IAA RAS IAA Minor Planet Database

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
2023-04-25 05:17:05 v 1 237.95175 +37.34916 – – 270
2023-04-25 05:29:36 V 12 43 28.84 +14 51 04.1 – V 270
2023-04-25 05:29:36 v 1 237.95175 +37.34916 – – 270
2023-04-25 05:42:06 V 12 43 28.16 +14 51 08.7 – V 270
2023-04-25 05:42:06 v 1 237.95175 +37.34916 – – 270
2023-04-25 05:54:49 V 12 43 27.48 +14 51 13.3 – V 270
2023-04-25 05:54:49 v 1 237.95175 +37.34916 – – 270
2023-04-25 09:26:08 V 12 43 17.06 +14 52 42.0 – V 270
2023-04-25 09:26:08 v 1 151.66014 -32.96841 – – 270
2023-04-25 10:03:51 V 12 43 15.02 +14 52 55.5 – V 270
2023-04-25 10:03:51 v 1 151.66014 -32.96841 – – 270
2023-04-25 10:50:32 V 12 43 12.49 +14 53 12.9 – V 270
2023-04-25 10:50:32 v 1 151.66014 -32.96841 – – 270
2023-04-25 11:29:22 V 12 43 10.43 +14 53 27.2 – V 270
2023-04-25 11:29:22 v 1 151.66014 -32.96841 – – 270
2023-04-26 01:52:01 V 12 42 26.94 +14 58 17.4 – V 270
2023-04-26 01:52:01 v 1 285.03176 +40.20064 – – 270
2023-04-26 02:17:13 V 12 42 25.61 +14 58 26.2 – V 270
2023-04-26 02:17:13 v 1 285.03176 +40.20064 – – 270
2023-04-26 02:50:48 V 12 42 24.01 +14 58 38.2 – V 270
2023-04-26 02:50:48 v 1 272.14686 +42.96081 – – 270
2023-04-26 02:56:46 V 12 42 23.51 +14 58 40.4 – V 270
2023-04-26 02:56:46 v 1 285.03176 +40.20064 – – 270
2023-04-26 03:22:10 V 12 42 22.16 +14 58 49.2 – V 270
2023-04-26 03:22:10 v 1 285.03176 +40.20064 – – 270
2023-04-26 03:31:51 V 12 42 21.85 +14 58 51.9 – V 270
2023-04-26 03:31:51 v 1 272.14686 +42.96081 – – 270
2023-04-26 04:12:53 V 12 42 19.61 +14 59 06.3 – V 270
2023-04-26 04:12:53 v 1 272.14686 +42.96081 – – 270
2023-04-26 05:12:52 V 12 42 16.84 +14 59 27.8 – V 270
2023-04-26 05:12:52 v 1 237.95187 +37.34914 – – 270
2023-04-26 05:21:39 V 12 42 16.02 +14 59 29.6 – V 270
2023-04-26 05:21:39 v 1 272.14686 +42.96081 – – 270
2023-04-26 05:25:22 V 12 42 16.12 +14 59 32.5 – V 270
2023-04-26 05:25:22 v 1 237.95187 +37.34914 – – 270
2023-04-26 05:37:53 V 12 42 15.45 +14 59 36.7 – V 270
2023-04-26 05:37:53 v 1 237.95187 +37.34914 – – 270
2023-04-26 05:50:35 V 12 42 14.80 +14 59 41.3 – V 270
2023-04-26 05:50:35 v 1 237.95187 +37.34914 – – 270
2023-04-26 06:12:16 V 12 42 13.66 +14 59 47.1 – V 270
2023-04-26 06:12:16 v 1 237.34911 +47.62044 – – 270
2023-04-26 06:47:25 V 12 42 11.88 +14 59 58.6 – V 270
2023-04-26 06:47:25 v 1 237.34911 +47.62044 – – 270
2023-04-26 06:57:06 V 12 42 11.32 +15 00 03.8 – V 270
2023-04-26 06:57:06 v 1 239.29155 +39.27617 – – 270
2023-04-26 07:32:34 V 12 42 09.52 +15 00 14.2 – V 270
2023-04-26 07:32:34 v 1 237.34911 +47.62044 – – 270
2023-04-26 07:48:33 V 12 42 07.95 +15 00 25.3 – V 270
2023-04-26 07:48:33 v 1 239.29155 +39.27617 – – 270
2023-04-26 08:21:09 V 12 42 06.95 +15 00 30.7 – V 270
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)