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 06:53:55 s 1 -159085.89 8 +219360.23 5300.0 C57
2021-11-30 07:03:55 S 11 30 19.267 +12 39 46.51 V C57
2021-11-30 07:03:55 s 1 -159242.51 1 +218732.97 6870.0 C57
2021-11-30 07:13:55 S 11 30 20.230 +12 39 32.87 V C57
2021-11-30 07:13:55 s 1 -159398.05 9 +218104.26 3960.0 C57
2021-11-30 09:03:55 S 11 30 31.202 +12 38 01.82 V C57
2021-11-30 09:03:55 s 1 -161037.23 3 +211091.97 660.0 C57
2021-11-30 09:13:55 S 11 30 32.218 +12 37 52.82 V C57
2021-11-30 09:13:55 s 1 -161179.56 7 +210445.67 2360.0 C57
2021-11-30 09:23:55 S 11 30 33.408 +12 37 46.27 V C57
2021-11-30 09:23:55 s 1 -161320.76 2 +209797.89 9290.0 C57
2021-11-30 09:33:55 S 11 30 34.169 +12 37 38.78 V C57
2021-11-30 09:33:55 s 1 -161460.81 3 +209148.63 1430.0 C57
2021-11-30 09:43:55 S 11 30 35.446 +12 37 29.93 V C57
2021-11-30 09:43:55 s 1 -161599.71 2 +208497.89 8750.0 C57
2021-11-30 09:53:55 S 11 30 36.406 +12 37 21.40 V C57
2021-11-30 09:53:55 s 1 -161737.45 5 +207845.66 1230.0 C57
2021-11-30 10:03:55 S 11 30 37.457 +12 37 09.08 V C57
2021-11-30 10:03:55 s 1 -161874.03 4 +207191.94 8840.0 C57
2021-11-30 10:13:55 S 11 30 38.179 +12 37 06.06 V C57
2021-11-30 10:13:55 s 1 -162009.44 4 +206536.74 1570.0 C57
2021-11-30 11:33:55 S 11 30 46.505 +12 35 57.66 V C57
2021-11-30 11:33:55 s 1 -163049.87 1 +201241.28 4190.0 C57
2021-11-30 11:53:55 S 11 30 48.274 +12 35 39.73 V C57
2021-11-30 11:53:55 s 1 -163297.83 9 +199902.39 4130.0 C57
2021-11-30 12:03:55 S 11 30 49.387 +12 35 30.70 V C57
2021-11-30 12:03:55 s 1 -163419.96 6 +199230.67 1350.0 C57
2021-11-30 12:13:55 S 11 30 50.342 +12 35 19.32 V C57
2021-11-30 12:13:55 s 1 -163540.84 6 +198557.45 3360.0 C57
2021-11-30 12:33:55 S 11 30 52.476 +12 35 09.60 V C57
2021-11-30 12:33:55 s 1 -163778.83 8 +197206.45 1660.0 C57
2021-11-30 12:43:55 S 11 30 53.328 +12 34 58.80 V C57
2021-11-30 12:43:55 s 1 -163895.93 7 +196528.67 7900.0 C57
2021-11-30 14:13:55 S 11 31 02.266 +12 33 44.21 V C57
2021-11-30 14:13:55 s 1 -164891.63 6 +190360.00 1420.0 C57
2021-11-30 14:23:55 S 11 31 03.439 +12 33 31.97 V C57
2021-11-30 14:23:55 s 1 -164995.67 2 +189666.92 3220.0 C57
2021-11-30 14:33:55 S 11 31 04.423 +12 33 25.31 V C57
2021-11-30 14:33:55 s 1 -165098.36 2 +188972.30 9410.0 C57
2021-11-30 14:43:55 S 11 31 05.278 +12 33 14.83 V C57
2021-11-30 14:43:55 s 1 -165199.69 8 +188276.13 9960.0 C57
2021-11-30 14:53:55 S 11 31 06.096 +12 33 05.69 V C57
2021-11-30 14:53:55 s 1 -165299.67 3 +187578.43 4850.0 C57
2021-11-30 15:23:55 S 11 31 09.305 +12 32 45.17 V C57
2021-11-30 15:23:55 s 1 -165591.35 2 +185476.01 5220.0 C57
2021-11-30 17:03:55 S 11 31 19.531 +12 31 20.46 V C57
2021-11-30 17:03:55 s 1 -166471.91 3 +178366.65 8570.0 C57
2021-11-30 17:13:55 S 11 31 20.558 +12 31 12.36 V C57
2021-11-30 17:13:55 s 1 -166552.00 1 +177647.09 810.0 C57
2021-11-30 17:23:55 S 11 31 21.322 +12 30 59.83 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)