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
2021-12-07 16:33:55 s 1 +103034.18 9 +346359.06 1990.0 C57
2021-12-07 16:43:55 S 11 49 28.337 +10 05 37.75 V C57
2021-12-07 16:43:55 s 1 +102729.40 5 +346649.09 9150.0 C57
2021-12-07 17:03:55 S 11 49 30.365 +10 05 20.76 V C57
2021-12-07 17:03:55 s 1 +102118.90 2 +347226.07 280.0 C57
2021-12-07 17:13:55 S 11 49 31.536 +10 05 07.19 V C57
2021-12-07 17:13:55 s 1 +101813.18 4 +347513.03 4270.0 C57
2021-12-07 18:23:55 S 11 49 39.072 +10 04 00.30 V C57
2021-12-07 18:23:55 s 1 +99664.596 0 +349493.03 3280.0 C57
2021-12-07 18:33:55 S 11 49 40.123 +10 03 54.86 V C57
2021-12-07 18:33:55 s 1 +99356.447 0 +349771.79 9060.0 C57
2021-12-07 18:43:55 S 11 49 41.635 +10 03 45.50 V C57
2021-12-07 18:43:55 s 1 +99048.000 0 +350049.54 3850.0 C57
2021-12-07 18:53:55 S 11 49 42.638 +10 03 35.57 V C57
2021-12-07 18:53:55 s 1 +98739.257 0 +350326.27 7630.0 C57
2021-12-07 19:03:55 S 11 49 43.706 +10 03 25.20 V C57
2021-12-07 19:03:55 s 1 +98430.218 0 +350601.98 430.0 C57
2021-12-07 19:23:55 S 11 49 46.078 +10 03 10.87 V C57
2021-12-07 19:23:55 s 1 +97811.260 0 +351150.34 3060.0 C57
2021-12-07 19:33:55 S 11 49 46.920 +10 02 57.08 V C57
2021-12-07 19:33:55 s 1 +97501.344 0 +351423.00 2910.0 C57
2021-12-07 19:43:55 S 11 49 48.235 +10 02 51.54 V C57
2021-12-07 19:43:55 s 1 +97191.137 0 +351694.64 1790.0 C57
2021-12-07 19:53:55 S 11 49 49.102 +10 02 43.48 V C57
2021-12-07 19:53:55 s 1 +96880.642 0 +351965.26 9700.0 C57
2021-12-07 21:13:55 S 11 49 58.260 +10 01 26.15 V C57
2021-12-07 21:13:55 s 1 +94386.436 0 +354093.76 8820.0 C57
2021-12-07 21:23:55 S 11 49 59.227 +10 01 18.66 V C57
2021-12-07 21:23:55 s 1 +94073.399 0 +354355.26 8260.0 C57
2021-12-07 21:33:55 S 11 50 00.319 +10 01 09.30 V C57
2021-12-07 21:33:55 s 1 +93760.086 0 +354615.76 6790.0 C57
2021-12-07 21:43:55 S 11 50 01.553 +10 01 02.17 V C57
2021-12-07 21:43:55 s 1 +93446.498 0 +354875.25 4400.0 C57
2021-12-07 21:53:55 S 11 50 02.318 +10 00 52.92 V C57
2021-12-07 21:53:55 s 1 +93132.637 0 +355133.73 1110.0 C57
2021-12-07 23:43:55 S 11 50 14.659 +09 59 03.52 V C57
2021-12-07 23:43:55 s 1 +89662.462 0 +357910.60 6470.0 C57
2021-12-07 23:53:55 S 11 50 15.571 +09 58 56.39 V C57
2021-12-07 23:53:55 s 1 +89345.414 0 +358157.02 2690.0 C57
2021-12-08 00:03:55 S 11 50 16.759 +09 58 49.91 V C57
2021-12-08 00:03:55 s 1 +89028.108 0 +358402.44 8050.0 C57
2021-12-08 00:13:55 S 11 50 17.887 +09 58 38.60 V C57
2021-12-08 00:13:55 s 1 +88710.547 0 +358646.86 2580.0 C57
2021-12-08 00:23:55 S 11 50 19.090 +09 58 30.72 V C57
2021-12-08 00:23:55 s 1 +88392.730 0 +358890.27 6280.0 C57
2021-12-08 00:33:55 S 11 50 19.961 +09 58 21.79 V C57
2021-12-08 00:33:55 s 1 +88074.659 0 +359132.69 9150.0 C57
2021-12-08 00:43:55 S 11 50 21.185 +09 58 12.18 V C57
2021-12-08 00:43:55 s 1 +87756.335 0 +359374.11 1190.0 C57
2021-12-08 00:53:55 S 11 50 22.243 +09 58 00.80 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)