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
2021-12-21 03:43:55 s 1 +114672.50 2 +332576.08 8480.0 C57
2021-12-21 03:53:55 S 12 25 33.578 +04 43 36.01 V C57
2021-12-21 03:53:55 s 1 +114373.74 2 +332911.66 6650.0 C57
2021-12-21 03:59:51 C 12 25 03.85 +04 42 48.7 X K87
2021-12-21 04:03:55 S 12 25 34.541 +04 43 26.94 V C57
2021-12-21 04:03:55 s 1 +114074.60 2 +333246.17 3500.0 C57
2021-12-21 04:06:11 C 12 25 04.59 +04 42 41.9 X K87
2021-12-21 04:12:31 C 12 25 05.31 +04 42 34.8 X K87
2021-12-21 04:13:54 S 12 25 35.724 +04 43 15.82 V C57
2021-12-21 04:13:54 s 1 +113775.08 4 +333579.60 9020.0 C57
2021-12-21 04:23:55 S 12 25 36.958 +04 43 05.45 V C57
2021-12-21 04:23:55 s 1 +113475.18 9 +333911.95 3230.0 C57
2021-12-21 04:33:55 S 12 25 38.460 +04 42 48.85 V C57
2021-12-21 04:33:55 s 1 +113174.91 9 +334243.22 6130.0 C57
2021-12-21 04:43:55 S 12 25 39.278 +04 42 44.28 V C57
2021-12-21 04:43:55 s 1 +112874.27 6 +334573.42 7720.0 C57
2021-12-21 04:53:55 S 12 25 40.606 +04 42 31.86 V C57
2021-12-21 04:53:55 s 1 +112573.26 1 +334902.55 8020.0 C57
2021-12-21 05:03:55 S 12 25 41.724 +04 42 21.89 V C57
2021-12-21 05:03:55 s 1 +112271.87 6 +335230.60 7030.0 C57
2021-12-21 06:03:55 S 12 25 49.075 +04 41 11.51 V C57
2021-12-21 06:03:55 s 1 +110455.87 8 +337176.39 4370.0 C57
2021-12-21 06:13:55 S 12 25 50.194 +04 41 02.22 V C57
2021-12-21 06:13:55 s 1 +110151.94 5 +337496.94 4530.0 C57
2021-12-21 06:23:55 S 12 25 51.446 +04 40 51.17 V C57
2021-12-21 06:23:55 s 1 +109847.65 5 +337816.42 3460.0 C57
2021-12-21 06:33:55 S 12 25 52.548 +04 40 39.07 V C57
2021-12-21 06:33:55 s 1 +109543.00 8 +338134.84 1150.0 C57
2021-12-21 06:43:55 S 12 25 53.695 +04 40 29.96 V C57
2021-12-21 06:43:55 s 1 +109238.00 7 +338452.19 7610.0 C57
2021-12-21 06:53:54 S 12 25 55.037 +04 40 18.88 V C57
2021-12-21 06:53:54 s 1 +108932.65 3 +338768.48 2860.0 C57
2021-12-21 07:03:55 S 12 25 56.254 +04 40 05.48 V C57
2021-12-21 07:03:55 s 1 +108626.94 7 +339083.70 6890.0 C57
2021-12-21 07:13:54 S 12 25 57.394 +04 39 56.48 V C57
2021-12-21 07:13:54 s 1 +108320.89 2 +339397.85 9710.0 C57
2021-12-21 07:23:55 S 12 25 58.613 +04 39 45.25 V C57
2021-12-21 07:23:55 s 1 +108014.48 7 +339710.94 1340.0 C57
2021-12-21 07:33:55 S 12 25 59.726 +04 39 36.79 V C57
2021-12-21 07:33:55 s 1 +107707.73 6 +340022.97 1760.0 C57
2021-12-21 07:43:55 S 12 26 00.562 +04 39 24.01 V C57
2021-12-21 07:43:55 s 1 +107400.63 9 +340333.94 1000.0 C57
2021-12-21 08:43:54 S 12 26 08.208 +04 38 17.66 V C57
2021-12-21 08:43:54 s 1 +105550.88 8 +342177.46 1800.0 C57
2021-12-21 08:53:55 S 12 26 09.506 +04 38 05.64 V C57
2021-12-21 08:53:55 s 1 +105241.41 4 +342481.01 2890.0 C57
2021-12-21 09:03:55 S 12 26 10.543 +04 37 54.44 V C57
2021-12-21 09:03:55 s 1 +104931.60 8 +342783.50 2830.0 C57
2021-12-21 09:13:55 S 12 26 11.830 +04 37 42.96 V C57
2021-12-21 09:13:55 s 1 +104621.46 9 +343084.93 1640.0 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)