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
2022-02-25 07:15:07 C 05 21 46.76 +18 01 15.3 V T08
2022-02-25 07:19:43 C 05 21 46.85 +18 01 16.2 V T08
2022-02-25 07:38:53 C 05 21 47.18 +18 01 19.6 V T08
2022-02-26 06:18:45 C 05 22 12.56 +18 05 18.6 V T05
2022-02-26 06:24:03 C 05 22 12.67 +18 05 19.4 V T05
2022-02-26 06:34:38 C 05 22 12.86 +18 05 21.4 V T05
2022-02-26 06:39:17 C 05 22 12.93 +18 05 22.1 V T08
2022-02-26 06:43:53 C 05 22 13.00 +18 05 22.7 V T08
2022-02-26 06:50:40 C 05 22 13.14 +18 05 24.1 V T05
2022-02-26 06:51:45 C 05 22 13.13 +18 05 24.2 V T08
2022-02-26 07:09:08 C 05 22 13.44 +18 05 27.4 V T08
2022-02-27 02:37:49 C 05 22 36.43 +18 08 50.5 V G96
2022-02-27 02:46:06 C 05 22 36.58 +18 08 51.9 V G96
2022-02-27 02:54:32 C 05 22 36.75 +18 08 53.4 V G96
2022-02-27 03:02:49 C 05 22 36.91 +18 08 54.8 V G96
2022-02-28 06:00:27 C 05 23 10.21 +18 13 36.4 V T05
2022-02-28 06:07:06 C 05 23 10.33 +18 13 37.7 V T05
2022-02-28 06:15:40 C 05 23 10.52 +18 13 39.3 V T05
2022-02-28 06:30:15 C 05 23 10.79 +18 13 41.4 V T05
2022-03-03 04:35:56 C 05 24 46.06 +18 25 40.9 V 703
2022-03-03 04:56:29 C 05 24 46.57 +18 25 44.4 V 703
2022-03-03 05:04:05 C 05 24 46.74 +18 25 45.5 V 703
2022-03-03 05:09:50 C 05 24 46.90 +18 25 46.2 V 703
2022-03-04 18:19:35 C 05 25 42.50 +18 32 01.6 V K83
2022-03-04 18:23:54 C 05 25 42.63 +18 32 02.3 V K83
2022-03-04 18:28:12 C 05 25 42.73 +18 32 03.5 V K83
2022-03-05 06:14:39 C 05 26 00.96 +18 34 03.0 V T08
2022-03-05 06:19:14 C 05 26 01.09 +18 34 03.8 V T08
2022-03-05 06:27:46 C 05 26 01.30 +18 34 05.5 V T08
2022-03-05 06:42:13 C 05 26 01.66 +18 34 07.7 V T08
2022-03-07 05:52:02 C 05 27 18.25 +18 41 55.6 V T05
2022-03-07 05:56:51 C 05 27 18.37 +18 41 56.7 V T05
2022-03-07 06:06:06 C 05 27 18.61 +18 41 57.7 V T05
2022-03-07 06:41:57 C 05 27 19.58 +18 42 03.7 V T05
2022-03-08 05:46:29 C 05 27 58.99 +18 45 49.9 V T05
2022-03-08 05:47:51 C 05 27 58.97 +18 45 50.0 V T05
2022-03-08 05:50:36 C 05 27 59.09 +18 45 50.5 V T05
2022-03-08 05:51:58 C 05 27 59.12 +18 45 50.5 V T05
2022-03-08 05:59:10 C 05 27 59.34 +18 45 51.9 V T05
2022-03-08 06:00:32 C 05 27 59.29 +18 45 52.7 V T05
2022-03-09 05:58:54 C 05 28 41.51 +18 49 45.2 V T08
2022-03-09 06:02:55 C 05 28 41.63 +18 49 46.1 V T08
2022-03-09 06:13:25 C 05 28 41.93 +18 49 47.4 V T08
2022-03-09 06:48:20 C 05 28 42.91 +18 49 53.0 V T08
2022-03-13 08:14:24 C 05 31 46.97 +19 05 14.8 V T08
2022-03-13 09:20:12 C 05 31 49.20 +19 05 24.6 V T08
2022-03-13 09:26:25 C 05 31 49.33 +19 05 26.1 V T08
2022-03-15 04:15:01 C 05 33 16.60 +19 11 58.0 V G96
2022-03-15 04:23:07 C 05 33 16.87 +19 11 59.1 V G96
2022-03-15 04:31:13 C 05 33 17.15 +19 12 00.4 V G96
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)