Encke (2P)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2022-10-03 (JD 2459855.5)
Eccentricity (e)0.8477003353 ± 2.19e-07
Semi-major axis (a)2.2196888070 AU ± 1.36e-07
Inclination (i)11.40704099° ± 2.08e-05
Long. of Asc. Node (Ω)334.18510998° ± 5.54e-05
Arg. of Perihelion (ω)187.14215822° ± 5.56e-05
Mean Anomaly (M)245.50091097° ± 1.14e-05
Mean Motion (n)0.2980340852°/day ± 2.73e-08
Perihelion dist (q)0.33805786 AU ± 4.86e-07
Aphelion dist (Q)4.10131975 AU ± 5.46e-07
Orbital Period3.30709248 yr ± 3.03e-07
Physical Parameters
Diameter4.800 km
Geometric Albedo0.046
Rotation Period11.083 h
Orbit Solution
SourceJPL
Solution Date2026-08-13 12:41:21
RMS Residual0.448″
Uncertainty1
Orbit TypeEncke-type Comet
MOID0.166917 AU
Observations Used645
Oppositions—
Arc Total2018-2026
First Observation Used—
Last Observation Used2026-08-11
Observations (6393)
Date Type RA Dec Mag Band Observatory
2014-06-26 13:59:58 C 22 42 04.899 -12 39 05.69 – L F51
2014-06-28 06:09:28 C 22 41 08.16 -12 44 32.2 – q W96
2014-06-28 06:28:02 C 22 41 07.68 -12 44 34.6 – q W96
2014-06-28 12:17:41 C 22 40 59.096 -12 45 26.82 – L F51
2014-06-28 12:35:09 C 22 40 58.645 -12 45 29.30 – L F51
2014-06-28 12:52:31 C 22 40 58.199 -12 45 31.79 – L F51
2014-06-28 13:09:52 C 22 40 57.748 -12 45 34.32 – L F51
2014-07-08 11:42:06 C 22 33 41.863 -13 26 11.29 – L F51
2014-07-08 11:59:28 C 22 33 41.236 -13 26 14.64 – L F51
2014-07-08 12:16:50 C 22 33 40.591 -13 26 18.16 – L F51
2014-07-08 12:34:05 C 22 33 39.947 -13 26 21.53 – L F51
2014-07-24 01:06:15 C 22 17 24.79 -14 50 18.6 – q 958
2014-07-24 01:28:55 C 22 17 23.72 -14 50 23.0 – q 958
2014-07-25 07:33:20 C 22 15 51.93 -14 57 50.6 – R G45
2014-07-25 07:52:07 C 22 15 50.95 -14 57 54.9 – R G45
2014-07-25 08:10:45 C 22 15 49.98 -14 57 59.3 – R G45
2014-07-25 08:29:02 C 22 15 48.98 -14 58 04.7 – R G45
2014-07-25 08:29:19 C 22 15 48.99 -14 58 04.5 – R G45
2014-07-25 08:55:38 C 22 15 47.64 -14 58 11.5 – R G45
2014-07-25 12:32:22 C 22 15 36.459 -14 59 04.26 – L F51
2014-07-25 12:49:48 C 22 15 35.540 -14 59 08.58 – L F51
2014-07-25 13:07:14 C 22 15 34.621 -14 59 12.92 – L F51
2014-07-27 03:33:44 C 22 13 34.58 -15 08 50.0 – c J04
2014-07-27 03:50:34 C 22 13 33.69 -15 08 54.5 – c J04
2014-07-27 04:07:24 C 22 13 32.75 -15 08 58.6 – c J04
2014-07-27 04:24:14 C 22 13 31.86 -15 09 02.6 – c J04
2014-07-28 22:33:51 C 22 11 17.63 -15 19 40.2 – q A77
2014-07-28 22:43:15 C 22 11 17.11 -15 19 42.3 – q A77
2014-07-29 07:46:50 C 22 10 47.64 -15 21 56.3 – q W96
2014-07-29 08:26:44 C 22 10 45.41 -15 22 06.1 – q W96
2014-07-29 12:08:58 C 22 10 33.660 -15 23 04.68 – L F51
2014-07-29 12:25:28 C 22 10 32.751 -15 23 08.87 – L F51
2014-07-29 12:41:57 C 22 10 31.842 -15 23 13.00 – L F51
2014-07-30 12:25:30 C 22 09 14.651 -15 29 12.36 – L F51
2014-07-30 12:41:44 C 22 09 13.747 -15 29 16.45 – L F51
2014-07-30 13:14:04 C 22 09 11.946 -15 29 24.62 – L F51
2014-07-30 13:57:35 C 22 09 09.76 -15 29 32.1 – v Q62
2014-07-30 14:00:52 C 22 09 09.58 -15 29 33.2 – v Q62
2014-07-31 00:12:54 C 22 08 36.09 -15 32 12.3 – q A77
2014-07-31 00:29:01 C 22 08 35.19 -15 32 16.4 – q A77
2014-08-03 11:18:04 C 22 03 59.514 -15 53 05.84 – L F51
2014-08-03 11:56:49 C 22 03 57.292 -15 53 15.53 – L F51
2014-08-03 12:16:11 C 22 03 56.186 -15 53 20.37 – L F51
2014-08-05 11:08:57 C 22 01 17.488 -16 05 01.79 – L F51
2014-08-05 11:28:33 C 22 01 16.352 -16 05 06.60 – L F51
2014-08-05 11:48:01 C 22 01 15.229 -16 05 11.42 – L F51
2014-08-06 11:23:21 C 21 59 54.823 -16 11 01.31 – L F51
2014-08-06 11:40:28 C 21 59 53.814 -16 11 05.57 – L F51
2014-08-06 12:14:45 C 21 59 51.833 -16 11 14.02 – L F51
2014-08-14 10:54:43 C 21 48 56.769 -16 56 28.73 – L F51
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1980-11-05 14:44:00 -280334.5 2.5 Hz 2380 -1 -1
1980-11-05.613889 -2803345 10 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)