IAA RAS IAA Minor Planet Database

136900 (1998 HL49)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6367117241 ± 8.56e-09
Semi-major axis (a)1.7474083419 AU ± 7.92e-10
Inclination (i)10.97962249° ± 1.81e-06
Long. of Asc. Node (Ω)205.93934994° ± 7.13e-06
Arg. of Perihelion (ω)239.26481064° ± 7.17e-06
Mean Anomaly (M)58.90437048° ± 2.72e-06
Mean Motion (n)0.4266980608°/day ± 2.90e-10
Perihelion dist (q)0.63481296 AU ± 1.50e-08
Aphelion dist (Q)2.86000372 AU ± 1.50e-08
Orbital Period2.30989164 yr ± 1.57e-09
Physical Parameters
H (abs. magnitude)17.39
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.235″
Uncertainty0
Orbit TypeApollo
MOID0.084573 AU
Observations Used833
Oppositions14
Arc Total1998-2023
First Observation Used1998-04-30
Last Observation Used2023-06-07
Observations (895)
Date Type RA Dec Mag Band Observatory
2020-08-24 10:33:47 C 21 22 03.08 +15 50 08.4 – V T08
2020-08-24 20:39:26 C 21 20 51.75 +15 49 42.4 – – 557
2020-08-24 23:04:12 C 21 20 33.87 +15 49 37.4 – – 557
2020-08-25 00:20:01 C 21 20 24.50 +15 49 34.0 – – 557
2020-08-25 01:23:33 C 21 20 16.68 +15 49 30.8 – – 557
2020-08-25 02:09:56 C 21 20 11.00 +15 49 28.4 – – 557
2020-08-25 19:45:22 C 21 18 03.68 +15 48 32.6 – – 557
2020-08-25 20:30:59 C 21 17 58.01 +15 48 31.3 – V 130
2020-08-25 20:33:50 C 21 17 57.66 +15 48 30.9 – V 130
2020-08-25 20:36:42 C 21 17 57.28 +15 48 30.9 – V 130
2020-08-25 20:39:34 C 21 17 56.92 +15 48 30.6 – V 130
2020-08-25 20:40:36 C 21 17 56.88 +15 48 31.1 – V C95
2020-08-25 20:42:24 C 21 17 56.65 +15 48 30.7 – V C95
2020-08-25 20:44:07 C 21 17 56.23 +15 48 29.2 – – 557
2020-08-25 20:44:10 C 21 17 56.42 +15 48 30.8 – V C95
2020-08-25 20:45:58 C 21 17 56.21 +15 48 30.4 – V C95
2020-08-25 20:47:43 C 21 17 55.94 +15 48 30.6 – V C95
2020-08-25 20:49:31 C 21 17 55.74 +15 48 30.1 – V C95
2020-08-25 20:51:17 C 21 17 55.52 +15 48 30.5 – V C95
2020-08-25 22:06:51 C 21 17 45.78 +15 48 25.5 – V 160
2020-08-25 22:08:35 C 21 17 45.56 +15 48 25.3 – V 160
2020-08-25 22:10:18 C 21 17 45.34 +15 48 25.3 – V 160
2020-08-26 05:29:57 C 21 16 50.98 +15 47 56.3 – V 703
2020-08-26 05:37:08 C 21 16 50.06 +15 47 55.3 – V 703
2020-08-26 05:44:19 C 21 16 49.10 +15 47 54.7 – V 703
2020-08-26 05:51:30 C 21 16 48.17 +15 47 54.1 – V 703
2020-08-26 10:05:37 C 21 16 15.98 +15 47 37.0 – V T05
2020-08-26 10:09:54 C 21 16 15.41 +15 47 36.5 – V T05
2020-08-26 10:33:00 C 21 16 12.39 +15 47 34.5 – V T05
2020-08-26 20:56:15 C 21 14 54.37 +15 46 27.2 – V 160
2020-08-26 20:59:10 C 21 14 53.99 +15 46 27.0 – V 160
2020-08-26 21:02:05 C 21 14 53.61 +15 46 26.7 – V 160
2020-08-27 04:22:58 C 21 13 57.53 +15 45 41.9 – V G96
2020-08-27 04:31:10 C 21 13 56.44 +15 45 41.0 – V G96
2020-08-27 04:39:24 C 21 13 55.35 +15 45 40.2 – V G96
2020-08-27 04:47:36 C 21 13 54.25 +15 45 39.3 – V G96
2020-08-27 20:57:00 C 21 11 48.41 +15 43 32.3 – V 160
2020-08-27 20:59:54 C 21 11 48.01 +15 43 31.9 – V 160
2020-08-27 21:02:49 C 21 11 47.62 +15 43 31.6 – V 160
2020-08-27 23:31:10 C 21 11 27.48 +15 43 08.3 – – 557
2020-08-28 00:19:03 C 21 11 21.03 +15 43 01.0 – – 557
2020-08-28 02:25:16 C 21 11 04.12 +15 42 40.9 – – 557
2020-08-28 04:21:53 C 21 10 50.14 +15 42 31.2 – V 703
2020-08-28 04:40:27 C 21 10 47.49 +15 42 28.8 – V 703
2020-08-28 04:49:44 C 21 10 46.31 +15 42 27.1 – V 703
2020-08-28 09:34:07 C 21 10 08.04 +15 41 47.6 – V T08
2020-08-28 09:49:37 C 21 10 05.89 +15 41 45.1 – V T08
2020-08-28 09:57:35 C 21 10 04.78 +15 41 43.9 – V T08
2020-08-28 10:01:36 C 21 10 04.23 +15 41 43.1 – V T08
2020-08-28 15:23:15 C 21 09 22.33 +15 40 44.8 – V N31