13P

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2020-12-10 (JD 2459193.5)
Eccentricity (e)0.9297090702 ± 3.19e-08
Semi-major axis (a)16.6888593039 AU ± 1.52e-07
Inclination (i)44.62417343° ± 1.37e-05
Long. of Asc. Node (Ω)85.87217989° ± 1.51e-05
Arg. of Perihelion (ω)64.51127082° ± 3.03e-05
Mean Anomaly (M)341.22493651° ± 4.64e-07
Mean Motion (n)0.0144565311°/day ± 1.97e-10
Perihelion dist (q)1.17307544 AU ± 5.33e-07
Aphelion dist (Q)32.20464317 AU ± 6.08e-07
Orbital Period68.17861620 yr ± 9.30e-07
Orbit Solution
SourceJPL
Solution Date2026-07-28 14:18:43
RMS Residual0.568″
Uncertainty0
Orbit TypeHalley-type Comet*
MOID0.470257 AU
Observations Used2605
Oppositions
Arc Total1887-2025
First Observation Used
Last Observation Used2025-07-31
Observations (2783)
Date Type RA Dec Mag Band Observatory
1887-08-27 09:02:36 M 08 46 43.18 +29 05 38.4 q 296
1887-08-28 01:35:33 M 08 49 38.36 +29 09 18.6 q 058
1887-08-28 02:21:49 M 08 49 47.10 +29 09 29.0 q 045
1887-08-28 02:58:40 M 08 49 53.74 +29 09 42.6 q 014
1887-08-28 03:02:57 M 08 49 53.73 +29 09 38.3 q 522
1887-08-28 03:08:15 M 08 49 55.64 +29 09 37.6 q 531
1887-08-28 08:56:55 M 08 50 57.97 +29 10 59.7 q 296
1887-08-28 09:56:42 M 08 51 08.07 +29 11 06.1 q 759
1887-08-29 01:41:51 M 08 53 55.63 +29 14 26.9 q 058
1887-08-29 02:33:50 M 08 54 05.47 +29 14 41.8 q 539
1887-08-29 02:34:45 M 08 54 04.65 +29 14 29.8 q 045
1887-08-29 02:52:43 M 08 54 08.52 +29 14 42.2 q 539
1887-08-29 08:46:07 M 08 55 11.65 +29 15 51.5 q 296
1887-08-29 10:11:05 M 08 55 27.25 +29 16 14.3 q 759
1887-08-30 01:43:26 M 08 58 14.20 +29 19 11.3 q 058
1887-08-30 03:00:54 M 08 58 28.97 +29 19 34.7 q 475
1887-08-30 03:06:17 M 08 58 29.35 +29 19 22.0 q 020
1887-08-30 03:20:03 M 08 58 31.78 +29 19 33.9 q 014
1887-08-30 03:26:52 M 08 58 33.15 +29 19 24.4 q 008
1887-08-30 03:28:32 M 08 58 33.10 +29 19 27.9 q 189
1887-08-30 03:43:08 M 08 58 35.88 +29 19 29.6 q 016
1887-08-30 03:53:42 M 08 58 38.11 +29 19 29.8 q 008
1887-08-30 08:44:11 M 08 59 30.03 +29 20 23.3 q 296
1887-08-30 09:32:24 N 08 59 38.26 +29 20 37.4 q 787
1887-08-31 02:40:55 M 09 02 45.52 +29 23 34.1 q 539
1887-08-31 02:49:45 M 09 02 46.94 +29 23 33.4 q 539
1887-08-31 02:52:26 M 09 02 47.84 +29 23 35.8 q 027
1887-08-31 02:59:56 M 09 02 48.62 +29 23 36.6 q 016
1887-08-31 03:03:26 M 09 02 49.42 +29 23 38.0 q 020
1887-08-31 03:22:45 M 09 02 52.17 +29 23 47.5 q 014
1887-08-31 08:39:58 M 09 03 50.68 +29 24 29.8 q 296
1887-08-31 09:09:42 M 09 03 56.74 +29 24 45.7 q 787
1887-08-31 09:25:00 M 09 03 58.83 +29 24 46.1 q 787
1887-09-01 03:07:37 M 09 07 12.86 +29 27 29.7 q 027
1887-09-01 03:42:41 M 09 07 19.63 +29 27 36.3 q 020
1887-09-01 03:43:17 M 09 07 18.81 +29 27 36.1 q 014
1887-09-01 03:54:34 M 09 07 21.80 +29 27 38.9 q 008
1887-09-01 04:10:34 M 09 07 24.81 +29 27 39.9 q 008
1887-09-02 03:33:04 M 09 11 43.08 +29 30 59.8 q 020
1887-09-02 03:35:45 M 09 11 43.40 +29 30 52.5 q 016
1887-09-03 03:20:57 M 09 16 08.52 +29 33 56.3 q 020
1887-09-03 04:03:18 M 09 16 15.24 +29 34 05.8 q 008
1887-09-04 02:53:38 M 09 20 32.77 +29 36 29.4 q 539
1887-09-06 03:28:47 M 09 29 45.35 +29 40 13.2 q 020
1887-09-07 02:30:57 N 09 34 10.29 +29 41 21.4 q 276
1887-09-07 02:43:40 M 09 34 12.82 +29 41 20.9 q 539
1887-09-07 03:14:03 M 09 34 17.81 +29 41 19.0 q 189
1887-09-07 03:34:50 M 09 34 22.52 +29 41 19.7 q 020
1887-09-09 01:09:16 M 09 43 11.47 +29 42 04.2 q 084
1887-09-09 03:35:18 M 09 43 39.94 +29 42 10.9 q 999