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
2021-12-14 13:13:54 s 1 -177555.42 1 +148726.05 3160.0 C57
2021-12-14 13:23:54 S 12 07 15.031 +07 27 06.19 V C57
2021-12-14 13:23:54 s 1 -177563.26 9 +147962.53 8930.0 C57
2021-12-14 13:33:54 S 12 07 15.972 +07 26 56.94 V C57
2021-12-14 13:33:54 s 1 -177569.35 7 +147197.54 7020.0 C57
2021-12-14 13:43:54 S 12 07 17.062 +07 26 43.15 V C57
2021-12-14 13:43:54 s 1 -177573.67 3 +146431.09 7400.0 C57
2021-12-14 14:53:54 S 12 07 24.494 +07 25 38.64 V C57
2021-12-14 14:53:54 s 1 -177553.43 7 +141024.70 420.0 C57
2021-12-14 15:03:54 S 12 07 25.289 +07 25 29.14 V C57
2021-12-14 15:03:54 s 1 -177543.21 2 +140246.47 7520.0 C57
2021-12-14 15:13:54 S 12 07 26.376 +07 25 14.77 V C57
2021-12-14 15:13:54 s 1 -177531.12 0 +139466.76 6510.0 C57
2021-12-14 15:23:54 S 12 07 27.638 +07 25 09.19 V C57
2021-12-14 15:23:54 s 1 -177517.15 2 +138685.58 7340.0 C57
2021-12-14 15:33:54 S 12 07 28.738 +07 24 56.41 V C57
2021-12-14 15:33:54 s 1 -177501.29 5 +137902.92 9960.0 C57
2021-12-14 15:53:54 S 12 07 30.614 +07 24 35.06 V C57
2021-12-14 15:53:54 s 1 -177463.87 2 +136333.17 430.0 C57
2021-12-14 16:13:54 S 12 07 32.839 +07 24 19.87 V C57
2021-12-14 16:13:54 s 1 -177418.76 0 +134757.52 7510.0 C57
2021-12-14 16:23:54 S 12 07 33.756 +07 24 09.97 V C57
2021-12-14 16:23:54 s 1 -177393.29 2 +133967.47 8420.0 C57
2021-12-14 17:33:54 S 12 07 41.064 +07 23 00.31 V C57
2021-12-14 17:33:54 s 1 -177159.56 3 +128395.74 4370.0 C57
2021-12-14 17:43:54 S 12 07 42.158 +07 22 51.06 V C57
2021-12-14 17:43:54 s 1 -177118.10 7 +127593.86 5990.0 C57
2021-12-14 17:53:54 S 12 07 43.097 +07 22 38.46 V C57
2021-12-14 17:53:54 s 1 -177074.59 6 +126790.50 8720.0 C57
2021-12-14 18:13:54 S 12 07 45.343 +07 22 19.31 V C57
2021-12-14 18:13:54 s 1 -176981.36 5 +125179.34 7310.0 C57
2021-12-14 18:23:54 S 12 07 46.349 +07 22 06.78 V C57
2021-12-14 18:23:54 s 1 -176931.61 8 +124371.54 3060.0 C57
2021-12-14 18:33:54 S 12 07 47.422 +07 21 55.62 V C57
2021-12-14 18:33:54 s 1 -176879.76 7 +123562.25 9710.0 C57
2021-12-14 18:43:54 S 12 07 48.492 +07 21 48.49 V C57
2021-12-14 18:43:54 s 1 -176825.79 8 +122751.49 7210.0 C57
2021-12-14 18:53:54 S 12 07 49.579 +07 21 36.94 V C57
2021-12-14 18:53:54 s 1 -176769.69 8 +121939.25 5500.0 C57
2021-12-14 20:03:54 S 12 07 56.878 +07 20 25.44 V C57
2021-12-14 20:03:54 s 1 -176316.22 3 +116212.13 1090.0 C57
2021-12-14 20:13:54 S 12 07 57.950 +07 20 17.77 V C57
2021-12-14 20:13:54 s 1 -176242.59 4 +115388.06 3710.0 C57
2021-12-14 20:23:54 S 12 07 59.237 +07 20 07.62 V C57
2021-12-14 20:23:54 s 1 -176166.71 2 +114562.52 6620.0 C57
2021-12-14 20:33:54 S 12 08 00.132 +07 19 59.27 V C57
2021-12-14 20:33:54 s 1 -176088.56 1 +113735.49 9760.0 C57
2021-12-14 20:43:54 S 12 08 01.056 +07 19 48.14 V C57
2021-12-14 20:43:54 s 1 -176008.12 9 +112906.99 3060.0 C57
2021-12-14 20:53:54 S 12 08 02.062 +07 19 39.18 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)