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
2023-05-29 02:51:46 C 22 00 46.080 -29 06 51.44 V M22
2023-06-22 23:54:05 C 22 27 45.962 -59 16 34.46 V M22
2023-06-23 00:28:11 C 22 27 46.817 -59 18 24.98 V M22
2023-06-23 00:32:31 C 22 27 46.937 -59 18 39.24 V M22
2023-06-23 01:07:09 C 22 27 47.786 -59 20 31.24 V M22
2023-06-30 06:37:08 C 22 31 07.313 -68 20 19.43 V W68
2023-06-30 07:05:41 C 22 31 07.253 -68 21 44.53 V W68
2023-06-30 07:09:02 C 22 31 07.265 -68 21 54.65 V W68
2023-06-30 07:09:41 C 22 31 07.387 -68 21 56.20 V W68
2023-06-30 07:12:59 C 22 31 07.229 -68 22 06.38 V W68
2023-06-30 07:18:34 C 22 31 07.202 -68 22 23.16 V W68
2023-06-30 07:20:32 C 22 31 07.162 -68 22 28.67 V W68
2023-06-30 07:50:57 C 22 31 07.183 -68 23 59.78 V W68
2023-07-02 00:03:23 C 22 31 08.030 -70 21 42.48 V M22
2023-07-02 00:39:06 C 22 31 07.541 -70 23 26.45 V M22
2023-07-02 00:46:24 C 22 31 07.469 -70 23 47.33 V M22
2023-07-07 00:55:12 S 22 25 16.622 -75 54 42.62 V C57
2023-07-07 00:55:12 s 1 +192419.36 9 +272718.39 9980.0 C57
2023-07-07 01:35:12 S 22 25 14.167 -75 56 26.63 V C57
2023-07-07 01:35:12 s 1 +191483.05 8 +274099.10 2520.0 C57
2023-07-07 01:55:12 S 22 25 12.859 -75 57 17.39 V C57
2023-07-07 01:55:12 s 1 +191010.88 2 +274783.82 8900.0 C57
2023-07-07 02:35:12 S 22 25 09.888 -75 59 02.33 V C57
2023-07-07 02:35:12 s 1 +190058.56 0 +276141.96 2450.0 C57
2023-07-07 02:55:12 S 22 25 07.891 -75 59 54.64 V C57
2023-07-07 02:55:12 s 1 +189578.42 1 +276815.36 9740.0 C57
2023-07-07 03:15:12 S 22 25 07.620 -76 00 41.98 V C57
2023-07-07 03:15:12 s 1 +189095.64 7 +277484.98 4180.0 C57
2023-07-07 03:35:12 S 22 25 05.246 -76 01 31.37 V C57
2023-07-07 03:35:12 s 1 +188610.25 7 +278150.83 5910.0 C57
2023-07-07 03:55:12 S 22 25 04.162 -76 02 25.98 V C57
2023-07-07 03:55:12 s 1 +188122.24 1 +278812.88 4910.0 C57
2023-07-07 04:15:12 S 22 25 02.150 -76 03 09.94 V C57
2023-07-07 04:15:12 s 1 +187631.61 6 +279471.13 1330.0 C57
2023-07-07 04:35:12 S 22 25 00.612 -76 03 59.87 V C57
2023-07-07 04:35:12 s 1 +187138.40 4 +280125.60 5290.0 C57
2023-07-07 04:55:12 S 22 24 58.906 -76 04 53.15 V C57
2023-07-07 04:55:12 s 1 +186642.59 3 +280776.24 6790.0 C57
2023-07-07 05:15:12 S 22 24 57.941 -76 05 46.57 V C57
2023-07-07 05:15:12 s 1 +186144.20 3 +281423.07 5970.0 C57
2023-07-07 05:35:12 S 22 24 56.568 -76 06 38.66 V C57
2023-07-07 05:35:12 s 1 +185643.25 2 +282066.11 2960.0 C57
2023-07-07 05:55:12 S 22 24 55.121 -76 07 25.00 V C57
2023-07-07 05:55:12 s 1 +185139.73 0 +282705.30 7760.0 C57
2023-07-07 06:15:12 S 22 24 52.848 -76 08 20.22 V C57
2023-07-07 06:15:12 s 1 +184633.65 6 +283340.68 480.0 C57
2023-07-07 06:35:12 S 22 24 51.982 -76 09 12.64 V C57
2023-07-07 06:35:12 s 1 +184125.05 0 +283972.23 1280.0 C57
2023-07-07 06:55:12 S 22 24 50.417 -76 09 59.11 V C57
2023-07-07 06:55:12 s 1 +183613.90 0 +284599.94 150.0 C57
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)