2101 Adonis (1936 CA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7641273448 ± 2.00e+00
Semi-major axis (a)1.8740253992 AU ± 3.00e+00
Inclination (i)1.31997884° ± 4.00e+00
Long. of Asc. Node (Ω)349.40567161° ± 5.00e+00
Arg. of Perihelion (ω)43.71128561° ± 6.00e+00
Mean Anomaly (M)24.47916672° ± 7.33e-06
Mean Motion (n)0.3841926633°/day ± 9.23e-01
Perihelion dist (q)0.44203135 AU ± 3.81e+00
Aphelion dist (Q)3.30601945 AU ± 6.49e+00
Orbital Period2.56544796 yr ± 6.16e+00
NGA Modelr2
A2-3.31959118e-06 AU/d²
Physical Parameters
H (abs. magnitude)18.69
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.120″
Uncertainty0
Orbit TypeApollo
MOID0.011508 AU
Observations Used167
Radar Obs Used5
Oppositions29
Arc Total1936-2025
First Observation Used1936-02-12
Last Observation Used2025-07-19
Observations (181)
Date Type RA Dec Mag Band Observatory
1936-02-12 20:43:25 A 09 20 29.44 +26 17 24.2 012
1936-02-12 21:06:51 A 09 20 23.46 +26 15 44.8 12.5 012
1936-02-12 21:30:16 A 09 20 18.75 +26 14 25.7 012
1936-02-12 21:45:14 A 09 20 13.63 +26 13 06.2 012
1936-02-12 22:00:12 A 09 20 09.75 +26 12 06.6 012
1936-02-13 20:35:30 A 09 15 42.01 +24 50 51.3 012
1936-02-13 20:57:56 A 09 15 38.36 +24 49 50.7 12.5 012
1936-02-14 20:38:32 A 09 12 16.49 +23 46 38.6 012
1936-02-14 21:25:24 A 09 12 10.47 +23 44 55.4 012
1936-02-17 22:03:29 A 09 06 13.69 +21 45 26.3 012
1936-02-20 21:49:41 A 09 03 23.19 +20 38 21.6 012
1936-02-21 07:05:32 A 09 03 05.60 +20 31 36.8 A 801
1936-02-21 08:07:51 A 09 03 03.74 +20 30 49.8 A 801
1936-02-22 01:15:41 A 09 02 43.94 +20 19 21.3 754
1936-02-23 01:30:12 A 09 02 17.29 +20 06 54.5 012
1936-02-23 06:16:56 A 09 02 09.25 +20 02 05.6 754
1936-02-24 21:11:24 A 09 01 41.66 +19 42 03.5 024
1936-02-24 22:43:46 A 09 01 39.37 +19 40 13.3 012
1936-02-25 04:14:00 A 09 01 38.73 +19 38 54.7 672
1936-02-25 05:05:34 A 09 01 37.79 +19 38 29.7 672
1936-02-27 05:49:51 A 09 01 21.94 +19 17 54.2 662
1936-02-27 07:12:51 A 09 01 21.11 +19 17 21.5 662
1936-02-28 07:53:43 A 09 01 18.52 +19 08 04.7 754
1936-02-28 08:30:43 A 09 01 18.43 +19 07 50.8 754
1936-02-29 09:25:37 A 09 01 20.67 +18 59 14.3 662
1936-03-12 04:04:20 A 09 04 42.08 +17 45 05.6 662
1936-03-12 04:40:56 A 09 04 42.77 +17 44 55.2 672
1936-03-12 05:15:04 A 09 04 43.29 +17 44 47.6 672
1936-03-13 04:21:12 A 09 05 10.69 +17 39 47.6 662
1936-03-13 06:01:11 A 09 05 12.31 +17 39 27.3 662
1936-03-16 06:33:50 A 09 06 46.74 +17 24 00.9 662
1936-03-16 21:49:37 A 09 07 08.99 +17 20 48.6 012
1936-03-17 21:51:40 A 09 07 44.50 +17 15 44.3 14.0 012
1936-03-27 05:21:59 A 09 14 00.52 +16 30 00.9 672
1936-03-27 06:17:34 A 09 14 02.14 +16 29 49.4 672
1936-04-10 04:35:36 A 09 25 53.23 +15 18 38.6 672
1936-04-11 04:54:46 A 09 26 50.25 +15 13 14.6 672
1977-02-14 11:41:00 A 11 23 19.27 +06 54 29.2 675
1977-02-14 11:48:59 A 11 23 16.75 +06 54 42.6 675
1977-02-24 04:56:04 A 10 28 09.83 +11 15 54.8 18.5 809
1977-02-24 05:26:00 A 10 28 04.54 +11 16 16.0 809
1977-02-25 05:06:06 A 10 24 24.83 +11 31 55.2 18.5 809
1977-02-26 05:28:59 A 10 20 54.89 +11 46 15.0 675
1977-02-26 05:39:00 A 10 20 53.62 +11 46 20.7 675
1977-02-26 05:46:03 A 10 20 51.60 +11 46 49.2 18.5 809
1977-02-27 05:24:10 A 10 17 42.04 +11 59 54.3 19.0 809
1977-02-28 06:23:04 A 10 14 35.47 +12 12 30.1 19.0 809
1977-03-13 03:25:18 A 09 51 02.72 +13 38 41.0 809
1977-03-17 03:20:19 A 09 47 36.50 +13 48 05.2 A 801
1977-03-18 04:56:17 A 09 46 53.92 +13 49 47.4 A 801
Radar Observations (10)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1984-07-14 18:20:00 -328238.7 0.3 Hz 2380 -1 -1
1984-07-14.763889 -32823870 30 Hz 2380 251 251
1984-07-15 18:20:00 -341813.1 0.3 Hz 2380 -1 -1
1984-07-15.763889 -34181310 30 Hz 2380 251 251
1984-07-16 17:40:00 -350648 0.3 Hz 2380 -1 -1
1984-07-16.736111 -35064800 30 Hz 2380 251 251
1984-07-17 17:30:00 -358654.3 0.3 Hz 2380 -1 -1
1984-07-17.729167 -35865430 30 Hz 2380 251 251
1984-07-18 17:20:00 -365447.2 0.3 Hz 2380 -1 -1
1984-07-18.722222 -36544720 30 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)