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
2018-07-08 00:46:26 S 14 47 28.34 +05 48 17.3 L C51
2018-07-08 02:19:57 S 14 47 33.04 +05 46 30.0 L C51
2018-07-08 03:54:00 S 14 47 37.79 +05 44 41.8 L C51
2018-07-08 03:54:12 S 14 47 37.82 +05 44 41.1 L C51
2018-07-08 04:08:24 C 14 47 37.99 +05 44 08.5 463
2018-07-08 05:29:00 S 14 47 42.64 +05 42 49.9 L C51
2018-07-08 05:32:02 C 14 47 41.82 +05 42 33.8 u 719
2018-07-08 06:24:19 C 14 47 44.25 +05 41 33.0 u 719
2018-07-08 07:03:15 S 14 47 47.46 +05 41 00.5 L C51
2018-07-08 08:37:30 S 14 47 52.27 +05 39 10.8 L C51
2018-07-08 11:45:16 S 14 48 01.94 +05 35 33.1 L C51
2018-07-08 14:54:19 S 14 48 11.74 +05 31 50.8 L C51
2018-07-08 18:02:49 S 14 48 21.57 +05 28 09.2 L C51
2018-07-09 00:19:38 S 14 48 41.47 +05 20 44.9 L C51
2018-07-10 05:58:01 C 14 50 17.94 +04 44 53.9 u 719
2018-07-10 06:15:01 C 14 50 18.82 +04 44 33.0 u 719
2018-07-11 08:43:19 C 14 51 51.52 +04 11 56.3 U T05
2018-07-11 08:58:46 C 14 51 52.36 +04 11 36.9 U T05
2018-07-11 09:16:31 C 14 51 53.33 +04 11 14.5 U T05
2018-07-11 09:33:10 C 14 51 54.25 +04 10 53.5 U T05
2018-07-11 22:12:03 C 14 52 40.92 +03 54 45.0 q C23
2018-07-11 22:15:58 C 14 52 41.14 +03 54 40.0 q C23
2018-07-11 22:19:24 C 14 52 41.38 +03 54 35.8 q C23
2018-07-12 03:34:51 C 14 53 01.29 +03 48 00.8 463
2018-07-12 03:42:23 C 14 53 01.89 +03 47 47.3 463
2018-07-12 03:54:01 C 14 53 02.54 +03 47 32.4 463
2018-07-13 08:19:24 C 14 54 50.96 +03 10 59.7 U T08
2018-07-13 08:34:47 C 14 54 51.88 +03 10 39.6 U T08
2018-07-13 08:50:25 C 14 54 52.82 +03 10 19.0 U T08
2018-07-13 09:06:02 C 14 54 53.76 +03 09 58.5 U T08
2018-07-14 20:43:04 C 14 57 19.65 +02 22 25.4 q K73
2018-07-14 20:47:43 C 14 57 19.94 +02 22 19.2 q K73
2018-07-14 20:55:01 C 14 57 20.43 +02 22 09.0 q K73
2018-07-14 21:01:12 C 14 57 20.85 +02 22 01.1 q K73
2018-07-14 22:02:45 C 14 57 25.15 +02 20 34.2 12.5 U K46
2018-07-14 22:05:45 C 14 57 25.35 +02 20 30.1 12.4 U K46
2018-07-14 22:07:14 C 14 57 25.45 +02 20 28.1 12.3 U K46
2018-07-15 19:56:33 C 14 58 59.84 +01 50 43.1 q K73
2018-07-15 20:04:08 C 14 59 00.38 +01 50 32.8 q K73
2018-07-15 20:07:30 C 14 59 00.64 +01 50 28.1 q K73
2018-07-15 20:12:16 C 14 59 00.89 +01 50 21.5 q K73
2018-07-15 21:45:35 C 14 59 07.64 +01 48 08.6 q C23
2018-07-15 21:49:30 C 14 59 07.90 +01 48 03.2 q C23
2018-07-15 21:54:23 C 14 59 08.24 +01 47 56.3 q C23
2018-07-15 22:02:41 C 14 59 08.90 +01 47 49.6 d Z35
2018-07-15 22:25:11 C 14 59 10.35 +01 47 19.1 d Z35
2018-07-15 23:08:18 C 14 59 13.46 +01 46 23.0 o Z22
2018-07-15 23:17:25 C 14 59 14.08 +01 46 10.4 o Z22
2018-07-15 23:19:12 C 14 59 14.21 +01 46 08.0 o Z22
2018-07-15 23:20:59 C 14 59 14.32 +01 46 05.6 o Z22
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)