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
2021-12-08 14:13:55 s 1 +61236.541 0 +375654.81 1610.0 C57
2021-12-08 15:23:55 S 11 51 57.826 +09 44 34.87 V C57
2021-12-08 15:23:55 s 1 +58886.321 0 +376762.05 8570.0 C57
2021-12-08 15:33:55 S 11 51 59.126 +09 44 23.06 V C57
2021-12-08 15:33:55 s 1 +58549.938 0 +376916.38 4900.0 C57
2021-12-08 15:43:55 S 11 52 00.118 +09 44 17.92 V C57
2021-12-08 15:43:55 s 1 +58213.400 0 +377069.75 800.0 C57
2021-12-08 15:53:55 S 11 52 01.080 +09 44 08.12 V C57
2021-12-08 15:53:55 s 1 +57876.706 0 +377222.16 6260.0 C57
2021-12-08 16:03:55 S 11 52 02.026 +09 43 56.68 V C57
2021-12-08 16:03:55 s 1 +57539.858 0 +377373.60 1290.0 C57
2021-12-08 16:13:55 S 11 52 03.185 +09 43 49.80 V C57
2021-12-08 16:13:55 s 1 +57202.857 0 +377524.09 5890.0 C57
2021-12-08 16:23:55 S 11 52 04.507 +09 43 40.94 V C57
2021-12-08 16:23:55 s 1 +56865.703 0 +377673.62 70.0 C57
2021-12-08 16:43:55 S 11 52 06.538 +09 43 22.37 V C57
2021-12-08 16:43:55 s 1 +56190.943 0 +377969.80 7180.0 C57
2021-12-08 18:23:55 S 11 52 17.671 +09 41 48.55 V C57
2021-12-08 18:23:55 s 1 +52808.334 0 +379393.20 8630.0 C57
2021-12-08 18:33:55 S 11 52 18.754 +09 41 34.94 V C57
2021-12-08 18:33:55 s 1 +52469.288 0 +379530.28 7670.0 C57
2021-12-08 18:43:55 S 11 52 19.702 +09 41 29.72 V C57
2021-12-08 18:43:55 s 1 +52130.104 0 +379666.40 6330.0 C57
2021-12-08 18:53:55 S 11 52 21.233 +09 41 21.62 V C57
2021-12-08 18:53:55 s 1 +51790.781 0 +379801.57 4630.0 C57
2021-12-08 19:03:55 S 11 52 22.094 +09 41 08.92 V C57
2021-12-08 19:03:55 s 1 +51451.322 0 +379935.78 2570.0 C57
2021-12-08 19:23:55 S 11 52 24.271 +09 40 50.12 V C57
2021-12-08 19:23:55 s 1 +50771.997 0 +380201.34 7370.0 C57
2021-12-08 20:53:55 S 11 52 33.960 +09 39 26.93 V C57
2021-12-08 20:53:55 s 1 +47708.502 0 +381349.16 7140.0 C57
2021-12-08 21:03:55 S 11 52 35.270 +09 39 15.23 V C57
2021-12-08 21:03:55 s 1 +47367.473 0 +381471.94 1040.0 C57
2021-12-08 21:13:55 S 11 52 36.019 +09 39 07.06 V C57
2021-12-08 21:13:55 s 1 +47026.320 0 +381593.76 4630.0 C57
2021-12-08 21:23:55 S 11 52 37.217 +09 38 58.38 V C57
2021-12-08 21:23:55 s 1 +46685.042 0 +381714.63 7910.0 C57
2021-12-08 21:33:55 S 11 52 38.465 +09 38 47.62 V C57
2021-12-08 21:33:55 s 1 +46343.641 0 +381834.55 890.0 C57
2021-12-08 21:43:55 S 11 52 39.559 +09 38 41.50 V C57
2021-12-08 21:43:55 s 1 +46002.119 0 +381953.52 3570.0 C57
2021-12-08 21:53:55 S 11 52 40.512 +09 38 29.29 V C57
2021-12-08 21:53:55 s 1 +45660.475 0 +382071.53 5950.0 C57
2021-12-08 23:13:55 S 11 52 49.061 +09 37 14.16 V C57
2021-12-08 23:13:55 s 1 +42923.080 0 +382981.48 4760.0 C57
2021-12-08 23:23:55 S 11 52 50.549 +09 37 04.58 V C57
2021-12-08 23:23:55 s 1 +42580.389 0 +383090.96 4640.0 C57
2021-12-08 23:33:55 S 11 52 51.377 +09 36 55.37 V C57
2021-12-08 23:33:55 s 1 +42237.586 0 +383199.48 4260.0 C57
2021-12-08 23:43:55 S 11 52 52.742 +09 36 46.22 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)