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
2020-05-14 16:35:02 S 21 14 01.978 +04 40 33.56 L C51
2020-05-14 21:17:25 S 21 14 04.507 +04 32 37.79 L C51
2020-05-14 21:17:36 S 21 14 04.560 +04 32 37.97 L C51
2020-05-15 00:25:55 S 21 14 06.192 +04 27 18.79 L C51
2020-05-15 03:34:14 S 21 14 07.855 +04 21 58.54 L C51
2020-05-17 09:49:21 C 21 14 30.72 +02 45 35.4 V 703
2020-05-17 09:58:19 C 21 14 30.75 +02 45 18.3 V 703
2020-05-17 10:07:16 C 21 14 30.77 +02 45 02.4 V 703
2020-05-17 10:16:14 C 21 14 30.78 +02 44 45.7 V 703
2020-05-19 14:12:38 C 21 14 39.70 +01 04 54.2 V T08
2020-05-19 14:22:32 C 21 14 39.66 +01 04 34.5 V T08
2020-05-19 14:39:51 C 21 14 39.62 +01 03 59.8 V T08
2020-05-19 14:49:49 C 21 14 39.61 +01 03 39.7 V T08
2020-05-21 09:39:10 C 21 14 37.49 -00 25 00.0 V 703
2020-05-21 09:48:51 C 21 14 37.45 -00 25 20.7 V 703
2020-05-21 09:58:32 C 21 14 37.50 -00 25 41.4 V 703
2020-05-21 10:08:12 C 21 14 37.35 -00 26 02.2 V 703
2020-05-21 13:31:58 C 21 14 36.73 -00 33 17.1 V T05
2020-05-21 13:36:37 C 21 14 36.72 -00 33 27.2 V T05
2020-05-21 13:50:49 C 21 14 36.62 -00 33 57.8 V T05
2020-05-21 14:03:22 C 21 14 36.53 -00 34 24.7 V T05
2020-05-23 13:13:56 C 21 14 21.55 -02 19 48.1 V T08
2020-05-23 13:27:53 C 21 14 21.40 -02 20 20.5 V T08
2020-05-23 13:47:05 C 21 14 21.19 -02 21 05.1 V T08
2020-05-24 09:22:55 C 21 14 11.23 -03 07 16.7 V G96
2020-05-24 09:31:06 C 21 14 11.13 -03 07 36.2 V G96
2020-05-24 09:39:16 C 21 14 11.03 -03 07 55.9 V G96
2020-05-24 09:47:28 C 21 14 10.93 -03 08 15.5 V G96
2020-05-25 14:07:03 C 21 13 51.76 -04 17 30.9 V T05
2020-05-25 14:33:10 C 21 13 51.34 -04 18 36.3 V T05
2020-05-25 14:37:46 C 21 13 51.26 -04 18 48.0 V T05
2020-05-25 14:47:30 C 21 13 51.10 -04 19 12.3 V T05
2020-05-26 09:31:23 C 21 13 35.96 -05 06 49.8 V 703
2020-05-26 09:38:57 C 21 13 35.86 -05 07 09.1 V 703
2020-05-26 09:46:30 C 21 13 35.73 -05 07 29.1 V 703
2020-05-26 09:54:04 C 21 13 35.57 -05 07 48.0 V 703
2020-05-29 13:00:36 C 21 12 07.89 -08 33 11.1 V T05
2020-05-29 13:05:15 C 21 12 07.77 -08 33 24.6 V T05
2020-05-29 13:15:10 C 21 12 07.49 -08 33 53.5 V T05
2020-05-29 13:23:47 C 21 12 07.24 -08 34 18.5 V T05
2020-05-30 10:01:47 C 21 11 35.30 -09 35 03.6 V 703
2020-05-30 10:09:57 C 21 11 35.13 -09 35 28.2 V 703
2020-05-30 10:18:07 C 21 11 34.86 -09 35 53.1 V 703
2020-05-30 10:26:17 C 21 11 34.62 -09 36 17.3 V 703
2020-05-31 13:29:46 C 21 10 47.18 -10 58 49.3 V T08
2020-05-31 13:32:25 C 21 10 47.10 -10 58 57.5 V T08
2020-05-31 13:38:25 C 21 10 46.89 -10 59 16.2 V T08
2020-05-31 14:50:08 C 21 10 44.33 -11 02 59.9 V T08
2020-06-03 12:38:01 C 21 08 09.58 -14 51 59.7 V T08
2020-06-03 12:42:00 C 21 08 09.37 -14 52 13.6 V T08
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)