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
2021-12-19 19:03:55 s 1 +163370.19 2 +244802.61 5760.0 C57
2021-12-19 20:33:55 S 12 21 47.506 +05 17 53.66 V C57
2021-12-19 20:33:55 s 1 +161692.24 9 +249848.98 6810.0 C57
2021-12-19 20:43:55 S 12 21 48.432 +05 17 43.73 V C57
2021-12-19 20:43:55 s 1 +161501.55 9 +250403.26 3020.0 C57
2021-12-19 20:53:55 S 12 21 49.908 +05 17 30.95 V C57
2021-12-19 20:53:55 s 1 +161310.03 2 +250956.27 6060.0 C57
2021-12-19 21:03:55 S 12 21 51.118 +05 17 23.60 V C57
2021-12-19 21:03:55 s 1 +161117.67 3 +251508.00 5940.0 C57
2021-12-19 21:13:55 S 12 21 52.310 +05 17 11.29 V C57
2021-12-19 21:13:55 s 1 +160924.48 4 +252058.45 2690.0 C57
2021-12-19 21:23:55 S 12 21 53.556 +05 16 59.23 V C57
2021-12-19 21:23:55 s 1 +160730.47 0 +252607.62 6300.0 C57
2021-12-19 21:33:55 S 12 21 54.473 +05 16 50.70 V C57
2021-12-19 21:33:55 s 1 +160535.63 3 +253155.53 6810.0 C57
2021-12-19 21:43:55 S 12 21 55.805 +05 16 40.48 V C57
2021-12-19 21:43:55 s 1 +160339.97 9 +253702.16 4220.0 C57
2021-12-19 21:53:55 S 12 21 57.055 +05 16 24.85 V C57
2021-12-19 21:53:55 s 1 +160143.50 9 +254247.51 8540.0 C57
2021-12-19 22:03:55 S 12 21 58.202 +05 16 18.48 V C57
2021-12-19 22:03:55 s 1 +159946.22 9 +254791.60 9800.0 C57
2021-12-19 22:53:55 S 12 22 04.397 +05 15 24.59 V C57
2021-12-19 22:53:55 s 1 +158947.78 4 +257493.05 570.0 C57
2021-12-19 23:03:55 S 12 22 05.544 +05 15 10.33 V C57
2021-12-19 23:03:55 s 1 +158745.71 1 +258029.55 3720.0 C57
2021-12-19 23:13:55 S 12 22 06.689 +05 15 02.66 V C57
2021-12-19 23:13:55 s 1 +158542.85 1 +258564.78 3900.0 C57
2021-12-19 23:23:55 S 12 22 07.858 +05 14 51.14 V C57
2021-12-19 23:23:55 s 1 +158339.20 8 +259098.76 1120.0 C57
2021-12-19 23:33:55 S 12 22 09.031 +05 14 38.40 V C57
2021-12-19 23:33:55 s 1 +158134.78 5 +259631.49 5400.0 C57
2021-12-19 23:43:55 S 12 22 10.476 +05 14 27.28 V C57
2021-12-19 23:43:55 s 1 +157929.58 6 +260162.95 6760.0 C57
2021-12-19 23:53:55 S 12 22 11.546 +05 14 19.21 V C57
2021-12-19 23:53:55 s 1 +157723.61 4 +260693.16 5200.0 C57
2021-12-20 00:03:55 S 12 22 12.814 +05 14 07.48 V C57
2021-12-20 00:03:55 s 1 +157516.87 3 +261222.12 730.0 C57
2021-12-20 00:13:55 S 12 22 13.882 +05 13 56.35 V C57
2021-12-20 00:13:55 s 1 +157309.36 5 +261749.83 3390.0 C57
2021-12-20 01:23:55 S 12 22 22.668 +05 12 40.32 V C57
2021-12-20 01:23:55 s 1 +155835.63 0 +265408.82 2210.0 C57
2021-12-20 01:33:55 S 12 22 23.724 +05 12 28.26 V C57
2021-12-20 01:33:55 s 1 +155622.11 0 +265926.56 2240.0 C57
2021-12-20 01:43:55 S 12 22 24.701 +05 12 21.13 V C57
2021-12-20 01:43:55 s 1 +155407.85 3 +266443.06 9500.0 C57
2021-12-20 01:53:55 S 12 22 26.078 +05 12 04.61 V C57
2021-12-20 01:53:55 s 1 +155192.86 2 +266958.32 4000.0 C57
2021-12-20 02:03:55 S 12 22 27.173 +05 11 55.90 V C57
2021-12-20 02:03:55 s 1 +154977.14 1 +267472.34 5750.0 C57
2021-12-20 02:13:55 S 12 22 28.488 +05 11 44.77 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)