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
2020-06-22 01:48:44 C 20 21 41.90 -45 58 44.3 q Y00
2020-06-23 18:32:56 C 20 13 19.71 -48 52 08.3 q L68
2020-06-23 18:38:47 C 20 13 18.44 -48 52 32.9 q L68
2020-06-23 19:00:34 C 20 13 13.64 -48 54 05.1 q L68
2020-06-24 03:26:45 C 20 11 21.16 -49 29 25.6 q Y00
2020-06-24 03:28:35 C 20 11 20.71 -49 29 33.7 q Y00
2020-06-28 03:54:19 C 19 46 50.97 -55 43 11.4 o W92
2020-06-28 04:22:28 C 19 46 42.69 -55 44 51.9 o W92
2020-07-03 11:52:14 C 19 04 35.71 -62 18 59.7 q E89
2020-07-03 11:59:19 C 19 04 32.95 -62 19 17.4 q E89
2020-07-10 11:19:42 C 17 56 01.44 -67 34 52.3 q E89
2020-07-10 11:24:13 C 17 55 59.48 -67 34 57.9 q E89
2020-07-10 11:27:56 C 17 55 57.83 -67 35 01.9 q E89
2020-07-10 11:32:09 C 17 55 56.04 -67 35 07.3 q E89
2021-08-14 03:39:04 C 11 34 38.23 +39 05 32.0 U I41
2021-08-14 03:42:33 C 11 34 39.10 +39 05 27.6 U I41
2021-08-14 03:46:03 C 11 34 39.98 +39 05 23.3 U I41
2021-08-14 03:49:33 C 11 34 40.85 +39 05 18.9 U I41
2021-08-18 03:31:14 C 11 58 12.99 +36 55 17.9 U I41
2021-08-18 03:34:01 C 11 58 13.67 +36 55 14.1 U I41
2021-08-18 03:34:43 C 11 58 13.81 +36 55 12.8 U I41
2021-08-18 03:40:58 C 11 58 15.33 +36 55 03.9 U I41
2021-08-18 03:44:27 C 11 58 16.12 +36 54 58.6 U I41
2021-09-22 02:43:29 C 14 32 58.22 +10 28 14.4 U I41
2021-09-22 02:47:00 C 14 32 58.72 +10 28 07.7 U I41
2021-09-22 02:54:00 C 14 32 59.67 +10 27 54.1 U I41
2021-09-22 02:57:31 C 14 33 00.18 +10 27 47.4 U I41
2022-10-07 08:02:15 C 08 34 15.274 -10 09 25.92 V W68
2022-10-07 08:06:48 C 08 34 15.689 -10 09 22.72 V W68
2022-10-07 08:24:31 C 08 34 17.462 -10 09 11.70 V W68
2022-10-07 08:48:38 C 08 34 19.901 -10 08 56.40 V W68
2022-10-08 14:51:57 C 08 37 23.484 -09 49 21.40 V T05
2022-10-08 14:57:51 C 08 37 24.089 -09 49 16.50 V T05
2022-10-08 15:08:57 C 08 37 25.229 -09 49 09.91 V T05
2022-10-08 15:26:40 C 08 37 26.928 -09 48 58.82 V T05
2022-10-19 11:44:41 C 09 06 10.739 -06 26 41.10 V 703
2022-10-19 11:52:20 C 09 06 11.747 -06 26 33.72 V 703
2022-10-19 12:00:10 C 09 06 12.596 -06 26 26.38 V 703
2022-10-19 12:07:59 C 09 06 13.532 -06 26 19.14 V 703
2022-10-25 12:04:05 C 09 24 29.869 -04 02 53.48 V 703
2022-10-25 12:11:43 C 09 24 30.902 -04 02 44.77 V 703
2022-10-25 12:19:22 C 09 24 31.907 -04 02 36.67 V 703
2022-10-25 12:27:00 C 09 24 32.936 -04 02 27.82 V 703
2022-10-28 11:32:22 C 09 34 27.206 -02 40 47.42 V 703
2022-10-28 11:40:05 C 09 34 28.286 -02 40 37.96 V 703
2022-10-28 11:47:57 C 09 34 29.431 -02 40 28.67 V 703
2022-10-28 11:55:50 C 09 34 30.547 -02 40 19.27 V 703
2022-10-31 11:10:50 C 09 45 09.198 -01 10 05.16 V 703
2022-10-31 11:18:29 C 09 45 10.332 -01 09 54.47 V 703
2022-10-31 11:26:09 C 09 45 11.538 -01 09 44.24 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)