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
2025-02-26 22:43:15 C 08 10 55.973 +20 17 34.12 V R17
2025-02-26 23:04:17 C 08 10 55.224 +20 17 38.54 V R17
2025-02-27 04:32:57 C 08 10 44.173 +20 18 46.51 V G96
2025-02-27 04:42:46 C 08 10 43.828 +20 18 48.67 V G96
2025-02-27 04:50:55 C 08 10 43.540 +20 18 50.33 V G96
2025-02-27 04:59:05 C 08 10 43.255 +20 18 52.06 V G96
2025-02-27 06:22:55 C 08 10 40.578 +20 19 10.36 X F52
2025-02-27 06:40:22 C 08 10 39.968 +20 19 14.06 X F52
2025-02-27 06:57:59 C 08 10 39.348 +20 19 17.66 X F52
2025-02-27 08:42:54 C 08 10 35.681 +20 19 39.54 V T05
2025-02-27 08:47:35 C 08 10 35.518 +20 19 40.37 V T05
2025-02-27 08:55:32 C 08 10 35.237 +20 19 42.02 V T05
2025-02-27 09:10:05 C 08 10 34.730 +20 19 44.98 V T05
2025-02-27 19:24:22 B 08 10 14.558 +20 21 49.10 V 160
2025-02-27 19:29:57 B 08 10 14.364 +20 21 50.22 V 160
2025-02-27 19:35:31 B 08 10 14.167 +20 21 51.41 V 160
2025-02-28 08:56:23 C 08 09 47.964 +20 24 35.60 V T05
2025-02-28 09:00:32 C 08 09 47.820 +20 24 36.47 V T05
2025-02-28 09:09:06 C 08 09 47.539 +20 24 38.23 V T05
2025-02-28 09:23:11 C 08 09 47.064 +20 24 41.04 V T05
2025-02-28 13:10:24 C 08 09 40.106 +20 25 27.16 V O51
2025-02-28 13:20:46 C 08 09 39.718 +20 25 29.17 V O51
2025-02-28 13:31:15 C 08 09 39.326 +20 25 31.40 V O51
2025-02-28 21:12:55 C 08 09 24.559 +20 26 59.78 Z C23
2025-02-28 21:48:12 C 08 09 23.453 +20 27 07.24 Z C23
2025-02-28 23:05:45 C 08 09 20.971 +20 27 22.46 Z C23
2025-03-01 04:39:44 C 08 09 10.649 +20 28 29.68 V G96
2025-03-01 04:47:50 C 08 09 10.386 +20 28 31.30 V G96
2025-03-01 04:55:54 C 08 09 10.120 +20 28 32.88 V G96
2025-03-01 05:04:00 C 08 09 09.868 +20 28 34.36 V G96
2025-03-01 08:24:47 C 08 09 03.612 +20 29 15.00 V T08
2025-03-01 08:30:46 C 08 09 03.418 +20 29 16.12 V T08
2025-03-01 08:38:45 C 08 09 03.163 +20 29 17.70 V T08
2025-03-01 08:57:24 C 08 09 02.561 +20 29 21.30 V T08
2025-03-01 15:12:23 C 08 08 51.115 +20 30 34.92 V O51
2025-03-01 15:19:43 C 08 08 50.878 +20 30 36.11 V O51
2025-03-01 15:26:34 C 08 08 50.681 +20 30 37.62 V O51
2025-03-01 17:54:12 C 08 08 46.28 +20 31 03.9 X D04
2025-03-01 18:00:27 C 08 08 46.06 +20 31 04.4 X D04
2025-03-01 18:03:35 C 08 08 45.95 +20 31 05.6 X D04
2025-03-01 18:16:06 C 08 08 45.65 +20 31 06.8 X D04
2025-03-01 22:11:10 C 08 08 38.398 +20 31 52.36 Z C23
2025-03-01 22:30:50 C 08 08 37.610 +20 31 55.45 Z C23
2025-03-02 09:44:10 C 08 08 17.671 +20 34 06.96 V T05
2025-03-02 09:51:54 C 08 08 17.426 +20 34 08.36 V T05
2025-03-02 10:01:09 C 08 08 17.138 +20 34 10.24 V T05
2025-03-02 10:14:39 C 08 08 16.723 +20 34 12.76 V T05
2025-03-02 17:47:25 C 08 08 03.83 +20 35 35.7 X G02
2025-03-02 17:53:11 C 08 08 03.66 +20 35 36.7 X G02
2025-03-02 17:58:41 C 08 08 03.50 +20 35 37.8 X G02
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)