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
2023-04-30 03:19:02 v 1 262.17106 +30.43763 270
2023-04-30 07:11:40 V 12 37 35.39 +15 29 00.8 V 270
2023-04-30 07:11:40 v 1 237.34934 +47.62010 270
2023-04-30 07:22:59 V 12 37 34.83 +15 29 04.4 V 270
2023-04-30 07:22:59 v 1 237.34934 +47.62010 270
2023-04-30 07:36:33 V 12 37 34.20 +15 29 07.2 V 270
2023-04-30 07:36:33 v 1 237.34934 +47.62010 270
2023-04-30 07:48:04 V 12 37 33.65 +15 29 10.2 V 270
2023-04-30 07:48:04 v 1 237.34934 +47.62010 270
2023-04-30 19:45:39 C 12 37 01.76 +15 32 11.3 X G02
2023-04-30 19:49:58 C 12 37 01.56 +15 32 12.4 X G02
2023-04-30 19:54:02 C 12 37 01.37 +15 32 13.4 X G02
2023-04-30 19:59:24 C 12 37 01.130 +15 32 29.87 V M22
2023-04-30 20:02:43 C 12 37 00.972 +15 32 30.77 V M22
2023-04-30 20:06:45 C 12 37 00.778 +15 32 31.67 V M22
2023-04-30 20:31:08 V 12 36 59.60 +15 32 22.6 V 270
2023-04-30 20:31:08 v 1 016.33822 +48.21618 270
2023-04-30 20:32:50 C 12 36 59.539 +15 32 38.22 V M22
2023-04-30 20:38:37 B 12 36 59.37 +15 32 23.6 V L65
2023-04-30 20:43:39 V 12 36 59.03 +15 32 26.0 V 270
2023-04-30 20:43:39 v 1 016.33822 +48.21618 270
2023-04-30 20:46:55 B 12 36 58.96 +15 32 25.6 V L65
2023-04-30 20:56:09 V 12 36 58.43 +15 32 29.4 V 270
2023-04-30 20:56:09 v 1 016.33822 +48.21618 270
2023-04-30 20:59:20 B 12 36 58.38 +15 32 28.7 V L65
2023-04-30 21:08:52 V 12 36 57.85 +15 32 31.6 V 270
2023-04-30 21:08:52 v 1 016.33822 +48.21618 270
2023-05-01 12:12:51 V 12 36 18.18 +15 36 11.1 V 270
2023-05-01 12:12:51 v 1 134.35900 +35.08986 270
2023-05-01 12:23:23 V 12 36 17.69 +15 36 14.3 V 270
2023-05-01 12:23:23 v 1 134.35900 +35.08986 270
2023-05-01 12:26:21 V 12 36 17.50 +15 36 14.5 V 270
2023-05-01 12:26:21 v 1 134.35900 +35.08986 270
2023-05-01 12:29:44 V 12 36 17.35 +15 36 15.4 V 270
2023-05-01 12:29:44 v 1 134.35900 +35.08986 270
2023-05-01 20:36:46 B 12 35 56.11 +15 38 04.4 Z M45
2023-05-01 20:39:32 B 12 35 55.99 +15 38 05.1 Z M45
2023-05-01 20:42:06 B 12 35 55.87 +15 38 05.6 Z M45
2023-05-02 20:38:09 B 12 34 55.058 +15 43 12.40 V L65
2023-05-02 20:42:18 B 12 34 54.857 +15 43 13.30 V L65
2023-05-02 20:46:26 B 12 34 54.689 +15 43 14.05 V L65
2023-05-02 20:59:35 V 12 34 54.24 +15 43 18.9 V 270
2023-05-02 20:59:35 v 1 002.83920 +44.07176 270
2023-05-02 21:03:40 V 12 34 54.03 +15 43 17.9 V 270
2023-05-02 21:03:40 v 1 358.57268 +43.46766 270
2023-05-02 21:08:31 V 12 34 53.84 +15 43 20.5 V 270
2023-05-02 21:08:31 v 1 002.83920 +44.07176 270
2023-05-02 21:16:28 V 12 34 53.54 +15 43 25.1 V 270
2023-05-02 21:16:28 v 1 002.83920 +44.07176 270
2023-05-02 21:24:16 V 12 34 53.16 +15 43 26.7 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)