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
2025-01-05 10:22:52 C 09 10 23.726 +14 17 28.68 V T05
2025-01-05 10:25:29 C 09 10 23.626 +14 17 29.36 V T05
2025-01-05 10:29:26 C 09 10 23.479 +14 17 30.34 V T05
2025-01-05 10:59:46 C 09 10 22.327 +14 17 38.11 V T08
2025-01-05 11:04:33 C 09 10 22.150 +14 17 39.34 V T08
2025-01-05 11:08:32 C 09 10 21.996 +14 17 40.27 V T08
2025-01-05 11:16:08 C 09 10 21.706 +14 17 42.07 V T05
2025-01-05 11:59:21 C 09 10 20.054 +14 17 52.87 V T08
2025-01-05 17:07:42 C 09 10 08.779 +14 19 13.01 V P07
2025-01-05 17:07:49 C 09 10 08.755 +14 19 13.01 V P07
2025-01-05 17:54:12 C 09 10 06.994 +14 19 24.74 V P07
2025-01-05 18:27:39 C 09 10 05.746 +14 19 33.49 V P07
2025-01-05 19:10:40 C 09 10 04.066 +14 19 44.33 V P07
2025-01-05 19:59:58 C 09 10 02.150 +14 19 55.74 V P07
2025-01-05 20:00:55 C 09 10 02.124 +14 19 56.64 V P07
2025-01-05 20:49:56 C 09 10 00.271 +14 20 08.52 V P07
2025-01-06 00:52:32 C 09 09 51.377 +14 21 10.12 V M22
2025-01-06 00:58:24 C 09 09 51.139 +14 21 11.70 V M22
2025-01-06 01:06:14 C 09 09 50.849 +14 21 13.64 V M22
2025-01-06 01:24:34 C 09 09 50.138 +14 21 18.29 V M22
2025-01-06 10:21:23 C 09 09 30.203 +14 23 29.32 X F51
2025-01-06 10:37:10 C 09 09 29.602 +14 23 33.94 X F51
2025-01-06 10:52:55 C 09 09 28.996 +14 23 36.76 X F51
2025-01-06 11:08:38 C 09 09 28.357 +14 23 41.37 X F51
2025-01-06 16:34:21 C 09 09 16.058 +14 25 07.97 V P07
2025-01-06 16:41:41 C 09 09 15.71 +14 25 05.1 V D29
2025-01-06 17:10:58 C 09 09 14.56 +14 25 12.6 V D29
2025-01-06 17:40:14 C 09 09 13.41 +14 25 20.1 V D29
2025-01-06 18:40:28 C 09 09 11.052 +14 25 40.37 V P07
2025-01-06 19:29:47 C 09 09 09.122 +14 25 52.93 V P07
2025-01-06 20:15:08 C 09 09 07.282 +14 26 04.42 V P07
2025-01-06 20:17:14 C 09 09 07.229 +14 26 04.88 V P07
2025-01-07 11:23:03 C 09 08 32.513 +14 29 54.85 V T05
2025-01-07 11:26:58 C 09 08 32.350 +14 29 55.79 V T05
2025-01-07 11:31:18 C 09 08 32.177 +14 29 57.05 V T05
2025-01-07 11:39:07 C 09 08 31.862 +14 29 59.10 V T05
2025-01-07 16:43:03 C 09 08 20.059 +14 31 21.90 V P07
2025-01-07 17:53:01 C 09 08 17.225 +14 31 40.44 V P07
2025-01-07 18:37:33 C 09 08 15.422 +14 31 52.18 V P07
2025-01-07 19:25:30 C 09 08 13.498 +14 32 04.42 V P07
2025-01-07 19:45:18 C 09 08 12.63 +14 32 04.5 V D29
2025-01-07 20:05:39 C 09 08 11.81 +14 32 09.8 V D29
2025-01-07 20:24:55 C 09 08 11.057 +14 32 19.68 V P07
2025-01-07 20:26:01 C 09 08 10.98 +14 32 15.1 V D29
2025-01-08 04:48:21 C 09 07 51.442 +14 34 32.38 V W68
2025-01-08 04:50:59 C 09 07 51.329 +14 34 33.10 V W68
2025-01-08 05:25:24 C 09 07 49.920 +14 34 42.13 V W68
2025-01-08 05:29:56 C 09 07 49.730 +14 34 43.46 V W68
2025-01-08 19:11:16 C 09 07 16.62 +14 38 16.1 V D29
2025-01-08 19:31:38 C 09 07 15.77 +14 38 21.5 V D29
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)