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
2014-01-23 23:51:57 C 01 41 01.58 +01 56 47.1 q I15
2014-01-23 23:57:27 C 01 41 01.22 +01 57 10.6 q I15
2014-01-28 02:43:32 C 01 35 09.39 +08 51 24.4 q G96
2014-01-28 02:50:04 C 01 35 09.00 +08 51 50.6 q G96
2014-01-28 02:56:39 C 01 35 08.62 +08 52 16.7 q G96
2014-01-28 03:03:13 C 01 35 08.24 +08 52 42.7 q G96
2014-02-18 01:48:43 C 01 11 55.07 +33 58 11.6 q H45
2014-02-18 01:50:14 C 01 11 55.01 +33 58 14.8 q H45
2014-02-18 01:51:40 C 01 11 54.91 +33 58 17.8 q H45
2014-02-18 01:52:40 C 01 11 54.90 +33 58 20.2 q H45
2014-02-18 01:55:14 C 01 11 54.80 +33 58 25.5 q H45
2014-02-18 01:56:39 C 01 11 54.70 +33 58 28.6 q H45
2014-06-04 07:38:21 C 19 17 22.28 +68 08 36.0 q 703
2014-06-04 07:51:37 C 19 17 15.91 +68 08 22.4 q 703
2014-06-04 07:58:16 C 19 17 12.61 +68 08 15.5 q 703
2014-06-08 05:57:41 S 18 32 21.05 +65 54 30.4 L C51
2014-06-08 07:32:19 S 18 31 36.81 +65 51 36.2 L C51
2014-06-08 09:07:06 S 18 30 52.38 +65 48 40.9 L C51
2014-06-08 10:41:44 S 18 30 08.16 +65 45 44.4 L C51
2014-06-08 12:16:32 S 18 29 23.906 +65 42 46.19 L C51
2014-06-08 13:51:20 S 18 28 39.686 +65 39 46.55 L C51
2014-06-08 15:25:56 S 18 27 55.59 +65 36 46.1 L C51
2014-06-08 17:00:45 S 18 27 11.46 +65 33 43.8 L C51
2014-06-08 18:35:33 S 18 26 27.49 +65 30 39.9 L C51
2014-06-08 20:10:10 S 18 25 43.60 +65 27 35.0 L C51
2014-06-09 22:53:20 C 18 13 29.46 +64 32 00.6 q C47
2014-06-09 22:57:35 C 18 13 27.48 +64 31 51.2 q C47
2014-06-09 23:01:50 C 18 13 25.49 +64 31 41.7 q C47
2014-06-09 23:06:37 C 18 13 23.28 +64 31 31.0 q C47
2014-06-10 10:59:17 C 18 08 02.686 +64 04 35.65 L F51
2014-06-10 11:18:27 C 18 07 53.918 +64 03 50.89 L F51
2014-06-10 11:37:37 C 18 07 45.134 +64 03 05.93 L F51
2014-06-10 11:56:46 C 18 07 36.403 +64 02 20.98 L F51
2014-06-11 07:52:12 C 17 58 49.02 +63 13 35.4 q H45
2014-06-11 07:53:00 C 17 58 48.69 +63 13 33.2 q H45
2014-06-11 07:53:55 C 17 58 48.25 +63 13 31.3 q H45
2014-06-11 07:55:06 C 17 58 47.70 +63 13 28.2 q H45
2014-06-11 07:56:36 C 17 58 47.15 +63 13 23.6 q H45
2014-06-11 07:58:11 C 17 58 46.45 +63 13 19.5 q H45
2014-06-11 07:59:10 C 17 58 45.90 +63 13 17.5 q H45
2014-06-13 12:31:20 C 17 36 42.990 +60 45 30.63 L F51
2014-06-13 12:49:35 C 17 36 35.483 +60 44 33.38 L F51
2014-06-13 13:07:50 C 17 36 28.034 +60 43 36.63 L F51
2014-06-13 13:26:04 C 17 36 20.559 +60 42 39.34 L F51
2014-06-14 05:45:26 C 17 29 53.81 +59 50 44.4 u H21
2014-06-14 05:48:03 C 17 29 52.75 +59 50 35.8 u H21
2014-06-14 05:50:33 C 17 29 51.76 +59 50 27.8 u H21
2014-06-14 05:53:02 C 17 29 50.76 +59 50 19.6 u H21
2014-06-14 05:55:32 C 17 29 49.78 +59 50 11.4 u H21
2014-06-14 05:58:01 C 17 29 48.77 +59 50 03.2 u H21
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)