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
2022-01-22 22:06:30 C 05 24 01.79 +15 34 06.7 a 233
2022-01-24 09:54:39 C 05 23 07.87 +15 40 39.1 V T05
2022-01-24 09:59:17 C 05 23 07.75 +15 40 39.7 V T05
2022-01-24 10:08:30 C 05 23 07.53 +15 40 41.5 V T05
2022-01-24 10:24:21 C 05 23 07.12 +15 40 44.3 V T05
2022-01-25 16:24:35 C 05 22 26.05 +15 46 12.9 q C97
2022-01-25 16:25:47 C 05 22 25.99 +15 46 13.5 q C97
2022-01-25 16:27:00 C 05 22 25.96 +15 46 13.8 q C97
2022-01-25 16:29:25 C 05 22 25.91 +15 46 14.5 q C97
2022-01-25 16:30:38 C 05 22 25.86 +15 46 14.6 q C97
2022-01-25 16:31:50 C 05 22 25.84 +15 46 14.7 q C97
2022-01-25 16:33:03 C 05 22 25.81 +15 46 15.8 q C97
2022-01-25 19:59:30 C 05 22 21.26 +15 46 51.0 V 160
2022-01-25 20:02:43 C 05 22 21.18 +15 46 51.6 V 160
2022-01-25 20:06:10 C 05 22 21.09 +15 46 52.2 V 160
2022-01-26 02:28:51 C 05 22 12.93 +15 48 03.1 V G96
2022-01-26 02:36:57 C 05 22 12.75 +15 48 04.6 V G96
2022-01-26 02:45:03 C 05 22 12.57 +15 48 06.0 V G96
2022-01-26 02:53:08 C 05 22 12.35 +15 48 07.8 V G96
2022-01-26 06:38:43 C 05 22 07.52 +15 48 50.2 V T08
2022-01-26 06:41:23 C 05 22 07.45 +15 48 50.8 V T08
2022-01-26 06:46:07 C 05 22 07.35 +15 48 51.7 V T08
2022-01-26 07:08:45 C 05 22 06.84 +15 48 55.9 V T08
2022-01-27 08:13:53 C 05 21 36.01 +15 53 32.2 V T05
2022-01-27 08:18:32 C 05 21 35.90 +15 53 33.0 V T05
2022-01-27 08:27:11 C 05 21 35.73 +15 53 34.6 V T05
2022-01-27 08:54:27 C 05 21 35.15 +15 53 39.6 V T05
2022-01-28 07:46:22 C 05 21 09.29 +15 57 52.6 V T05
2022-01-28 07:51:01 C 05 21 09.20 +15 57 53.5 V T05
2022-01-28 08:03:38 C 05 21 08.95 +15 57 55.7 V T05
2022-01-28 08:18:26 C 05 21 08.66 +15 57 58.4 V T05
2022-01-28 21:01:41 C 05 20 55.04 +16 00 17.8 V 160
2022-01-28 21:04:44 C 05 20 55.03 +16 00 18.1 V 160
2022-01-28 21:08:02 C 05 20 55.02 +16 00 18.7 V 160
2022-01-29 07:47:00 C 05 20 44.10 +16 02 18.8 V T08
2022-01-29 07:52:19 C 05 20 44.00 +16 02 19.7 V T08
2022-01-29 08:04:16 C 05 20 43.78 +16 02 22.0 V T08
2022-01-29 08:21:39 C 05 20 43.48 +16 02 25.2 V T08
2022-01-29 18:08:17 C 05 20 34.09 +16 04 11.6 q M04
2022-01-29 22:26:19 C 05 20 29.67 +16 04 59.7 q M04
2022-01-30 07:25:45 C 05 20 21.41 +16 06 40.9 V T05
2022-01-30 07:39:40 C 05 20 21.16 +16 06 43.9 V T05
2022-01-30 07:49:51 C 05 20 20.99 +16 06 45.7 V T05
2022-01-30 07:54:29 C 05 20 20.92 +16 06 46.7 V T05
2022-01-30 07:55:48 C 05 20 20.88 +16 06 46.9 V T05
2022-01-30 09:07:20 C 05 20 19.70 +16 07 00.0 V T05
2022-01-30 12:40:19 C 05 20 16.66 +16 07 38.6 V D29
2022-01-30 13:09:35 C 05 20 16.18 +16 07 44.0 V D29
2022-01-30 13:38:52 C 05 20 15.70 +16 07 49.4 V D29
2022-01-30 18:10:24 C 05 20 11.91 +16 08 39.0 q M04
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)