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
2021-11-28 18:33:55 s 1 -106598.32 7 +324386.45 9230.0 C57
2021-11-28 18:43:55 S 11 26 38.688 +13 09 57.92 V C57
2021-11-28 18:43:55 s 1 -106898.72 0 +324037.54 6250.0 C57
2021-11-28 18:53:55 S 11 26 39.490 +13 09 46.04 V C57
2021-11-28 18:53:55 s 1 -107198.72 9 +323687.49 1560.0 C57
2021-11-28 19:03:55 S 11 26 40.620 +13 09 43.70 V C57
2021-11-28 19:03:55 s 1 -107498.35 2 +323336.30 5160.0 C57
2021-11-28 19:23:55 S 11 26 42.866 +13 09 20.95 V C57
2021-11-28 19:23:55 s 1 -108096.43 0 +322630.49 7210.0 C57
2021-11-28 20:33:55 S 11 26 49.810 +13 08 30.73 V C57
2021-11-28 20:33:55 s 1 -110177.26 9 +320124.08 9380.0 C57
2021-11-28 20:43:55 S 11 26 50.602 +13 08 18.96 V C57
2021-11-28 20:43:55 s 1 -110472.92 8 +319761.43 5470.0 C57
2021-11-28 20:53:55 S 11 26 52.130 +13 08 11.26 V C57
2021-11-28 20:53:55 s 1 -110768.18 1 +319397.62 9760.0 C57
2021-11-28 21:03:55 S 11 26 52.889 +13 08 00.85 V C57
2021-11-28 21:03:55 s 1 -111063.02 5 +319032.67 2260.0 C57
2021-11-28 21:23:55 S 11 26 55.198 +13 07 45.84 V C57
2021-11-28 21:23:55 s 1 -111651.48 2 +318299.29 1820.0 C57
2021-11-28 21:33:55 S 11 26 55.812 +13 07 36.95 V C57
2021-11-28 21:33:55 s 1 -111945.09 0 +317930.87 8860.0 C57
2021-11-28 21:53:55 S 11 26 57.586 +13 07 20.60 V C57
2021-11-28 21:53:55 s 1 -112531.05 8 +317190.56 7460.0 C57
2021-11-28 23:33:55 S 11 27 08.050 +13 05 56.08 V C57
2021-11-28 23:33:55 s 1 -115435.40 9 +313419.31 8390.0 C57
2021-11-28 23:43:55 S 11 27 09.094 +13 05 49.81 V C57
2021-11-28 23:43:55 s 1 -115723.46 1 +313035.77 1020.0 C57
2021-11-29 01:43:55 S 11 27 21.014 +13 04 10.96 V C57
2021-11-29 01:43:55 s 1 -119145.10 1 +308341.76 9380.0 C57
2021-11-29 01:53:55 S 11 27 22.615 +13 03 57.64 V C57
2021-11-29 01:53:55 s 1 -119427.26 0 +307942.93 6230.0 C57
2021-11-29 02:13:55 S 11 27 24.348 +13 03 45.58 V C57
2021-11-29 02:13:55 s 1 -119990.17 2 +307141.71 3770.0 C57
2021-11-29 02:53:55 S 11 27 28.339 +13 03 15.91 V C57
2021-11-29 02:53:55 s 1 -121110.31 3 +305525.02 4070.0 C57
2021-11-29 04:23:55 S 11 27 37.817 +13 01 54.37 V C57
2021-11-29 04:23:55 s 1 -123602.29 4 +301817.70 8780.0 C57
2021-11-29 04:53:55 S 11 27 40.560 +13 01 32.99 V C57
2021-11-29 04:53:55 s 1 -124424.02 4 +300560.34 1500.0 C57
2021-11-29 05:03:55 S 11 27 41.750 +13 01 28.31 V C57
2021-11-29 05:03:55 s 1 -124696.92 2 +300138.81 8010.0 C57
2021-11-29 05:13:55 S 11 27 42.773 +13 01 17.08 V C57
2021-11-29 05:13:55 s 1 -124969.31 0 +299716.07 2310.0 C57
2021-11-29 05:33:55 S 11 27 44.892 +13 01 00.77 V C57
2021-11-29 05:33:55 s 1 -125512.54 8 +298866.98 4220.0 C57
2021-11-29 07:03:55 S 11 27 54.084 +12 59 44.77 V C57
2021-11-29 07:03:55 s 1 -127931.27 1 +294986.02 750.0 C57
2021-11-29 07:13:55 S 11 27 54.905 +12 59 36.38 V C57
2021-11-29 07:13:55 s 1 -128197.36 0 +294548.72 7740.0 C57
2021-11-29 07:23:55 S 11 27 56.078 +12 59 28.14 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)