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
1887-09-21 02:59:55 M 10 41 23.01 +29 00 34.3 q 516
1887-09-21 03:02:45 N 10 41 23.26 +29 00 21.0 q 475
1887-09-21 03:12:25 M 10 41 25.52 +29 00 25.3 q 603
1887-09-21 03:29:17 M 10 41 29.11 +29 00 23.6 q 516
1887-09-21 03:30:01 M 10 41 29.11 +29 00 23.7 q 516
1887-09-21 03:30:06 N 10 41 28.95 +29 00 21.7 q 035
1887-09-21 03:47:22 M 10 41 32.66 +29 00 16.0 q 014
1887-09-21 03:56:31 N 10 41 34.26 +29 00 15.7 q 526
1887-09-21 04:02:15 M 10 41 35.77 +29 00 15.0 q 516
1887-09-21 18:18:27 N 10 44 31.00 +28 55 58.4 q 084
1887-09-22 01:55:56 M 10 46 05.31 +28 53 38.2 q 058
1887-09-22 03:23:05 M 10 46 22.80 +28 53 12.0 q 603
1887-09-22 03:39:10 M 10 46 26.61 +28 53 08.0 q 539
1887-09-22 04:25:37 M 10 46 36.00 +28 52 54.2 q 999
1887-09-22 04:40:22 M 10 46 39.24 +28 52 46.4 q 008
1887-09-23 03:29:19 M 10 51 19.93 +28 45 16.1 q 035
1887-09-23 04:08:46 M 10 51 28.22 +28 45 06.2 q 008
1887-09-23 04:08:59 M 10 51 27.21 +28 44 51.8 q 014
1887-09-23 04:26:57 M 10 51 31.68 +28 44 56.6 q 008
1887-09-24 03:25:00 N 10 56 15.10 +28 36 52.4 q 035
1887-09-24 03:34:24 M 10 56 16.71 +28 36 49.0 q 603
1887-09-24 04:08:11 M 10 56 23.17 +28 36 37.0 q 014
1887-09-24 04:30:44 M 10 56 28.89 +28 36 31.6 q 999
1887-09-24 09:17:21 M 10 57 28.28 +28 34 38.6 q 296
1887-09-25 01:57:11 M 11 00 53.53 +28 28 22.4 q 089
1887-09-25 02:52:38 M 11 01 04.89 +28 28 01.8 q 516
1887-09-25 03:09:38 M 11 01 08.12 +28 27 52.6 q 035
1887-09-25 03:13:00 M 11 01 09.08 +28 27 45.3 q 603
1887-09-25 03:32:03 M 11 01 13.40 +28 27 39.7 q 533
1887-09-25 04:35:30 M 11 01 26.25 +28 27 22.6 q 999
1887-09-26 00:20:55 M 11 05 29.89 +28 19 20.5 q 084
1887-09-26 03:22:43 M 11 06 07.80 +28 18 05.5 q 539
1887-09-26 03:47:51 M 11 06 12.60 +28 17 52.4 q 539
1887-09-26 04:12:25 M 11 06 17.80 +28 17 48.2 q 999
1887-09-27 02:36:11 M 11 10 53.74 +28 08 13.8 q 534
1887-09-27 02:51:38 M 11 10 57.61 +28 08 12.1 q 539
1887-09-27 04:02:27 M 11 11 11.85 +28 07 32.5 q 014
1887-09-28 02:43:22 M 11 15 51.19 +27 57 21.9 q 058
1887-10-02 03:47:23 M 11 35 44.03 +27 07 40.1 q 189
1887-10-09 02:12:05 M 12 09 13.26 +25 22 10.0 q 058
1887-10-09 02:48:51 M 12 09 20.58 +25 21 44.5 q 058
1887-10-09 03:14:43 M 12 09 25.68 +25 21 23.3 q 058
1887-10-09 03:31:37 M 12 09 29.16 +25 21 15.9 q 058
1887-10-11 01:25:34 M 12 18 31.28 +24 47 57.6 q 084
1887-10-11 04:31:35 M 12 19 07.91 +24 45 47.1 q 582
1887-10-12 03:37:16 M 12 23 38.72 +24 28 24.7 q 539
1887-10-12 04:05:53 M 12 23 44.16 +24 27 56.8 q 539
1887-10-13 03:18:24 M 12 28 13.76 +24 10 04.9 q 058
1887-10-13 04:05:31 M 12 28 23.17 +24 09 37.2 q 582
1887-10-13 17:12:26 M 12 30 54.32 +23 59 20.3 q 084