IAA RAS IAA Minor Planet Database

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
2010-06-17 23:46:28 S 02 01 54.73 -52 29 01.7 – L C51
2010-06-17 23:46:39 S 02 01 54.74 -52 29 01.3 – L C51
2010-06-18 06:07:41 S 02 03 11.31 -52 33 50.0 – L C51
2010-06-18 07:42:51 S 02 03 30.38 -52 35 01.7 – L C51
2010-06-18 09:18:12 S 02 03 49.57 -52 36 13.5 – L C51
2010-06-18 12:28:43 S 02 04 27.89 -52 38 36.4 – L C51
2010-06-18 14:03:53 S 02 04 47.09 -52 39 48.2 – L C51
2010-06-18 15:39:14 S 02 05 06.16 -52 40 58.9 – L C51
2010-06-18 17:14:24 S 02 05 25.42 -52 42 09.8 – L C51
2010-06-18 18:49:45 S 02 05 44.52 -52 43 21.3 – L C51
2010-06-18 20:24:55 S 02 06 03.67 -52 44 32.2 – L C51
2010-06-18 20:25:06 S 02 06 03.75 -52 44 32.0 – L C51
2010-06-18 22:00:16 S 02 06 22.97 -52 45 43.3 – L C51
2010-06-18 23:35:37 S 02 06 42.22 -52 46 54.4 – L C51
2010-06-19 01:10:47 S 02 07 01.21 -52 48 07.4 – L C51
2010-06-19 05:56:39 S 02 07 59.11 -52 51 36.7 – L C51
2010-06-19 07:31:49 S 02 08 18.26 -52 52 47.0 – L C51
2010-06-19 09:07:10 S 02 08 37.49 -52 53 57.9 – L C51
2010-06-19 13:52:52 S 02 09 35.23 -52 57 27.3 – L C51
2010-06-19 15:28:13 S 02 09 54.63 -52 58 38.1 – L C51
2010-06-19 17:03:23 S 02 10 13.85 -52 59 47.5 – L C51
2010-06-19 17:03:34 S 02 10 13.87 -52 59 47.8 – L C51
2010-06-19 18:38:44 S 02 10 33.13 -53 00 57.0 – L C51
2010-06-19 20:13:54 S 02 10 52.35 -53 02 07.6 – L C51
2010-06-19 20:14:05 S 02 10 52.44 -53 02 07.0 – L C51
2010-06-19 21:49:15 S 02 11 11.71 -53 03 16.7 – L C51
2010-06-20 00:59:46 S 02 11 50.30 -53 05 35.9 – L C51
2010-06-20 07:20:48 S 02 13 07.52 -53 10 13.2 – L C51
2010-06-20 13:41:50 S 02 14 25.03 -53 14 48.5 – L C51
2010-06-20 16:52:21 S 02 15 03.70 -53 17 05.6 – L C51
2010-06-20 16:52:32 S 02 15 03.72 -53 17 05.8 – L C51
2010-06-20 20:03:03 S 02 15 42.43 -53 19 22.7 – L C51
2010-06-20 23:13:34 S 02 16 21.25 -53 21 38.5 – L C51
2010-06-21 05:34:36 S 02 17 38.79 -53 26 10.5 – L C51
2010-07-04 19:03:38 S 03 25 09.07 -56 43 22.5 – L C51
2010-07-04 19:03:49 S 03 25 09.08 -56 43 22.6 – L C51
2010-07-04 20:38:59 S 03 25 28.83 -56 44 09.6 – L C51
2010-07-04 22:14:09 S 03 25 48.77 -56 44 56.9 – L C51
2010-07-04 22:14:20 S 03 25 48.71 -56 44 57.0 – L C51
2010-07-04 23:49:30 S 03 26 08.52 -56 45 44.4 – L C51
2010-07-05 06:10:32 S 03 27 27.80 -56 48 52.3 – L C51
2010-07-05 09:21:03 S 03 28 07.45 -56 50 26.0 – L C51
2010-07-05 15:42:05 S 03 29 26.597 -56 53 32.42 – L C51
2010-07-05 18:52:36 S 03 30 06.278 -56 55 07.54 – L C51
2010-07-05 22:03:08 S 03 30 45.749 -56 56 36.67 – L C51
2010-07-06 07:34:41 S 03 32 44.575 -57 01 10.16 – L C51
2010-07-06 13:55:43 S 03 34 03.682 -57 04 11.64 – L C51
2010-07-06 13:55:54 S 03 34 03.63 -57 04 09.8 – L C51
2010-07-06 17:06:25 S 03 34 43.14 -57 05 39.9 – L C51
2010-07-06 20:16:56 S 03 35 22.72 -57 07 09.0 – L C51
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)