:10 C 16 06 34.762 +30 51 46.58 V 703
2022-12-23 12:57:46 C 16 06 37.580 +30 51 44.57 V 703
2022-12-23 13:07:22 C 16 06 40.417 +30 51 42.05 V 703
2023-04-16 11:26:57 C 21 01 29.284 -01 55 09.52 V 703
2023-04-16 11:33:19 C 21 01 29.698 -01 55 15.85 V 703
2023-04-16 11:39:42 C 21 01 30.083 -01 55 21.61 V 703
2023-04-16 11:46:05 C 21 01 30.475 -01 55 28.31 V 703
2023-04-20 08:43:07 C 21 07 11.834 -03 27 42.48 V W68
2023-04-20 08:48:24 C 21 07 12.156 -03 27 47.74 V W68
2023-04-20 09:02:38 C 21 07 12.996 -03 28 03.07 V W68
2023-04-20 09:12:32 C 21 07 13.610 -03 28 13.22 V W68
2023-04-21 11:25:44 C 21 08 49.232 -03 55 38.86 V 703
2023-04-21 11:29:38 C 21 08 49.524 -03 55 44.00 V 703
2023-04-21 11:33:33 C 21 08 49.769 -03 55 47.14 V 703
2023-04-21 11:37:27 C 21 08 49.938 -03 55 51.67 V 703
2023-04-22 07:45:30 C 21 10 03.242 -04 17 05.71 V W68
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-01-04 22:03:00 169565888.79 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)