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
2024-11-24 15:41:18 C 09 20 56.578 +12 33 16.16 V T05
2024-11-24 15:45:57 C 09 20 56.626 +12 33 15.80 V T05
2024-11-24 15:49:52 C 09 20 56.671 +12 33 15.95 V T05
2024-11-26 13:14:41 C 09 21 32.513 +12 32 02.58 V T05
2024-11-26 13:17:25 C 09 21 32.544 +12 32 02.44 V T05
2024-11-26 13:21:23 C 09 21 32.585 +12 32 02.40 V T05
2024-11-26 13:39:25 C 09 21 32.784 +12 32 02.18 V T05
2024-11-30 12:40:54 C 09 22 29.777 +12 31 04.12 V T05
2024-11-30 13:15:04 C 09 22 29.983 +12 31 04.15 V T05
2024-11-30 13:17:40 C 09 22 30.005 +12 31 03.94 V T05
2024-11-30 13:22:14 C 09 22 30.046 +12 31 04.04 V T05
2024-12-03 07:26:25 C 09 22 54.883 +12 31 47.57 V W68
2024-12-03 07:31:41 C 09 22 54.905 +12 31 47.71 V W68
2024-12-03 07:40:10 C 09 22 54.941 +12 31 47.89 V W68
2024-12-03 08:06:01 C 09 22 55.022 +12 31 48.29 V W68
2024-12-03 08:21:16 C 09 22 55.078 +12 31 48.90 V W68
2024-12-07 07:08:16 C 09 23 08.729 +12 34 48.14 V W68
2024-12-07 07:19:17 C 09 23 08.722 +12 34 48.65 V W68
2024-12-07 07:25:10 C 09 23 08.717 +12 34 48.76 V W68
2024-12-07 07:33:00 C 09 23 08.714 +12 34 48.94 V W68
2024-12-08 12:49:41 C 09 23 07.572 +12 36 10.91 V T05
2024-12-08 12:52:20 C 09 23 07.562 +12 36 11.16 V T05
2024-12-08 12:56:53 C 09 23 07.546 +12 36 11.34 V T05
2024-12-08 13:04:45 C 09 23 07.531 +12 36 11.77 V T05
2024-12-09 01:32:10 C 09 23 06.216 +12 36 56.34 V M22
2024-12-09 01:36:45 C 09 23 06.199 +12 36 56.56 V M22
2024-12-09 01:52:51 C 09 23 06.149 +12 36 57.38 V M22
2024-12-09 02:18:16 C 09 23 06.043 +12 36 58.93 V M22
2024-12-09 13:00:18 C 09 23 04.637 +12 37 32.26 X F51
2024-12-09 13:16:25 C 09 23 04.578 +12 37 33.29 X F51
2024-12-09 13:32:41 C 09 23 04.515 +12 37 34.25 X F51
2024-12-09 13:49:09 C 09 23 04.454 +12 37 35.24 X F51
2024-12-10 11:20:10 C 09 23 00.466 +12 38 56.22 V T08
2024-12-10 11:23:35 C 09 23 00.466 +12 38 56.47 V T08
2024-12-10 11:56:20 C 09 23 00.317 +12 38 58.60 V T08
2024-12-10 12:21:33 C 09 23 00.194 +12 39 00.47 V T08
2024-12-12 12:32:14 C 09 22 45.670 +12 42 31.50 V T05
2024-12-12 12:34:51 C 09 22 45.662 +12 42 31.72 V T05
2024-12-12 12:39:25 C 09 22 45.629 +12 42 32.11 V T05
2024-12-12 12:47:17 C 09 22 45.569 +12 42 32.65 V T05
2024-12-12 14:42:32 C 09 22 44.671 +12 42 42.30 V T08
2024-12-12 14:51:42 C 09 22 44.599 +12 42 43.02 V T08
2024-12-12 15:35:30 C 09 22 44.285 +12 42 46.48 V T08
2024-12-14 12:33:04 C 09 22 24.074 +12 46 42.28 V T08
2024-12-14 12:35:42 C 09 22 24.046 +12 46 42.53 V T08
2024-12-14 12:39:40 C 09 22 24.002 +12 46 43.03 V T08
2024-12-15 06:36:07 C 09 22 14.100 +12 48 30.78 V W68
2024-12-15 06:38:43 C 09 22 14.086 +12 48 31.14 V W68
2024-12-15 06:43:56 C 09 22 14.021 +12 48 31.32 V W68
2024-12-15 07:01:25 C 09 22 13.826 +12 48 33.37 V W68
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)