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
2021-11-30 17:23:55 s 1 -166630.60 8 +176925.96 6900.0 C57
2021-11-30 17:33:55 S 11 31 22.217 +12 30 55.91 V C57
2021-11-30 17:33:55 s 1 -166707.72 4 +176203.24 6800.0 C57
2021-11-30 19:33:55 S 11 31 34.138 +12 29 16.62 V C57
2021-11-30 19:33:55 s 1 -167513.65 0 +167406.93 370.0 C57
2021-11-30 19:43:55 S 11 31 35.568 +12 29 01.46 V C57
2021-11-30 19:43:55 s 1 -167570.58 0 +166663.53 6620.0 C57
2021-11-30 19:53:55 S 11 31 36.430 +12 28 56.42 V C57
2021-11-30 19:53:55 s 1 -167625.89 2 +165918.52 6170.0 C57
2021-11-30 20:03:55 S 11 31 37.394 +12 28 43.90 V C57
2021-11-30 20:03:55 s 1 -167679.57 6 +165171.91 8990.0 C57
2021-11-30 20:13:55 S 11 31 38.498 +12 28 39.36 V C57
2021-11-30 20:13:55 s 1 -167731.62 4 +164423.69 5040.0 C57
2021-11-30 20:23:55 S 11 31 39.473 +12 28 29.64 V C57
2021-11-30 20:23:55 s 1 -167782.02 5 +163673.86 4280.0 C57
2021-11-30 20:33:55 S 11 31 40.466 +12 28 24.02 V C57
2021-11-30 20:33:55 s 1 -167830.77 0 +162922.41 6660.0 C57
2021-11-30 20:53:55 S 11 31 42.130 +12 28 00.55 V C57
2021-11-30 20:53:55 s 1 -167923.24 9 +161414.68 720.0 C57
2021-11-30 22:33:55 S 11 31 52.495 +12 26 40.78 V C57
2021-11-30 22:33:55 s 1 -168282.77 7 +153778.65 6020.0 C57
2021-11-30 22:43:55 S 11 31 53.270 +12 26 36.02 V C57
2021-11-30 22:43:55 s 1 -168309.04 8 +153006.08 5590.0 C57
2021-11-30 22:53:55 S 11 31 53.942 +12 26 26.41 V C57
2021-11-30 22:53:55 s 1 -168333.51 6 +152231.87 7710.0 C57
2021-11-30 23:03:55 S 11 31 55.363 +12 26 13.63 V C57
2021-11-30 23:03:55 s 1 -168356.16 8 +151456.02 2350.0 C57
2021-12-01 00:43:55 S 11 32 05.378 +12 24 51.48 V C57
2021-12-01 00:43:55 s 1 -168480.33 0 +143607.06 6930.0 C57
2021-12-01 00:53:55 S 11 32 06.334 +12 24 43.06 V C57
2021-12-01 00:53:55 s 1 -168482.24 9 +142813.09 6170.0 C57
2021-12-01 01:03:55 S 11 32 07.056 +12 24 31.79 V C57
2021-12-01 01:03:55 s 1 -168482.21 2 +142017.45 7360.0 C57
2021-12-01 01:13:55 S 11 32 08.189 +12 24 24.08 V C57
2021-12-01 01:13:55 s 1 -168480.20 4 +141220.15 440.0 C57
2021-12-01 01:33:55 S 11 32 10.092 +12 24 09.04 V C57
2021-12-01 01:33:55 s 1 -168470.23 0 +139620.58 2090.0 C57
2021-12-01 01:43:55 S 11 32 11.285 +12 24 01.37 V C57
2021-12-01 01:43:55 s 1 -168462.23 7 +138818.30 560.0 C57
2021-12-01 03:13:55 S 11 32 20.112 +12 22 44.15 V C57
2021-12-01 03:13:55 s 1 -168297.76 1 +131522.76 6590.0 C57
2021-12-01 03:33:55 S 11 32 22.174 +12 22 28.34 V C57
2021-12-01 03:33:55 s 1 -168237.99 2 +129883.14 3730.0 C57
2021-12-01 03:43:55 S 11 32 23.148 +12 22 19.92 V C57
2021-12-01 03:43:55 s 1 -168204.85 6 +129060.81 8970.0 C57
2021-12-01 03:53:55 S 11 32 23.993 +12 22 12.11 V C57
2021-12-01 03:53:55 s 1 -168169.53 5 +128236.81 5240.0 C57
2021-12-01 04:03:55 S 11 32 25.015 +12 22 02.32 V C57
2021-12-01 04:03:55 s 1 -168132.01 3 +127411.13 2490.0 C57
2021-12-01 04:13:55 S 11 32 26.174 +12 21 55.48 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)