4257 Ubasti (1987 QA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4683594313 ± 4.35e-09
Semi-major axis (a)1.6471372987 AU ± 3.96e-10
Inclination (i)40.72180734° ± 5.74e-07
Long. of Asc. Node (Ω)169.14106442° ± 8.38e-07
Arg. of Perihelion (ω)278.95769231° ± 8.58e-07
Mean Anomaly (M)347.42839566° ± 6.71e-07
Mean Motion (n)0.4662486353°/day ± 1.68e-10
Perihelion dist (q)0.87568501 AU ± 7.17e-09
Aphelion dist (Q)2.41858959 AU ± 7.19e-09
Orbital Period2.11394996 yr ± 7.62e-10
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.081″
Uncertainty0
Orbit TypeApollo
MOID0.169642 AU
Observations Used2750
Gaia Obs Used109
Oppositions15
Arc Total1987-2026
First Observation Used1987-08-23
Last Observation Used2026-04-08
Observations (2997)
Date Type RA Dec Mag Band Observatory
2025-09-12 20:17:48 B 23 15 41.00 -05 27 28.1 X L76
2025-09-12 20:20:40 B 23 15 40.80 -05 27 40.2 X L76
2025-09-12 20:23:32 B 23 15 40.61 -05 27 52.2 X L76
2025-09-12 20:26:24 B 23 15 40.41 -05 28 04.3 X L76
2025-09-13 01:08:57 C 23 15 21.643 -05 47 26.66 V M22
2025-09-13 01:27:58 C 23 15 20.362 -05 48 47.05 V M22
2025-09-13 02:08:41 C 23 15 17.654 -05 51 39.24 V M22
2025-09-13 02:26:45 C 23 15 16.457 -05 52 55.67 V M22
2025-09-13 03:11:09 C 23 15 14.99 -05 56 05.5 834
2025-09-13 03:45:10 C 23 15 12.62 -05 58 30.1 834
2025-09-13 19:43:03 C 23 14 11.83 -07 07 28.6 X D04
2025-09-13 19:46:02 B 23 14 11.69 -07 07 42.6 X L99
2025-09-13 19:47:19 C 23 14 11.53 -07 07 47.5 X D04
2025-09-13 19:47:22 B 23 14 11.62 -07 07 48.3 X L99
2025-09-13 19:48:42 B 23 14 11.51 -07 07 54.1 X L99
2025-09-13 19:50:02 B 23 14 11.33 -07 07 59.5 X L99
2025-09-13 19:51:22 B 23 14 11.40 -07 08 06.0 X L99
2025-09-13 19:51:34 C 23 14 11.24 -07 08 05.7 X D04
2025-09-13 19:53:41 C 23 14 11.09 -07 08 15.1 X D04
2025-09-13 19:55:49 C 23 14 10.94 -07 08 24.6 X D04
2025-09-13 19:57:56 C 23 14 10.78 -07 08 34.0 X D04
2025-09-13 20:00:03 C 23 14 10.63 -07 08 42.9 X D04
2025-09-13 20:02:11 C 23 14 10.48 -07 08 52.1 X D04
2025-09-13 20:04:18 C 23 14 10.33 -07 09 01.5 X D04
2025-09-13 20:06:25 C 23 14 10.18 -07 09 10.4 X D04
2025-09-13 20:17:04 C 23 14 09.73 -07 09 56.7 V M32
2025-09-13 20:19:27 C 23 14 09.58 -07 10 07.1 V M32
2025-09-13 20:22:38 C 23 14 09.35 -07 10 21.1 V M32
2025-09-13 20:25:26 C 23 14 09.16 -07 10 33.2 V M32
2025-09-13 20:28:37 C 23 14 08.95 -07 10 47.1 V M32
2025-09-14 05:09:18 B 23 13 35.352 -07 48 35.17 V U62
2025-09-14 06:03:22 B 23 13 31.536 -07 52 32.95 V U62
2025-09-14 06:52:15 C 23 13 27.844 -07 56 06.97 V 703
2025-09-14 06:55:31 C 23 13 27.606 -07 56 21.52 V 703
2025-09-14 06:58:47 C 23 13 27.379 -07 56 35.92 V 703
2025-09-14 07:01:49 B 23 13 27.355 -07 56 49.63 V U62
2025-09-14 07:02:03 C 23 13 27.188 -07 56 50.32 V 703
2025-09-14 10:41:45 C 23 13 12.372 -08 12 53.78 V T08
2025-09-14 10:46:22 C 23 13 12.038 -08 13 14.23 V T08
2025-09-14 10:55:37 C 23 13 11.374 -08 13 55.06 V T08
2025-09-14 11:47:44 C 23 13 07.596 -08 17 45.13 V T08
2025-09-14 23:25:47 B 23 12 20.99 -09 09 41.2 X L76
2025-09-14 23:27:48 B 23 12 20.84 -09 09 50.3 X L76
2025-09-14 23:29:49 B 23 12 20.69 -09 09 59.4 X L76
2025-09-14 23:31:50 B 23 12 20.56 -09 10 08.3 X L76
2025-09-14 23:33:51 B 23 12 20.41 -09 10 17.3 X L76
2025-09-14 23:35:52 B 23 12 20.26 -09 10 26.4 X L76
2025-09-14 23:37:53 B 23 12 20.11 -09 10 35.5 X L76
2025-09-14 23:39:54 B 23 12 19.97 -09 10 44.3 X L76
2025-09-14 23:41:55 B 23 12 19.83 -09 10 53.3 X L76