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
2021-12-13 04:43:54 s 1 -151604.45 1 +271163.49 1040.0 C57
2021-12-13 05:03:54 S 12 03 49.798 +07 59 09.13 V C57
2021-12-13 05:03:54 s 1 -152050.23 7 +270157.21 7120.0 C57
2021-12-13 05:13:54 S 12 03 51.038 +07 59 00.13 V C57
2021-12-13 05:13:54 s 1 -152272.11 4 +269652.26 5500.0 C57
2021-12-13 05:23:54 S 12 03 51.972 +07 58 50.05 V C57
2021-12-13 05:23:54 s 1 -152493.31 0 +269146.11 750.0 C57
2021-12-13 05:33:54 S 12 03 53.261 +07 58 39.83 V C57
2021-12-13 05:33:54 s 1 -152713.82 2 +268638.74 2870.0 C57
2021-12-13 05:43:54 S 12 03 54.139 +07 58 32.92 V C57
2021-12-13 05:43:54 s 1 -152933.64 7 +268130.17 1840.0 C57
2021-12-13 05:53:54 S 12 03 55.010 +07 58 23.05 V C57
2021-12-13 05:53:54 s 1 -153152.78 2 +267620.39 7650.0 C57
2021-12-13 06:03:54 S 12 03 56.230 +07 58 13.48 V C57
2021-12-13 06:03:54 s 1 -153371.22 3 +267109.39 280.0 C57
2021-12-13 06:13:54 S 12 03 57.382 +07 57 57.53 V C57
2021-12-13 06:13:54 s 1 -153588.96 9 +266597.18 9720.0 C57
2021-12-13 06:23:54 S 12 03 58.238 +07 57 51.98 V C57
2021-12-13 06:23:54 s 1 -153806.01 5 +266083.76 5970.0 C57
2021-12-13 07:13:54 S 12 04 04.073 +07 57 05.87 V C57
2021-12-13 07:13:54 s 1 -154880.64 7 +263498.37 8700.0 C57
2021-12-13 07:33:54 S 12 04 05.875 +07 56 45.92 V C57
2021-12-13 07:33:54 s 1 -155305.49 6 +262455.67 8920.0 C57
2021-12-13 07:43:54 S 12 04 06.768 +07 56 29.18 V C57
2021-12-13 07:43:54 s 1 -155516.83 6 +261932.48 9070.0 C57
2021-12-13 07:53:54 S 12 04 08.002 +07 56 20.33 V C57
2021-12-13 07:53:54 s 1 -155727.44 8 +261408.07 5900.0 C57
2021-12-13 08:03:54 S 12 04 08.986 +07 56 11.87 V C57
2021-12-13 08:03:54 s 1 -155937.32 9 +260882.43 9400.0 C57
2021-12-13 08:13:54 S 12 04 10.085 +07 56 03.26 V C57
2021-12-13 08:13:54 s 1 -156146.47 6 +260355.55 9540.0 C57
2021-12-13 08:23:54 S 12 04 11.287 +07 55 52.36 V C57
2021-12-13 08:23:54 s 1 -156354.88 6 +259827.45 6330.0 C57
2021-12-13 08:33:54 S 12 04 12.209 +07 55 41.12 V C57
2021-12-13 08:33:54 s 1 -156562.55 6 +259298.12 9730.0 C57
2021-12-13 08:43:54 S 12 04 13.426 +07 55 33.17 V C57
2021-12-13 08:43:54 s 1 -156769.48 1 +258767.56 9740.0 C57
2021-12-13 08:53:54 S 12 04 14.302 +07 55 24.13 V C57
2021-12-13 08:53:54 s 1 -156975.65 9 +258235.76 6350.0 C57
2021-12-13 09:03:54 S 12 04 15.278 +07 55 09.23 V C57
2021-12-13 09:03:54 s 1 -157181.08 7 +257702.72 9540.0 C57
2021-12-13 10:13:54 S 12 04 22.877 +07 54 05.47 V C57
2021-12-13 10:13:54 s 1 -158597.78 5 +253936.78 4900.0 C57
2021-12-13 10:23:54 S 12 04 23.959 +07 53 54.82 V C57
2021-12-13 10:23:54 s 1 -158797.08 7 +253393.82 210.0 C57
2021-12-13 10:33:54 S 12 04 25.147 +07 53 46.43 V C57
2021-12-13 10:33:54 s 1 -158995.60 7 +252849.61 1960.0 C57
2021-12-13 10:39:15 C 12 04 03.36 +07 54 42.7 V 703
2021-12-13 10:43:54 S 12 04 25.982 +07 53 34.19 V C57
2021-12-13 10:43:54 s 1 -159193.34 3 +252304.15 160.0 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)