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
2018-05-21 11:03:17 C 14 54 17.54 +13 41 10.9 U T05
2018-05-21 11:19:44 C 14 54 16.74 +13 41 16.5 U T05
2018-05-21 11:32:52 C 14 54 16.11 +13 41 20.9 U T05
2018-05-22 05:47:47 C 14 53 29.88 +13 47 25.8 U G96
2018-05-22 05:55:08 C 14 53 29.52 +13 47 28.4 U G96
2018-05-22 06:02:32 C 14 53 29.16 +13 47 30.7 U G96
2018-05-22 06:09:54 C 14 53 28.81 +13 47 33.0 U G96
2018-05-23 05:50:10 C 14 52 28.21 +13 54 53.1 U 703
2018-05-23 05:57:51 C 14 52 27.84 +13 54 55.8 U 703
2018-05-23 06:05:28 C 14 52 27.48 +13 54 58.1 U 703
2018-05-23 06:13:02 C 14 52 27.11 +13 55 00.3 U 703
2018-05-23 10:11:56 C 14 52 16.60 +13 56 14.4 U T08
2018-05-23 10:33:08 C 14 52 15.58 +13 56 20.4 U T08
2018-05-23 10:45:01 C 14 52 15.00 +13 56 23.7 U T08
2018-05-23 11:00:24 C 14 52 14.27 +13 56 28.0 U T08
2018-05-24 21:20:21 C 14 50 48.58 +14 05 29.3 12.1 U K46
2018-05-24 21:28:52 C 14 50 48.19 +14 05 31.5 12.2 U K46
2018-05-24 21:30:22 C 14 50 48.12 +14 05 31.8 12.1 U K46
2018-05-25 04:11:32 C 14 50 30.87 +14 07 38.3 q 834
2018-05-25 04:48:44 C 14 50 29.15 +14 07 46.9 q 834
2018-05-25 10:48:11 C 14 50 14.36 +14 08 51.2 U T05
2018-05-25 11:01:32 C 14 50 13.74 +14 08 54.1 U T05
2018-05-25 11:20:52 C 14 50 12.84 +14 08 58.3 U T05
2018-05-25 11:30:52 C 14 50 12.38 +14 09 00.4 U T05
2018-05-25 21:47:53 C 14 49 47.96 +14 11 09.5 q 160
2018-05-25 21:50:29 C 14 49 47.82 +14 11 10.2 q 160
2018-05-25 21:53:03 C 14 49 47.72 +14 11 10.6 q 160
2018-05-25 22:25:52 C 14 49 46.24 +14 11 15.6 13.4 U K46
2018-05-25 23:22:39 C 14 49 43.68 +14 11 27.5 12.1 U K46
2018-05-25 23:56:40 C 14 49 42.16 +14 11 34.5 12.3 U K46
2018-05-26 00:52:38 C 14 49 39.69 +14 11 45.8 13.3 U K46
2018-05-26 21:33:21 C 14 48 50.30 +14 15 51.5 12.3 U K46
2018-05-26 22:36:22 C 14 48 47.50 +14 16 03.0 13.1 U K46
2018-05-26 23:55:22 C 14 48 44.02 +14 16 16.9 12.2 U K46
2018-05-27 10:45:28 C 14 48 17.98 +14 18 20.5 U T08
2018-05-27 11:00:35 C 14 48 17.30 +14 18 22.9 U T08
2018-05-27 11:07:24 C 14 48 16.98 +14 18 23.9 U T08
2018-05-27 11:24:37 C 14 48 16.22 +14 18 26.6 U T08
2018-05-31 10:02:39 C 14 44 43.04 +14 28 08.0 U T08
2018-05-31 10:18:59 C 14 44 42.37 +14 28 08.5 U T08
2018-05-31 10:35:29 C 14 44 41.69 +14 28 08.9 U T08
2018-05-31 10:52:25 C 14 44 41.00 +14 28 09.3 U T08
2018-06-02 10:05:09 C 14 43 04.70 +14 28 22.2 U T05
2018-06-02 10:22:05 C 14 43 04.04 +14 28 21.5 U T05
2018-06-02 10:38:53 C 14 43 03.40 +14 28 20.8 U T05
2018-06-02 10:56:19 C 14 43 02.73 +14 28 20.1 U T05
2018-06-03 20:46:48 C 14 41 59.31 +14 26 25.9 q K73
2018-06-03 20:50:22 C 14 41 59.23 +14 26 25.5 q K73
2018-06-03 20:57:48 C 14 41 59.02 +14 26 24.9 q K73
2018-06-03 21:01:16 C 14 41 58.85 +14 26 24.7 q K73
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)