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
2021-11-18 10:53:56 S 11 00 35.354 +16 21 37.40 V C57
2021-11-18 10:53:56 s 1 -161840.52 0 +72080.871 100.0 C57
2021-11-18 12:33:56 S 11 00 44.777 +16 20 24.32 V C57
2021-11-18 12:33:56 s 1 -159517.79 5 +62699.815 3150.0 C57
2021-11-18 12:53:56 S 11 00 47.100 +16 20 10.28 V C57
2021-11-18 12:53:56 s 1 -159008.46 2 +60805.321 9280.0 C57
2021-11-18 15:13:56 S 11 01 00.358 +16 18 25.42 V C57
2021-11-18 15:13:56 s 1 -154994.65 6 +47381.761 9230.0 C57
2021-11-18 15:23:56 S 11 01 01.570 +16 18 17.06 V C57
2021-11-18 15:23:56 s 1 -154676.50 5 +46412.539 1320.0 C57
2021-11-18 15:53:56 S 11 01 04.085 +16 17 53.70 V C57
2021-11-18 15:53:56 s 1 -153695.61 2 +43497.006 7500.0 C57
2021-11-18 16:03:56 S 11 01 05.167 +16 17 48.88 V C57
2021-11-18 16:03:56 s 1 -153359.71 1 +42522.588 2390.0 C57
2021-11-18 16:13:56 S 11 01 05.830 +16 17 43.98 V C57
2021-11-18 16:13:56 s 1 -153019.27 8 +41546.908 150.0 C57
2021-11-18 17:53:56 S 11 01 15.814 +16 16 29.57 V C57
2021-11-18 17:53:56 s 1 -149357.08 3 +31724.397 3250.0 C57
2021-11-18 18:03:56 S 11 01 16.730 +16 16 20.06 V C57
2021-11-18 18:03:56 s 1 -148964.18 4 +30735.979 2860.0 C57
2021-11-18 18:13:56 S 11 01 17.974 +16 16 12.83 V C57
2021-11-18 18:13:56 s 1 -148566.26 7 +29746.520 3550.0 C57
2021-11-18 18:33:56 S 11 01 19.726 +16 16 00.95 V C57
2021-11-18 18:33:56 s 1 -147755.20 2 +27764.567 7530.0 C57
2021-11-18 18:43:56 S 11 01 20.868 +16 15 52.24 V C57
2021-11-18 18:43:56 s 1 -147341.96 7 +26772.120 500.0 C57
2021-11-18 18:53:56 S 11 01 21.418 +16 15 45.90 V C57
2021-11-18 18:53:56 s 1 -146923.53 7 +25778.723 3910.0 C57
2021-11-18 20:13:56 S 11 01 29.462 +16 14 46.82 V C57
2021-11-18 20:13:56 s 1 -143383.59 4 +17800.466 7010.0 C57
2021-11-18 20:23:56 S 11 01 30.266 +16 14 42.25 V C57
2021-11-18 20:23:56 s 1 -142916.33 1 +16799.715 6820.0 C57
2021-11-18 20:53:56 S 11 01 33.326 +16 14 15.97 V C57
2021-11-18 20:53:56 s 1 -141480.35 1 +13793.563 7920.0 C57
2021-11-18 21:03:56 S 11 01 34.186 +16 14 07.84 V C57
2021-11-18 21:03:56 s 1 -140990.12 7 +12790.323 1570.0 C57
2021-11-18 21:13:56 S 11 01 35.525 +16 14 04.34 V C57
2021-11-18 21:13:56 s 1 -140494.03 7 +11786.546 3230.0 C57
2021-11-18 21:33:56 S 11 01 36.907 +16 13 52.93 V C57
2021-11-18 21:33:56 s 1 -139484.05 0 + 9777.521 9830.0 C57
2021-11-18 22:43:56 S 11 01 43.901 +16 12 58.25 V C57
2021-11-18 22:43:56 s 1 -135756.60 0 + 2734.580 7410.0 C57
2021-11-18 22:53:56 S 11 01 45.115 +16 12 53.03 V C57
2021-11-18 22:53:56 s 1 -135198.94 4 + 1727.558 8700.0 C57
2021-11-18 23:23:56 S 11 01 47.954 +16 12 31.07 V C57
2021-11-18 23:23:56 s 1 -133487.01 2 - 1293.842 7100.0 C57
2021-11-18 23:33:56 S 11 01 48.761 +16 12 16.02 V C57
2021-11-18 23:33:56 s 1 -132903.19 2 - 2300.923 730.0 C57
2021-11-18 23:43:56 S 11 01 49.716 +16 12 09.90 V C57
2021-11-18 23:43:56 s 1 -132312.68 8 - 3307.895 9430.0 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)