1620 Geographos (1951 RA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3355121545 ± 2.00e+00
Semi-major axis (a)1.2457769668 AU ± 3.00e+00
Inclination (i)13.33577542° ± 4.00e+00
Long. of Asc. Node (Ω)337.14082621° ± 5.00e+00
Arg. of Perihelion (ω)277.01835526° ± 6.00e+00
Mean Anomaly (M)212.92032873° ± 2.36e-05
Mean Motion (n)0.7088458984°/day ± 2.56e+00
Perihelion dist (q)0.82780365 AU ± 3.19e+00
Aphelion dist (Q)1.66375028 AU ± 4.72e+00
Orbital Period1.39046623 yr ± 5.02e+00
NGA Modelr2
A23.55475120e-06 AU/d²
Physical Parameters
H (abs. magnitude)15.26
G (slope)0.15
Alternative Designations

1983 CY3

Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.276″
Uncertainty0
Orbit TypeApollo
MOID0.028806 AU
Observations Used9056
Radar Obs Used5
Gaia Obs Used104
Oppositions19
Arc Total1951-2017
First Observation Used1951-08-31
Last Observation Used2026-04-08
Observations (11927)
Date Type RA Dec Mag Band Observatory
2021-12-15 18:03:54 s 1 -139782.94 5 - 3767.472 7380.0 C57
2021-12-15 18:13:54 S 12 10 14.674 +06 58 27.37 V C57
2021-12-15 18:13:54 s 1 -139222.26 2 - 4730.910 8480.0 C57
2021-12-15 18:23:54 S 12 10 16.097 +06 58 20.78 V C57
2021-12-15 18:23:54 s 1 -138655.73 6 - 5694.153 5480.0 C57
2021-12-15 18:33:54 S 12 10 16.862 +06 58 06.49 V C57
2021-12-15 18:33:54 s 1 -138083.32 1 - 6657.158 8190.0 C57
2021-12-15 19:33:54 S 12 10 23.064 +06 57 06.95 V C57
2021-12-15 19:33:54 s 1 -134522.62 1 -12427.624 4780.0 C57
2021-12-15 19:43:54 S 12 10 24.048 +06 56 59.32 V C57
2021-12-15 19:43:54 s 1 -133907.70 6 -13387.661 2610.0 C57
2021-12-15 19:53:54 S 12 10 25.267 +06 56 45.31 V C57
2021-12-15 19:53:54 s 1 -133286.53 3 -14347.075 4740.0 C57
2021-12-15 20:03:54 S 12 10 26.273 +06 56 36.24 V C57
2021-12-15 20:03:54 s 1 -132659.05 6 -15305.815 990.0 C57
2021-12-15 20:13:54 S 12 10 27.377 +06 56 29.54 V C57
2021-12-15 20:13:54 s 1 -132025.22 7 -16263.824 1180.0 C57
2021-12-15 20:23:54 S 12 10 28.318 +06 56 17.92 V C57
2021-12-15 20:23:54 s 1 -131385.00 0 -17221.049 5130.0 C57
2021-12-17 13:01:04 C 12 15 04.89 +06 15 26.4 V T08
2021-12-17 13:05:43 C 12 15 05.39 +06 15 22.3 V T08
2021-12-17 13:13:43 C 12 15 06.29 +06 15 13.8 V T08
2021-12-17 13:28:24 C 12 15 07.94 +06 14 58.4 V T08
2021-12-18 13:23:55 S 12 18 00.828 +05 51 15.98 V C57
2021-12-18 13:23:55 s 1 +177020.99 6 +122079.48 8080.0 C57
2021-12-18 13:43:55 S 12 18 03.456 +05 50 50.89 V C57
2021-12-18 13:43:55 s 1 +177151.31 3 +123715.51 1530.0 C57
2021-12-18 15:53:55 S 12 18 18.998 +05 48 32.04 V C57
2021-12-18 15:53:55 s 1 +177790.52 1 +134202.09 1240.0 C57
2021-12-18 16:03:55 S 12 18 20.290 +05 48 22.61 V C57
2021-12-18 16:03:55 s 1 +177825.24 4 +134998.16 2570.0 C57
2021-12-18 16:13:55 S 12 18 21.727 +05 48 11.88 V C57
2021-12-18 16:13:55 s 1 +177857.96 3 +135792.72 5990.0 C57
2021-12-18 18:23:55 S 12 18 37.274 +05 45 54.86 V C57
2021-12-18 18:23:55 s 1 +178106.37 3 +145984.67 2670.0 C57
2021-12-18 18:43:55 S 12 18 40.056 +05 45 33.01 V C57
2021-12-18 18:43:55 s 1 +178116.31 9 +147530.09 800.0 C57
2021-12-18 18:53:55 S 12 18 41.026 +05 45 22.18 V C57
2021-12-18 18:53:55 s 1 +178118.55 2 +148300.55 4090.0 C57
2021-12-18 19:03:55 S 12 18 42.065 +05 45 10.30 V C57
2021-12-18 19:03:55 s 1 +178118.97 1 +149069.51 250.0 C57
2021-12-18 19:13:55 S 12 18 43.550 +05 45 00.47 V C57
2021-12-18 19:13:55 s 1 +178117.58 8 +149836.96 9320.0 C57
2021-12-18 19:23:55 S 12 18 44.858 +05 44 46.72 V C57
2021-12-18 19:23:55 s 1 +178114.41 3 +150602.92 1350.0 C57
2021-12-18 21:23:55 S 12 18 59.402 +05 42 42.01 V C57
2021-12-18 21:23:55 s 1 +177940.14 2 +159677.98 980.0 C57
2021-12-18 21:33:55 S 12 19 00.398 +05 42 29.70 V C57
2021-12-18 21:33:55 s 1 +177914.56 6 +160424.56 5090.0 C57
2021-12-18 21:43:55 S 12 19 01.733 +05 42 20.48 V C57
Radar Observations (12)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1983-02-27 05:00:00 161795 5 Hz 2380 -1 -1
1983-02-27.208333 16179500 500 Hz 2380 251 251
1983-02-28 05:04:00 142007628 30 us 2380 -1 -1
1983-02-28.211111 14200762800 30000 us 2380 251 251
1994-08-28 07:10:00 38936537.06 1.76 us 8510 -14 -14
1994-08-28 07:10:00 -364880.593 0.9 Hz 8510 -14 -14
1994-08-28.298611 3893653706 1760 us 8510 253 253
1994-08-29 04:40:00 42596456.4 1.13 us 8510 -14 -14
1994-08-29 04:40:00 -427851.027 0.2 Hz 8510 -14 -14
1994-08-29.194444 4259645640 1130 us 8510 253 253
1994-09-02 07:20:00 -615553.2 0.5 Hz 8510 -14 -14
1994-09-02.305556 -61555320 50 Hz 8510 253 253
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)