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
2021-12-14 20:53:54 s 1 -175925.40 0 +112077.02 6470.0 C57
2021-12-14 21:03:54 S 12 08 03.226 +07 19 28.42 V C57
2021-12-14 21:03:54 s 1 -175840.35 9 +111245.57 9930.0 C57
2021-12-14 21:13:54 S 12 08 04.291 +07 19 16.68 V C57
2021-12-14 21:13:54 s 1 -175752.99 3 +110412.65 3370.0 C57
2021-12-14 21:23:54 S 12 08 05.230 +07 19 09.41 V C57
2021-12-14 21:23:54 s 1 -175663.28 5 +109578.26 6730.0 C57
2021-12-14 21:33:54 S 12 08 06.266 +07 19 02.24 V C57
2021-12-14 21:33:54 s 1 -175571.22 1 +108742.40 9960.0 C57
2021-12-14 21:43:54 S 12 08 07.066 +07 18 47.66 V C57
2021-12-14 21:43:54 s 1 -175476.78 7 +107905.07 2980.0 C57
2021-12-14 22:43:54 S 12 08 13.711 +07 17 49.85 V C57
2021-12-14 22:43:54 s 1 -174859.52 0 +102850.28 3370.0 C57
2021-12-14 22:53:54 S 12 08 14.597 +07 17 35.88 V C57
2021-12-14 22:53:54 s 1 -174748.05 2 +102002.69 3200.0 C57
2021-12-14 23:03:54 S 12 08 15.715 +07 17 28.79 V C57
2021-12-14 23:03:54 s 1 -174634.08 7 +101153.65 2310.0 C57
2021-12-14 23:13:54 S 12 08 16.682 +07 17 16.94 V C57
2021-12-14 23:13:54 s 1 -174517.60 8 +100303.15 630.0 C57
2021-12-14 23:23:54 S 12 08 17.626 +07 17 09.13 V C57
2021-12-14 23:23:54 s 1 -174398.59 9 +99451.193 8100.0 C57
2021-12-14 23:33:54 S 12 08 18.761 +07 16 58.58 V C57
2021-12-14 23:33:54 s 1 -174277.04 3 +98597.782 4650.0 C57
2021-12-14 23:43:54 S 12 08 19.723 +07 16 45.48 V C57
2021-12-14 23:43:54 s 1 -174152.92 4 +97742.920 200.0 C57
2021-12-14 23:53:54 S 12 08 20.750 +07 16 38.24 V C57
2021-12-14 23:53:54 s 1 -174026.22 4 +96886.608 4700.0 C57
2021-12-15 00:03:54 S 12 08 21.862 +07 16 26.69 V C57
2021-12-15 00:03:54 s 1 -173896.92 7 +96028.848 8060.0 C57
2021-12-15 00:13:54 S 12 08 22.699 +07 16 21.36 V C57
2021-12-15 00:13:54 s 1 -173765.01 4 +95169.643 220.0 C57
2021-12-15 01:03:54 S 12 08 27.962 +07 15 26.10 V C57
2021-12-15 01:03:54 s 1 -173065.61 0 +90852.018 430.0 C57
2021-12-15 01:23:54 S 12 08 30.245 +07 15 07.31 V C57
2021-12-15 01:23:54 s 1 -172766.92 0 +89114.936 5550.0 C57
2021-12-15 01:33:54 S 12 08 31.246 +07 14 59.57 V C57
2021-12-15 01:33:54 s 1 -172613.44 6 +88244.257 5450.0 C57
2021-12-15 01:43:54 S 12 08 32.374 +07 14 48.95 V C57
2021-12-15 01:43:54 s 1 -172457.19 4 +87372.157 3490.0 C57
2021-12-15 01:53:54 S 12 08 33.324 +07 14 38.11 V C57
2021-12-15 01:53:54 s 1 -172298.14 6 +86498.637 9570.0 C57
2021-12-15 02:03:54 S 12 08 34.291 +07 14 28.61 V C57
2021-12-15 02:03:54 s 1 -172136.28 2 +85623.703 3630.0 C57
2021-12-15 02:13:54 S 12 08 35.369 +07 14 20.26 V C57
2021-12-15 02:13:54 s 1 -171971.58 2 +84747.357 5590.0 C57
2021-12-15 02:33:54 S 12 08 37.699 +07 13 58.80 V C57
2021-12-15 02:33:54 s 1 -171633.60 1 +82990.443 2870.0 C57
2021-12-15 02:43:54 S 12 08 38.578 +07 13 50.74 V C57
2021-12-15 02:43:54 s 1 -171460.27 9 +82109.883 8040.0 C57
2021-12-15 02:53:54 S 12 08 39.842 +07 13 39.47 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)