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
2023-04-26 08:21:09 v 1 237.34911 +47.62044 – – 270
2023-04-26 08:48:37 V 12 42 05.71 +15 00 39.5 – V 270
2023-04-26 08:48:37 v 1 239.29155 +39.27617 – – 270
2023-04-26 09:30:53 V 12 42 04.22 +15 01 09.4 – V 270
2023-04-26 09:30:53 v 1 151.66015 -32.96836 – – 270
2023-04-26 09:35:57 V 12 42 03.03 +15 00 56.8 – V 270
2023-04-26 09:35:57 v 1 239.29155 +39.27617 – – 270
2023-04-26 10:06:25 V 12 42 02.35 +15 01 21.5 – V 270
2023-04-26 10:06:25 v 1 151.66015 -32.96836 – – 270
2023-04-26 10:58:11 V 12 41 59.61 +15 01 39.1 – V 270
2023-04-26 10:58:11 v 1 151.66015 -32.96836 – – 270
2023-04-26 11:06:30 V 12 41 59.27 +15 01 29.4 – V 270
2023-04-26 11:06:30 v 1 134.17900 +34.51201 – – 270
2023-04-26 11:33:31 V 12 41 57.74 +15 01 51.4 – V 270
2023-04-26 11:33:31 v 1 151.66015 -32.96836 – – 270
2023-04-26 11:46:21 V 12 41 57.19 +15 01 42.9 – V 270
2023-04-26 11:46:21 v 1 134.17900 +34.51201 – – 270
2023-04-26 12:26:58 V 12 41 55.12 +15 01 56.7 – V 270
2023-04-26 12:26:58 v 1 134.17900 +34.51201 – – 270
2023-04-26 12:30:05 V 12 41 54.94 +15 01 58.0 – V 270
2023-04-26 12:30:05 v 1 134.35900 +35.08986 – – 270
2023-04-26 12:35:15 V 12 41 54.65 +15 01 59.8 – V 270
2023-04-26 12:35:15 v 1 134.35900 +35.08986 – – 270
2023-04-26 12:49:50 V 12 41 53.85 +15 02 05.1 – V 270
2023-04-26 12:49:50 v 1 134.35900 +35.08986 – – 270
2023-04-26 13:03:10 V 12 41 53.20 +15 02 08.4 – V 270
2023-04-26 13:03:10 v 1 134.35900 +35.08986 – – 270
2023-04-26 13:06:55 V 12 41 53.03 +15 02 10.0 – V 270
2023-04-26 13:06:55 v 1 134.17900 +34.51201 – – 270
2023-04-26 20:02:16 V 12 41 32.46 +15 04 25.4 – V 270
2023-04-26 20:02:16 v 1 012.47541 +55.77222 – – 270
2023-04-26 20:07:38 V 12 41 32.21 +15 04 27.1 – V 270
2023-04-26 20:07:38 v 1 012.47541 +55.77222 – – 270
2023-04-26 20:14:11 V 12 41 31.90 +15 04 29.1 – V 270
2023-04-26 20:14:11 v 1 012.47541 +55.77222 – – 270
2023-04-26 20:38:48 V 12 41 30.55 +15 04 37.3 – V 270
2023-04-26 20:38:48 v 1 012.47541 +55.77222 – – 270
2023-04-26 21:31:08 V 12 41 28.02 +15 04 54.8 – V 270
2023-04-26 21:31:08 v 1 006.40755 +52.19009 – – 270
2023-04-26 22:11:00 V 12 41 25.99 +15 05 08.1 – V 270
2023-04-26 22:11:00 v 1 006.40755 +52.19009 – – 270
2023-04-26 22:50:52 V 12 41 23.92 +15 05 22.6 – V 270
2023-04-26 22:50:52 v 1 006.40755 +52.19009 – – 270
2023-04-26 23:33:58 V 12 41 21.67 +15 05 36.0 – V 270
2023-04-26 23:33:58 v 1 006.40755 +52.19009 – – 270
2023-04-27 05:11:41 V 12 41 05.47 +15 07 28.4 – V 270
2023-04-27 05:11:41 v 1 237.95187 +37.34914 – – 270
2023-04-27 05:24:11 V 12 41 04.79 +15 07 33.2 – V 270
2023-04-27 05:24:11 v 1 237.95187 +37.34914 – – 270
2023-04-27 05:36:42 V 12 41 04.14 +15 07 37.2 – 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)