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
2020-08-10 00:42:22 C 21 53 50.34 +14 51 52.0 – V 160
2020-08-10 00:45:24 C 21 53 50.02 +14 51 52.5 – V 160
2020-08-10 00:48:26 C 21 53 49.82 +14 51 52.9 – V 160
2020-08-10 05:37:58 C 21 53 30.64 +14 53 24.0 – V V93
2020-08-10 06:26:58 C 21 53 27.15 +14 53 39.3 – V V93
2020-08-10 07:15:29 C 21 53 23.68 +14 53 54.5 – V V93
2020-08-10 11:21:12 C 21 53 06.90 +14 55 15.0 – V T05
2020-08-10 11:25:49 C 21 53 06.55 +14 55 16.4 – V T05
2020-08-10 11:34:33 C 21 53 05.91 +14 55 19.3 – V T05
2020-08-10 12:24:25 C 21 53 02.31 +14 55 34.2 – V T05
2020-08-12 10:21:52 C 21 49 44.06 +15 08 52.0 – V U68
2020-08-12 10:22:14 C 21 49 44.08 +15 08 52.2 – V U68
2020-08-12 10:26:43 C 21 49 43.68 +15 08 53.4 – V U68
2020-08-12 10:27:05 C 21 49 43.63 +15 08 53.8 – V U68
2020-08-12 11:26:19 C 21 49 39.46 +15 09 14.7 – V T08
2020-08-12 11:31:03 C 21 49 39.10 +15 09 15.9 – V T08
2020-08-12 11:39:42 C 21 49 38.41 +15 09 18.4 – V T08
2020-08-12 22:40:30 C 21 48 48.60 +15 12 11.2 – V 160
2020-08-12 22:43:25 C 21 48 48.41 +15 12 11.5 – V 160
2020-08-12 22:46:18 C 21 48 48.20 +15 12 11.9 – V 160
2020-08-14 07:22:33 C 21 46 13.68 +15 20 27.6 – V U63
2020-08-14 07:27:49 C 21 46 13.18 +15 20 28.9 – V U63
2020-08-14 08:39:31 C 21 46 07.16 +15 20 45.9 – V U63
2020-08-14 08:44:46 C 21 46 06.68 +15 20 47.3 – V U63
2020-08-14 15:28:34 C 21 45 33.89 +15 22 26.5 – q D29
2020-08-14 15:48:55 C 21 45 32.13 +15 22 31.4 – q D29
2020-08-14 16:09:17 C 21 45 30.36 +15 22 36.2 – q D29
2020-08-15 09:47:40 C 21 44 01.22 +15 26 33.9 – V U68
2020-08-15 09:52:33 C 21 44 00.80 +15 26 35.0 – V U68
2020-08-15 11:02:11 C 21 43 54.66 +15 26 49.8 – V U68
2020-08-15 11:07:03 C 21 43 54.19 +15 26 50.9 – V U68
2020-08-16 07:37:33 C 21 42 08.18 +15 31 05.8 – V U63
2020-08-16 07:37:33 C 21 42 08.18 +15 31 06.3 – V U63
2020-08-16 07:42:48 C 21 42 07.63 +15 31 07.2 – V U63
2020-08-16 07:42:48 C 21 42 07.66 +15 31 07.3 – V U63
2020-08-16 08:54:32 C 21 42 01.11 +15 31 20.9 – V U63
2020-08-16 08:54:32 C 21 42 01.11 +15 31 21.3 – V U63
2020-08-16 08:59:48 C 21 42 00.57 +15 31 21.9 – V U63
2020-08-16 08:59:48 C 21 42 00.58 +15 31 22.2 – V U63
2020-08-16 10:52:15 C 21 41 50.70 +15 31 52.0 – V T08
2020-08-16 10:57:34 C 21 41 50.19 +15 31 53.1 – V T08
2020-08-16 11:09:42 C 21 41 49.07 +15 31 55.3 – V T08
2020-08-16 11:29:58 C 21 41 47.16 +15 31 59.3 – V T08
2020-08-16 22:13:13 C 21 40 50.04 +15 33 55.4 – V 160
2020-08-16 22:16:06 C 21 40 49.78 +15 33 56.1 – V 160
2020-08-16 22:19:00 C 21 40 49.50 +15 33 56.5 – V 160
2020-08-17 02:09:08 C 21 40 29.10 +15 34 40.3 – q W46
2020-08-17 02:24:39 C 21 40 27.64 +15 34 43.3 – q W46
2020-08-17 02:38:51 C 21 40 26.30 +15 34 46.2 – q W46
2020-08-18 09:22:48 C 21 37 33.78 +15 39 58.5 – V T05