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
2019-11-10 14:55:14 C 09 10 12.25 -22 13 44.6 V T05
2019-11-12 04:24:07 C 09 13 44.81 -21 44 48.0 V C95
2019-11-12 04:38:04 C 09 13 46.10 -21 44 38.2 V C95
2019-11-12 14:35:17 C 09 14 44.16 -21 36 25.0 V T08
2019-11-12 14:39:56 C 09 14 44.61 -21 36 21.2 V T08
2019-11-12 14:47:58 C 09 14 45.38 -21 36 14.5 V T08
2019-11-14 15:18:11 C 09 19 36.90 -20 53 30.7 V T05
2019-11-14 15:23:29 C 09 19 37.40 -20 53 25.6 V T05
2019-11-14 15:32:45 C 09 19 38.33 -20 53 17.0 V T05
2019-11-14 15:39:53 C 09 19 39.07 -20 53 10.1 V T05
2019-11-18 12:07:39 C 09 29 47.07 -19 15 27.2 V 703
2019-11-18 12:14:58 C 09 29 47.84 -19 15 19.0 V 703
2019-11-18 12:22:20 C 09 29 48.73 -19 15 09.8 V 703
2019-11-18 12:29:39 C 09 29 49.55 -19 15 01.0 V 703
2019-11-20 15:09:35 C 09 35 58.83 -18 10 12.4 V T08
2019-11-20 15:14:17 C 09 35 59.40 -18 10 05.9 V T08
2019-11-20 15:22:30 C 09 36 00.40 -18 09 54.7 V T08
2019-11-20 15:30:06 C 09 36 01.32 -18 09 44.4 V T08
2019-11-23 11:14:08 C 09 45 06.09 -16 27 19.4 V 703
2019-11-23 11:21:53 C 09 45 07.16 -16 27 06.6 V 703
2019-11-23 11:29:38 C 09 45 08.23 -16 26 53.9 V 703
2019-11-23 11:37:23 C 09 45 09.31 -16 26 40.8 V 703
2019-11-29 14:04:56 C 10 09 24.75 -11 18 03.0 V T08
2019-11-29 14:09:47 C 10 09 25.67 -11 17 50.2 V T08
2019-11-29 14:17:17 C 10 09 27.08 -11 17 30.6 V T08
2019-11-29 14:31:57 C 10 09 29.85 -11 16 52.0 V T08
2019-12-03 12:45:20 C 10 30 07.15 -06 24 23.7 V T08
2019-12-03 12:50:13 C 10 30 08.34 -06 24 05.9 V T08
2019-12-03 13:04:47 C 10 30 11.88 -06 23 13.3 V T08
2019-12-03 13:12:57 C 10 30 13.86 -06 22 43.7 V T08
2019-12-05 00:26:47 S 10 39 21.209 -04 06 34.45 L C51
2019-12-05 03:35:06 S 10 40 12.835 -03 53 39.34 L C51
2019-12-05 06:43:25 S 10 41 04.934 -03 40 36.52 L C51
2019-12-05 09:51:45 S 10 41 57.516 -03 27 24.77 L C51
2019-12-05 12:26:12 C 10 42 43.09 -03 16 45.8 V T05
2019-12-05 12:31:02 C 10 42 44.44 -03 16 25.2 V T05
2019-12-05 12:38:34 C 10 42 46.55 -03 15 53.1 V T05
2019-12-05 12:57:22 C 10 42 51.78 -03 14 33.1 V T05
2019-12-05 12:59:31 S 10 42 50.412 -03 14 08.23 L C51
2019-12-05 16:08:23 S 10 43 44.124 -03 00 36.43 L C51
2019-12-05 19:16:42 S 10 44 38.158 -02 46 59.45 L C51
2019-12-05 22:25:01 S 10 45 32.693 -02 33 13.61 L C51
2019-12-06 01:32:36 S 10 46 27.494 -02 19 23.74 L C51
2019-12-06 01:32:47 S 10 46 27.564 -02 19 22.69 L C51
2019-12-06 04:40:55 S 10 47 23.047 -02 05 20.58 L C51
2019-12-06 07:49:14 S 10 48 19.111 -01 51 08.60 L C51
2019-12-06 10:22:57 C 10 49 07.16 -01 39 46.7 V 703
2019-12-06 10:30:11 C 10 49 09.25 -01 39 13.0 V 703
2019-12-06 10:37:24 C 10 49 11.39 -01 38 39.9 V 703
2019-12-06 10:44:37 C 10 49 13.53 -01 38 06.9 V 703
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)