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
2021-12-06 06:23:55 s 1 +156504.09 3 +264006.31 6100.0 C57
2021-12-06 06:33:55 S 11 45 41.035 +10 36 45.11 V C57
2021-12-06 06:33:55 s 1 +156301.12 5 +264525.65 7170.0 C57
2021-12-06 06:53:55 S 11 45 43.313 +10 36 24.44 V C57
2021-12-06 06:53:55 s 1 +155892.97 2 +265560.63 1180.0 C57
2021-12-06 07:03:55 S 11 45 44.232 +10 36 20.92 V C57
2021-12-06 07:03:55 s 1 +155687.79 4 +266076.27 4140.0 C57
2021-12-06 07:13:55 S 11 45 45.638 +10 36 05.54 V C57
2021-12-06 07:13:55 s 1 +155481.88 6 +266590.68 4430.0 C57
2021-12-06 08:43:55 S 11 45 55.663 +10 34 47.46 V C57
2021-12-06 08:43:55 s 1 +153596.37 7 +271165.26 8480.0 C57
2021-12-06 08:53:55 S 11 45 56.285 +10 34 36.84 V C57
2021-12-06 08:53:55 s 1 +153383.33 9 +271667.45 2650.0 C57
2021-12-06 09:03:55 S 11 45 57.605 +10 34 28.13 V C57
2021-12-06 09:03:55 s 1 +153169.60 5 +272168.42 4270.0 C57
2021-12-06 09:13:55 S 11 45 58.829 +10 34 22.66 V C57
2021-12-06 09:13:55 s 1 +152955.17 8 +272668.18 3360.0 C57
2021-12-06 09:23:55 S 11 45 59.930 +10 34 09.59 V C57
2021-12-06 09:23:55 s 1 +152740.06 1 +273166.73 9920.0 C57
2021-12-06 09:33:55 S 11 46 01.046 +10 33 58.90 V C57
2021-12-06 09:33:55 s 1 +152524.25 7 +273664.06 3970.0 C57
2021-12-06 11:13:55 S 11 46 12.422 +10 32 28.14 V C57
2021-12-06 11:13:55 s 1 +150329.05 3 +278571.11 8740.0 C57
2021-12-06 11:23:55 S 11 46 13.399 +10 32 22.74 V C57
2021-12-06 11:23:55 s 1 +150105.87 9 +279055.22 5880.0 C57
2021-12-06 11:33:55 S 11 46 14.426 +10 32 15.40 V C57
2021-12-06 11:33:55 s 1 +149882.05 3 +279538.12 650.0 C57
2021-12-06 11:43:55 S 11 46 15.290 +10 32 05.17 V C57
2021-12-06 11:43:55 s 1 +149657.57 6 +280019.84 3050.0 C57
2021-12-06 11:53:55 S 11 46 16.716 +10 31 53.54 V C57
2021-12-06 11:53:55 s 1 +149432.45 2 +280500.36 3090.0 C57
2021-12-06 12:03:55 S 11 46 17.755 +10 31 44.90 V C57
2021-12-06 12:03:55 s 1 +149206.68 3 +280979.69 780.0 C57
2021-12-06 12:13:55 S 11 46 18.809 +10 31 35.72 V C57
2021-12-06 12:13:55 s 1 +148980.27 3 +281457.83 6130.0 C57
2021-12-06 12:23:55 S 11 46 20.186 +10 31 28.34 V C57
2021-12-06 12:23:55 s 1 +148753.22 3 +281934.78 9160.0 C57
2021-12-06 13:43:55 S 11 46 28.682 +10 30 17.42 V C57
2021-12-06 13:43:55 s 1 +146907.75 1 +285707.65 860.0 C57
2021-12-06 13:53:55 S 11 46 30.233 +10 30 06.19 V C57
2021-12-06 13:53:55 s 1 +146675.05 3 +286173.94 3350.0 C57
2021-12-06 14:03:55 S 11 46 31.111 +10 29 56.22 V C57
2021-12-06 14:03:55 s 1 +146441.74 2 +286639.06 3620.0 C57
2021-12-06 14:13:55 S 11 46 32.066 +10 29 46.25 V C57
2021-12-06 14:13:55 s 1 +146207.82 0 +287103.01 1660.0 C57
2021-12-06 14:23:55 S 11 46 33.204 +10 29 38.76 V C57
2021-12-06 14:23:55 s 1 +145973.29 1 +287565.78 7510.0 C57
2021-12-06 14:33:55 S 11 46 34.548 +10 29 31.56 V C57
2021-12-06 14:33:55 s 1 +145738.15 7 +288027.38 1150.0 C57
2021-12-06 14:43:55 S 11 46 35.244 +10 29 21.66 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)