1627 Ivar (1929 SH)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3973228500 ± 3.37e-09
Semi-major axis (a)1.8630580824 AU ± 4.99e-10
Inclination (i)8.45629236° ± 2.99e-07
Long. of Asc. Node (Ω)133.07459963° ± 2.39e-06
Arg. of Perihelion (ω)167.83961943° ± 2.63e-06
Mean Anomaly (M)311.46100560° ± 6.93e-07
Mean Motion (n)0.3875901077°/day ± 1.56e-10
Perihelion dist (q)1.12282254 AU ± 6.29e-09
Aphelion dist (Q)2.60329363 AU ± 6.32e-09
Orbital Period2.54296037 yr ± 1.02e-09
NGA Modelr2
A2-5.33141704e-16 ± 5.07e-16 AU/d²
Physical Parameters
H (abs. magnitude)12.79
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.120″
Uncertainty0
Orbit TypeAmor
MOID0.108765 AU
Observations Used13532
Radar Obs Used4
Gaia Obs Used222
Oppositions53
Arc Total1929-2025
First Observation Used1929-09-25
Last Observation Used2025-06-15
Observations (18178)
Date Type RA Dec Mag Band Observatory
2021-10-03 07:03:58 s 1 +124526.47 7 +305365.24 5800.0 C57
2021-10-03 08:23:58 S 06 37 10.118 +14 30 23.36 V C57
2021-10-03 08:23:58 s 1 +122091.18 5 +308424.16 8350.0 C57
2021-10-03 08:33:58 S 06 37 10.442 +14 30 22.39 V C57
2021-10-03 08:33:58 s 1 +121784.67 4 +308801.11 7000.0 C57
2021-10-03 08:43:58 S 06 37 10.819 +14 30 19.55 V C57
2021-10-03 08:43:58 s 1 +121477.70 4 +309176.87 4190.0 C57
2021-10-03 08:47:12 S 06 37 02.01 +14 28 58.4 L C51
2021-10-03 08:53:58 S 06 37 11.174 +14 30 19.91 V C57
2021-10-03 08:53:58 s 1 +121170.27 6 +309551.43 9920.0 C57
2021-10-03 09:03:58 S 06 37 11.482 +14 30 18.14 V C57
2021-10-03 09:03:58 s 1 +120862.39 4 +309924.80 4210.0 C57
2021-10-03 09:13:58 S 06 37 11.753 +14 30 16.42 V C57
2021-10-03 09:13:58 s 1 +120554.05 8 +310296.96 7070.0 C57
2021-10-03 09:23:58 S 06 37 12.204 +14 30 14.40 V C57
2021-10-03 09:23:58 s 1 +120245.27 1 +310667.94 8490.0 C57
2021-10-03 09:33:58 S 06 37 12.559 +14 30 13.75 V C57
2021-10-03 09:33:58 s 1 +119936.03 6 +311037.72 8490.0 C57
2021-10-03 09:43:58 S 06 37 12.900 +14 30 10.66 V C57
2021-10-03 09:43:58 s 1 +119626.35 4 +311406.30 7070.0 C57
2021-10-03 10:43:58 S 06 37 14.894 +14 30 09.04 V C57
2021-10-03 10:43:58 s 1 +117758.99 7 +313592.82 9150.0 C57
2021-10-03 10:53:58 S 06 37 15.122 +14 30 05.18 V C57
2021-10-03 10:53:58 s 1 +117446.24 6 +313953.08 8000.0 C57
2021-10-03 11:03:58 S 06 37 15.557 +14 30 04.61 V C57
2021-10-03 11:03:58 s 1 +117133.06 5 +314312.16 5480.0 C57
2021-10-03 11:13:58 S 06 37 15.694 +14 30 02.16 V C57
2021-10-03 11:13:58 s 1 +116819.45 5 +314670.05 1600.0 C57
2021-10-03 11:23:58 S 06 37 16.022 +14 30 00.11 V C57
2021-10-03 11:23:58 s 1 +116505.41 9 +315026.76 6380.0 C57
2021-10-03 11:33:58 S 06 37 16.452 +14 29 59.86 V C57
2021-10-03 11:33:58 s 1 +116190.95 9 +315382.28 9810.0 C57
2021-10-03 11:43:58 S 06 37 16.810 +14 29 59.14 V C57
2021-10-03 11:43:58 s 1 +115876.07 7 +315736.62 1900.0 C57
2021-10-03 11:53:58 S 06 37 17.078 +14 29 57.62 V C57
2021-10-03 11:53:58 s 1 +115560.77 5 +316089.78 2660.0 C57
2021-10-03 11:55:32 S 06 37 08.35 +14 28 35.1 L C51
2021-10-03 12:03:58 S 06 37 17.378 +14 29 55.07 V C57
2021-10-03 12:03:58 s 1 +115245.05 4 +316441.76 2090.0 C57
2021-10-03 12:53:58 S 06 37 19.037 +14 29 50.71 V C57
2021-10-03 12:53:58 s 1 +113660.24 5 +318183.98 9620.0 C57
2021-10-03 13:03:58 S 06 37 19.315 +14 29 47.04 V C57
2021-10-03 13:03:58 s 1 +113342.05 6 +318528.90 1240.0 C57
2021-10-03 13:13:58 S 06 37 19.572 +14 29 44.20 V C57
2021-10-03 13:13:58 s 1 +113023.46 3 +318872.64 1580.0 C57
2021-10-03 13:23:58 S 06 37 20.038 +14 29 47.62 V C57
2021-10-03 13:23:58 s 1 +112704.46 6 +319215.21 640.0 C57
2021-10-03 13:29:35 S 06 37 11.53 +14 28 24.2 L C51
2021-10-03 13:33:58 S 06 37 20.376 +14 29 45.31 V C57
2021-10-03 13:33:58 s 1 +112385.06 9 +319556.60 8440.0 C57
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-07-08 08:00:00 20560 6 Hz 2380 -1 -1
1985-07-08.333333 2056000 600 Hz 2380 251 251
1985-07-09 08:09:00 202574571 16 us 2380 -1 -1
1985-07-09.339583 20257457100 16000 us 2380 251 251
2013-06-27 09:40:00 323904701.64 5 us 2380 -1 -1
2013-07-04 09:14:00 321083718.18 5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)