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
2021-11-15 21:53:56 S 10 54 36.185 +17 05 54.89 V C57
2021-11-15 21:53:56 s 1 -119381.81 4 +308231.46 9120.0 C57
2021-11-15 22:03:56 S 10 54 36.766 +17 05 40.16 V C57
2021-11-15 22:03:56 s 1 -119666.69 3 +307836.58 2460.0 C57
2021-11-15 22:23:56 S 10 54 39.024 +17 05 29.29 V C57
2021-11-15 22:23:56 s 1 -120235.06 2 +307043.24 3390.0 C57
2021-11-15 22:33:56 S 10 54 40.190 +17 05 22.52 V C57
2021-11-15 22:33:56 s 1 -120518.54 8 +306644.79 960.0 C57
2021-11-15 22:43:56 S 10 54 40.858 +17 05 16.66 V C57
2021-11-15 22:43:56 s 1 -120801.56 7 +306245.14 6590.0 C57
2021-11-15 22:53:56 S 10 54 42.319 +17 05 11.26 V C57
2021-11-15 22:53:56 s 1 -121084.11 5 +305844.30 270.0 C57
2021-11-16 00:53:56 S 10 54 53.887 +17 03 42.55 V C57
2021-11-16 00:53:56 s 1 -124437.19 5 +300940.68 9370.0 C57
2021-11-16 01:03:56 S 10 54 54.715 +17 03 38.84 V C57
2021-11-16 01:03:56 s 1 -124713.42 7 +300524.21 6950.0 C57
2021-11-16 01:13:56 S 10 54 55.514 +17 03 23.98 V C57
2021-11-16 01:13:56 s 1 -124989.15 6 +300106.54 2450.0 C57
2021-11-16 03:13:56 S 10 55 07.937 +17 02 04.31 V C57
2021-11-16 03:13:56 s 1 -128257.92 8 +294999.58 3810.0 C57
2021-11-16 03:23:56 S 10 55 08.364 +17 01 54.34 V C57
2021-11-16 03:23:56 s 1 -128526.92 1 +294566.06 1590.0 C57
2021-11-16 03:33:56 S 10 55 09.679 +17 01 46.85 V C57
2021-11-16 03:33:56 s 1 -128795.38 0 +294131.31 7170.0 C57
2021-11-16 04:03:56 S 10 55 12.701 +17 01 23.77 V C57
2021-11-16 04:03:56 s 1 -129597.52 1 +292819.69 620.0 C57
2021-11-16 05:43:56 S 10 55 22.512 +17 00 17.46 V C57
2021-11-16 05:43:56 s 1 -132235.52 0 +288367.29 5300.0 C57
2021-11-16 08:23:56 S 10 55 38.671 +16 58 24.06 V C57
2021-11-16 08:23:56 s 1 -136336.50 7 +280983.77 8720.0 C57
2021-11-16 08:33:56 S 10 55 39.214 +16 58 14.92 V C57
2021-11-16 08:33:56 s 1 -136587.71 6 +280511.58 3730.0 C57
2021-11-16 08:43:56 S 10 55 40.370 +16 58 01.96 V C57
2021-11-16 08:43:56 s 1 -136838.30 7 +280038.12 6230.0 C57
2021-11-16 08:53:56 S 10 55 41.650 +16 57 59.51 V C57
2021-11-16 08:53:56 s 1 -137088.27 9 +279563.40 6200.0 C57
2021-11-16 09:03:56 S 10 55 42.487 +16 57 52.13 V C57
2021-11-16 09:03:56 s 1 -137337.62 8 +279087.40 3640.0 C57
2021-11-16 09:13:56 S 10 55 43.378 +16 57 39.60 V C57
2021-11-16 09:13:56 s 1 -137586.35 1 +278610.13 8530.0 C57
2021-11-16 09:23:56 S 10 55 44.398 +16 57 37.30 V C57
2021-11-16 09:23:56 s 1 -137834.44 5 +278131.58 860.0 C57
2021-11-16 10:53:56 S 10 55 53.623 +16 56 29.15 V C57
2021-11-16 10:53:56 s 1 -140038.51 6 +273767.06 4810.0 C57
2021-11-16 11:03:56 S 10 55 54.228 +16 56 21.66 V C57
2021-11-16 11:03:56 s 1 -140280.16 1 +273275.69 930.0 C57
2021-11-16 11:13:56 S 10 55 55.495 +16 56 18.74 V C57
2021-11-16 11:13:56 s 1 -140521.14 3 +272783.03 4350.0 C57
2021-11-16 11:23:56 S 10 55 56.659 +16 56 02.62 V C57
2021-11-16 11:23:56 s 1 -140761.46 1 +272289.07 5080.0 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)