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 10:33:54 s 1 -159639.00 0 +39247.670 4760.0 C57
2021-12-15 11:33:54 S 12 09 33.490 +07 04 58.69 V C57
2021-12-15 11:33:54 s 1 -157539.22 5 +33591.879 2540.0 C57
2021-12-15 11:53:54 S 12 09 35.563 +07 04 42.82 V C57
2021-12-15 11:53:54 s 1 -156805.34 7 +31699.111 6050.0 C57
2021-12-15 12:03:54 S 12 09 36.540 +07 04 31.58 V C57
2021-12-15 12:03:54 s 1 -156431.89 5 +30751.395 5510.0 C57
2021-12-15 12:13:54 S 12 09 37.721 +07 04 21.86 V C57
2021-12-15 12:13:54 s 1 -156054.05 6 +29802.814 6600.0 C57
2021-12-15 12:23:54 S 12 09 38.630 +07 04 15.89 V C57
2021-12-15 12:23:54 s 1 -155671.79 7 +28853.387 9180.0 C57
2021-12-15 12:33:54 S 12 09 39.638 +07 04 02.93 V C57
2021-12-15 12:33:54 s 1 -155285.08 3 +27903.130 3120.0 C57
2021-12-15 12:43:54 S 12 09 40.870 +07 03 54.86 V C57
2021-12-15 12:43:54 s 1 -154893.88 0 +26952.065 8270.0 C57
2021-12-15 12:53:54 S 12 09 41.782 +07 03 45.68 V C57
2021-12-15 12:53:54 s 1 -154498.15 3 +26000.210 4510.0 C57
2021-12-15 13:03:54 S 12 09 42.600 +07 03 32.87 V C57
2021-12-15 13:03:54 s 1 -154097.86 7 +25047.585 1690.0 C57
2021-12-15 13:13:54 S 12 09 43.762 +07 03 24.23 V C57
2021-12-15 13:13:54 s 1 -153692.98 7 +24094.210 9670.0 C57
2021-12-15 13:33:54 S 12 09 46.166 +07 03 07.02 V C57
2021-12-15 13:33:54 s 1 -152869.30 2 +22185.297 7470.0 C57
2021-12-15 14:33:54 S 12 09 52.154 +07 02 01.18 V C57
2021-12-15 14:33:54 s 1 -150284.21 4 +16442.855 5140.0 C57
2021-12-15 14:43:54 S 12 09 53.196 +07 01 56.57 V C57
2021-12-15 14:43:54 s 1 -149836.34 6 +15483.741 3820.0 C57
2021-12-15 14:53:54 S 12 09 54.019 +07 01 46.02 V C57
2021-12-15 14:53:54 s 1 -149383.51 2 +14524.111 1840.0 C57
2021-12-15 15:03:54 S 12 09 55.195 +07 01 34.25 V C57
2021-12-15 15:03:54 s 1 -148925.67 5 +13563.991 9030.0 C57
2021-12-15 15:13:54 S 12 09 56.282 +07 01 25.43 V C57
2021-12-15 15:13:54 s 1 -148462.79 5 +12603.410 5260.0 C57
2021-12-15 15:23:54 S 12 09 57.307 +07 01 15.17 V C57
2021-12-15 15:23:54 s 1 -147994.83 4 +11642.394 350.0 C57
2021-12-15 15:33:54 S 12 09 58.339 +07 01 04.44 V C57
2021-12-15 15:33:54 s 1 -147521.75 1 +10680.972 4160.0 C57
2021-12-15 15:43:54 S 12 09 59.227 +07 00 54.04 V C57
2021-12-15 15:43:54 s 1 -147043.50 6 + 9719.173 6530.0 C57
2021-12-15 17:13:54 S 12 10 08.952 +06 59 22.85 V C57
2021-12-15 17:13:54 s 1 -142500.26 6 + 1051.206 6360.0 C57
2021-12-15 17:23:54 S 12 10 09.449 +06 59 14.10 V C57
2021-12-15 17:23:54 s 1 -141968.13 4 + 87.406 5400.0 C57
2021-12-15 17:33:54 S 12 10 10.596 +06 59 06.86 V C57
2021-12-15 17:33:54 s 1 -141430.38 0 - 876.401 1190.0 C57
2021-12-15 17:43:54 S 12 10 11.695 +06 58 55.78 V C57
2021-12-15 17:43:54 s 1 -140886.96 0 - 1840.176 3570.0 C57
2021-12-15 17:53:54 S 12 10 12.787 +06 58 47.57 V C57
2021-12-15 17:53:54 s 1 -140337.83 0 - 2803.880 2350.0 C57
2021-12-15 18:03:54 S 12 10 13.932 +06 58 33.42 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)