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
2014-06-14 06:00:30 C 17 29 47.79 +59 49 55.2 u H21
2014-06-14 06:02:59 C 17 29 46.80 +59 49 47.0 u H21
2014-06-14 06:06:13 C 17 29 45.50 +59 49 36.5 u H21
2014-06-15 05:13:16 C 17 20 55.19 +58 31 15.1 u H21
2014-06-15 05:16:36 C 17 20 53.93 +58 31 03.4 u H21
2014-06-15 05:19:55 C 17 20 52.65 +58 30 51.7 u H21
2014-06-15 05:23:15 C 17 20 51.38 +58 30 40.1 u H21
2014-06-15 05:26:35 C 17 20 50.12 +58 30 28.4 u H21
2014-06-15 05:29:55 C 17 20 48.84 +58 30 16.7 u H21
2014-06-15 05:33:14 C 17 20 47.57 +58 30 05.0 u H21
2014-06-15 05:36:34 C 17 20 46.30 +58 29 53.3 u H21
2014-06-15 05:41:04 C 17 20 44.57 +58 29 37.5 u H21
2014-06-15 06:41:34 C 17 20 21.51 +58 26 04.2 u H21
2014-06-15 06:43:53 C 17 20 20.61 +58 25 55.9 u H21
2014-06-15 06:46:12 C 17 20 19.70 +58 25 48.0 u H21
2014-06-15 06:47:59 C 17 20 19.05 +58 25 41.4 u H21
2014-06-17 21:11:07 C 16 58 26.78 +54 25 24.3 q G34
2014-06-17 21:14:24 C 16 58 25.73 +54 25 11.5 q G34
2014-06-17 21:16:23 C 16 58 25.03 +54 25 02.6 q G34
2014-06-17 21:18:50 C 16 58 24.21 +54 24 52.2 q G34
2014-06-18 05:20:16 C 16 55 47.73 +53 51 09.6 q 703
2014-06-18 05:30:52 C 16 55 44.26 +53 50 24.9 q 703
2014-06-18 05:51:58 C 16 55 37.28 +53 48 55.2 q 703
2014-06-19 04:11:36 C 16 48 36.84 +52 11 21.1 719
2014-06-19 04:44:29 C 16 48 26.61 +52 08 54.6 719
2014-06-21 04:20:35 C 16 34 39.71 +48 24 48.8 r 719
2014-06-21 04:41:55 C 16 34 33.73 +48 23 04.1 r 719
2014-06-21 05:58:25 C 16 34 11.92 +48 16 45.6 q H45
2014-06-21 05:59:37 C 16 34 11.58 +48 16 39.5 q H45
2014-06-21 06:00:48 C 16 34 11.25 +48 16 33.6 q H45
2014-06-21 06:01:49 C 16 34 10.97 +48 16 28.7 q H45
2014-06-21 06:02:52 C 16 34 10.67 +48 16 23.4 q H45
2014-06-21 06:03:46 C 16 34 10.45 +48 16 19.2 q H45
2014-06-23 04:14:32 C 16 22 18.33 +44 19 22.2 719
2014-06-23 04:45:11 C 16 22 10.76 +44 16 39.7 719
2014-06-25 02:51:27 C 16 11 37.49 +40 04 15.8 q I15
2014-06-25 02:54:01 C 16 11 36.92 +40 04 01.4 q I15
2014-06-25 02:56:35 C 16 11 36.36 +40 03 47.1 q I15
2014-06-26 03:40:45 C 16 06 27.31 +37 43 13.2 r 719
2014-06-26 04:10:38 C 16 06 21.14 +37 40 23.3 r 719
2014-06-29 04:21:46 C 15 53 06.27 +30 36 27.1 719
2014-06-29 04:32:33 C 15 53 04.49 +30 35 23.1 719
2014-06-29 07:32:39 C 15 52 33.71 +30 17 28.1 q 703
2014-06-29 07:43:54 C 15 52 31.81 +30 16 20.8 q 703
2014-06-29 07:55:10 C 15 52 29.90 +30 15 13.4 q 703
2014-07-01 04:52:59 C 15 45 32.53 +25 46 50.4 q H45
2014-07-01 04:54:27 C 15 45 32.30 +25 46 41.9 q H45
2014-07-01 04:55:43 C 15 45 32.11 +25 46 34.3 q H45
2014-07-01 04:56:45 C 15 45 31.96 +25 46 28.2 q H45
2014-07-01 04:57:27 C 15 45 31.83 +25 46 23.8 q H45
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)