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
2021-12-18 21:43:55 s 1 +177887.33 4 +161169.65 2720.0 C57
2021-12-18 23:33:55 S 12 19 15.089 +05 40 28.45 V C57
2021-12-18 23:33:55 s 1 +177481.02 4 +169268.19 8680.0 C57
2021-12-18 23:43:55 S 12 19 16.380 +05 40 15.64 V C57
2021-12-18 23:43:55 s 1 +177434.60 9 +169995.59 1250.0 C57
2021-12-18 23:53:55 S 12 19 17.630 +05 40 06.42 V C57
2021-12-18 23:53:55 s 1 +177386.65 2 +170721.51 7790.0 C57
2021-12-19 00:03:55 S 12 19 18.794 +05 39 56.52 V C57
2021-12-19 00:03:55 s 1 +177337.16 0 +171445.98 8340.0 C57
2021-12-19 00:13:55 S 12 19 19.922 +05 39 44.96 V C57
2021-12-19 00:13:55 s 1 +177286.14 1 +172168.98 2930.0 C57
2021-12-19 00:23:55 S 12 19 21.175 +05 39 33.98 V C57
2021-12-19 00:23:55 s 1 +177233.60 5 +172890.52 1600.0 C57
2021-12-19 00:43:55 S 12 19 23.858 +05 39 13.10 V C57
2021-12-19 00:43:55 s 1 +177124.01 2 +174329.21 1280.0 C57
2021-12-19 02:13:55 S 12 19 34.442 +05 37 30.68 V C57
2021-12-19 02:13:55 s 1 +176557.80 4 +180731.29 5050.0 C57
2021-12-19 02:23:55 S 12 19 35.657 +05 37 22.73 V C57
2021-12-19 02:23:55 s 1 +176487.67 0 +181435.38 5110.0 C57
2021-12-19 02:33:55 S 12 19 36.902 +05 37 12.47 V C57
2021-12-19 02:33:55 s 1 +176416.11 8 +182138.03 9660.0 C57
2021-12-19 02:43:55 S 12 19 37.978 +05 37 02.89 V C57
2021-12-19 02:43:55 s 1 +176343.15 7 +182839.24 8710.0 C57
2021-12-19 02:53:55 S 12 19 39.211 +05 36 51.70 V C57
2021-12-19 02:53:55 s 1 +176268.79 4 +183539.00 2320.0 C57
2021-12-19 07:23:55 S 12 20 12.067 +05 32 06.25 V C57
2021-12-19 07:23:55 s 1 +173756.46 8 +201893.20 750.0 C57
2021-12-19 07:43:55 S 12 20 14.609 +05 31 44.33 V C57
2021-12-19 07:43:55 s 1 +173533.57 8 +203211.82 340.0 C57
2021-12-19 08:23:55 S 12 20 19.270 +05 31 00.98 V C57
2021-12-19 08:23:55 s 1 +173073.39 9 +205832.33 3880.0 C57
2021-12-19 09:43:55 S 12 20 28.985 +05 29 29.72 V C57
2021-12-19 09:43:55 s 1 +172096.73 9 +211006.72 3660.0 C57
2021-12-19 09:53:55 S 12 20 30.218 +05 29 20.83 V C57
2021-12-19 09:53:55 s 1 +171969.48 9 +211647.30 2460.0 C57
2021-12-19 10:03:55 S 12 20 31.308 +05 29 13.34 V C57
2021-12-19 10:03:55 s 1 +171841.10 9 +212286.51 6910.0 C57
2021-12-19 10:13:55 S 12 20 32.470 +05 29 00.60 V C57
2021-12-19 10:13:55 s 1 +171711.60 5 +212924.34 7030.0 C57
2021-12-19 10:33:55 S 12 20 34.999 +05 28 41.34 V C57
2021-12-19 10:33:55 s 1 +171449.24 6 +214195.89 4350.0 C57
2021-12-19 10:43:55 S 12 20 36.106 +05 28 29.46 V C57
2021-12-19 10:43:55 s 1 +171316.40 1 +214829.61 1610.0 C57
2021-12-19 10:53:55 S 12 20 37.574 +05 28 22.91 V C57
2021-12-19 10:53:55 s 1 +171182.45 3 +215461.96 4620.0 C57
2021-12-19 11:03:55 S 12 20 38.849 +05 28 08.33 V C57
2021-12-19 11:03:55 s 1 +171047.40 8 +216092.94 3410.0 C57
2021-12-19 12:33:55 S 12 20 49.723 +05 26 32.14 V C57
2021-12-19 12:33:55 s 1 +169783.46 1 +221710.54 5930.0 C57
2021-12-19 12:43:55 S 12 20 50.789 +05 26 21.59 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)