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
2021-12-05 09:33:55 s 1 +174750.60 3 +188857.82 5760.0 C57
2021-12-05 09:43:55 S 11 43 21.221 +10 55 23.84 V C57
2021-12-05 09:43:55 s 1 +174672.95 2 +189543.80 3110.0 C57
2021-12-05 09:53:55 S 11 43 22.046 +10 55 13.62 V C57
2021-12-05 09:53:55 s 1 +174593.96 4 +190228.34 5430.0 C57
2021-12-05 10:03:55 S 11 43 23.592 +10 55 07.68 V C57
2021-12-05 10:03:55 s 1 +174513.64 4 +190911.45 2750.0 C57
2021-12-05 10:13:55 S 11 43 24.449 +10 54 56.23 V C57
2021-12-05 10:13:55 s 1 +174432.00 1 +191593.12 5100.0 C57
2021-12-05 11:53:55 S 11 43 35.779 +10 53 29.98 V C57
2021-12-05 11:53:55 s 1 +173544.24 6 +198331.32 760.0 C57
2021-12-05 12:03:55 S 11 43 36.785 +10 53 15.76 V C57
2021-12-05 12:03:55 s 1 +173448.48 4 +198997.33 120.0 C57
2021-12-05 12:13:55 S 11 43 37.668 +10 53 09.78 V C57
2021-12-05 12:13:55 s 1 +173351.47 7 +199661.92 4810.0 C57
2021-12-05 12:23:55 S 11 43 39.098 +10 52 59.09 V C57
2021-12-05 12:23:55 s 1 +173253.23 3 +200325.10 4850.0 C57
2021-12-05 12:33:55 S 11 43 40.229 +10 52 48.90 V C57
2021-12-05 12:33:55 s 1 +173153.75 7 +200986.87 280.0 C57
2021-12-05 14:23:55 S 11 43 52.426 +10 51 14.87 V C57
2021-12-05 14:23:55 s 1 +171979.98 4 +208173.79 2110.0 C57
2021-12-05 14:33:55 S 11 43 53.808 +10 51 05.00 V C57
2021-12-05 14:33:55 s 1 +171866.20 3 +208818.78 3990.0 C57
2021-12-05 14:43:55 S 11 43 54.797 +10 50 55.32 V C57
2021-12-05 14:43:55 s 1 +171751.26 8 +209462.38 1540.0 C57
2021-12-05 15:03:55 S 11 43 57.058 +10 50 36.38 V C57
2021-12-05 15:03:55 s 1 +171517.95 9 +210745.42 3800.0 C57
2021-12-05 15:13:55 S 11 43 57.922 +10 50 33.18 V C57
2021-12-05 15:13:55 s 1 +171399.59 7 +211384.87 8550.0 C57
2021-12-05 15:33:55 S 11 44 00.458 +10 50 13.49 V C57
2021-12-05 15:33:55 s 1 +171159.48 4 +212659.62 5380.0 C57
2021-12-05 15:43:55 S 11 44 01.409 +10 50 02.04 V C57
2021-12-05 15:43:55 s 1 +171037.74 5 +213294.94 7510.0 C57
2021-12-05 15:53:55 S 11 44 02.635 +10 49 55.34 V C57
2021-12-05 15:53:55 s 1 +170914.89 2 +213928.87 5470.0 C57
2021-12-05 16:53:55 S 11 44 09.449 +10 49 03.29 V C57
2021-12-05 16:53:55 s 1 +170154.66 9 +217703.71 7020.0 C57
2021-12-05 17:03:55 S 11 44 10.577 +10 48 50.00 V C57
2021-12-05 17:03:55 s 1 +170024.16 5 +218328.07 6430.0 C57
2021-12-05 17:13:55 S 11 44 11.676 +10 48 41.94 V C57
2021-12-05 17:13:55 s 1 +169892.58 9 +218951.07 1850.0 C57
2021-12-05 17:33:55 S 11 44 13.692 +10 48 24.19 V C57
2021-12-05 17:33:55 s 1 +169626.24 2 +220192.98 760.0 C57
2021-12-05 17:43:55 S 11 44 14.923 +10 48 18.18 V C57
2021-12-05 17:43:55 s 1 +169491.48 1 +220811.91 4300.0 C57
2021-12-05 19:43:55 S 11 44 28.673 +10 46 28.56 V C57
2021-12-05 19:43:55 s 1 +167793.77 0 +228133.81 6650.0 C57
2021-12-05 19:53:55 S 11 44 29.590 +10 46 16.97 V C57
2021-12-05 19:53:55 s 1 +167645.72 6 +228735.25 750.0 C57
2021-12-05 20:23:55 S 11 44 32.842 +10 45 50.26 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)