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
2022-02-14 09:27:31 C 05 18 39.57 +17 13 58.5 V T08
2022-02-14 19:13:08 C 05 18 43.15 +17 15 45.3 q M04
2022-02-14 19:33:03 C 05 18 43.22 +17 15 48.9 q M04
2022-02-14 19:52:50 C 05 18 43.32 +17 15 52.4 q M04
2022-02-15 03:36:58 C 05 18 46.21 +17 17 18.2 U I41
2022-02-15 05:06:29 C 05 18 46.68 +17 17 34.6 U I41
2022-02-15 07:13:00 C 05 18 47.53 +17 17 59.2 V T05
2022-02-15 07:17:36 C 05 18 47.55 +17 17 59.7 V T05
2022-02-15 07:27:35 C 05 18 47.61 +17 18 01.7 V T05
2022-02-15 07:52:52 C 05 18 47.73 +17 18 06.1 V T05
2022-02-17 02:30:00 C 05 19 07.342 +17 25 58.15 V W68
2022-02-17 02:33:56 C 05 19 07.356 +17 25 59.16 V W68
2022-02-17 02:41:11 C 05 19 07.418 +17 26 00.42 V W68
2022-02-17 02:55:07 C 05 19 07.536 +17 26 02.76 V W68
2022-02-17 08:53:19 C 05 19 10.69 +17 27 04.7 V T08
2022-02-17 09:17:13 C 05 19 10.88 +17 27 08.5 V T08
2022-02-17 09:30:34 C 05 19 10.97 +17 27 11.5 V T08
2022-02-17 09:38:00 C 05 19 11.07 +17 27 12.5 V T08
2022-02-19 18:30:32 C 05 19 47.20 +17 37 31.1 V K74
2022-02-19 18:33:46 C 05 19 47.23 +17 37 31.7 V K74
2022-02-20 07:05:12 C 05 19 56.30 +17 39 49.4 V T05
2022-02-20 07:09:17 C 05 19 56.35 +17 39 50.0 V T05
2022-02-20 07:22:05 C 05 19 56.49 +17 39 52.7 V T08
2022-02-20 07:23:21 C 05 19 56.51 +17 39 52.6 V T05
2022-02-20 07:26:41 C 05 19 56.55 +17 39 53.4 V T08
2022-02-20 07:37:52 C 05 19 56.68 +17 39 55.4 V T08
2022-02-20 07:52:24 C 05 19 56.84 +17 39 57.8 V T08
2022-02-20 07:56:53 C 05 19 56.89 +17 39 58.6 V T05
2022-02-21 06:59:26 C 05 20 15.08 +17 44 08.1 V T08
2022-02-21 07:22:46 C 05 20 15.34 +17 44 12.0 V T08
2022-02-21 08:05:52 C 05 20 15.90 +17 44 19.6 V T08
2022-02-21 21:37:09 C 05 20 27.29 +17 46 43.3 X L63
2022-02-21 21:46:09 C 05 20 27.44 +17 46 45.0 X L63
2022-02-21 21:54:38 C 05 20 27.54 +17 46 46.5 X L63
2022-02-22 06:04:00 C 05 20 34.78 +17 48 15.8 V T05
2022-02-22 06:09:15 C 05 20 34.86 +17 48 17.1 V T05
2022-02-22 06:19:12 C 05 20 35.00 +17 48 18.8 V T05
2022-02-22 06:35:03 C 05 20 35.20 +17 48 21.6 V T05
2022-02-22 07:13:56 C 05 20 35.73 +17 48 28.5 V T08
2022-02-22 07:28:36 C 05 20 35.93 +17 48 31.1 V T08
2022-02-22 08:37:21 C 05 20 36.88 +17 48 43.1 V T08
2022-02-23 06:05:17 C 05 20 56.83 +17 52 33.2 V T05
2022-02-23 06:09:59 C 05 20 56.89 +17 52 34.0 V T05
2022-02-23 06:18:33 C 05 20 57.02 +17 52 35.5 V T05
2022-02-23 06:33:04 C 05 20 57.23 +17 52 38.2 V T05
2022-02-25 00:16:34 C 05 21 39.382 +18 00 05.15 V W68
2022-02-25 00:20:28 C 05 21 39.425 +18 00 06.01 V W68
2022-02-25 00:29:35 C 05 21 39.590 +18 00 07.45 V W68
2022-02-25 00:44:31 C 05 21 39.833 +18 00 09.86 V W68
2022-02-25 07:06:27 C 05 21 46.62 +18 01 13.7 V T08
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)