Hartley-IRAS (161P)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2026-03-24 (JD 2461123.5)
Eccentricity (e)0.8361420000
Semi-major axis (a)7.7206910862 AU
Inclination (i)95.78950000°
Long. of Asc. Node (Ω)1.47730000°
Arg. of Perihelion (ω)47.07340000°
Mean Anomaly (M)0.00000000°
Mean Motion (n)—°/day
Perihelion dist (q)1.26509700 AU
Aphelion dist (Q)14.17628517 AU
Orbital Period21.45281385 yr
Physical Parameters
H (abs. magnitude)8.50
G (slope)6.00
Orbit Solution
SourceMPC
Solution Date—
RMS Residual—″
Uncertainty—
Orbit TypeP
MOID0.435913 AU
Observations Used—
Oppositions—
Arc Total—
First Observation Used—
Last Observation Used—
Observations (425)
Date Type RA Dec Mag Band Observatory
1984-03-22 19:27:34 A 20 34 11.53 +55 52 19.9 – – 168
1984-03-27 22:30:50 A 20 25 24.63 +60 06 43.5 – – 114
1984-03-27 22:48:04 A 20 25 23.03 +60 07 21.6 – – 114
1984-03-28 00:43:12 A 20 25 12.91 +60 11 16.8 – – 136
1984-03-28 09:39:16 A 20 24 25.40 +60 30 09.6 – A 801
1984-03-28 18:29:12 A 20 23 36.85 +60 48 48.9 – – 381
1984-03-29 16:34:34 A 20 21 27.04 +61 35 26.4 – – 168
1984-03-29 19:44:04 A 20 21 08.19 +61 42 12.2 – – 168
1984-03-29 19:59:05 A 20 21 06.83 +61 42 40.1 – – 168
1984-03-29 22:49:17 A 20 20 49.36 +61 48 47.2 – – 114
1984-03-30 12:43:43 A 20 19 21.66 +62 18 18.8 – – 657
1984-03-31 21:31:30 A 20 15 35.95 +63 28 09.6 – – 114
1984-04-01 18:02:26 A 20 12 59.84 +64 12 02.7 – – 136
1984-04-01 19:56:55 A 20 12 44.76 +64 16 00.7 – – 136
1984-04-01 23:30:02 A 20 12 16.66 +64 23 38.6 – – 136
1984-04-02 11:57:46 A 20 10 34.51 +64 50 14.4 – – 657
1984-04-02 21:45:18 A 20 09 11.39 +65 11 08.8 – – 114
1984-04-03 20:48:21 A 20 05 41.78 +66 00 19.9 – – 114
1984-04-05 03:00:26 A 20 00 39.81 +67 04 33.1 – – 491
1984-04-06 02:34:36 A 19 56 18.63 +67 54 25.0 – – 491
1984-04-06 19:48:34 A 19 52 52.15 +68 30 37.4 – – 168
1984-04-07 18:56:59 A 19 47 52.14 +69 18 52.5 – – 168
1984-04-08 11:22:01 A 19 44 00.59 +69 53 10.8 – – 675
1984-04-13 11:44:45 A 19 06 34.99 +73 48 58.1 – – 657
1984-04-17 17:31:05 A 18 17 07.33 +76 34 46.7 – – 168
1984-04-17 18:14:04 A 18 16 42.04 +76 35 49.9 – – 168
1984-04-18 17:47:35 A 18 02 14.57 +77 06 50.7 – – 168
1984-04-18 18:47:05 A 18 01 37.15 +77 08 05.7 – – 168
1984-04-18 19:09:04 A 18 01 21.68 +77 08 33.7 – – 168
1984-04-20 11:02:32 A 17 34 02.74 +77 52 23.9 – – 675
1984-04-20 20:37:59 A 17 26 59.86 +78 01 05.1 – – 102
1984-04-21 09:57:02 A 17 16 57.95 +78 12 03.4 – – 675
1984-04-22 17:38:35 A 16 51 56.50 +78 31 51.5 – – 168
1984-04-23 17:38:35 A 16 32 13.83 +78 40 49.4 – – 168
1984-04-25 10:53:57 A 15 57 41.83 +78 43 18.2 – – 657
1984-04-26 08:57:54 A 15 39 28.76 +78 38 02.6 – – 657
1984-04-27 07:27:29 A 15 21 20.83 +78 28 06.1 – – 657
1984-04-28 05:23:27 A 15 04 24.38 +78 14 09.2 – A 801
1984-05-03 20:21:34 A 13 40 59.66 +75 36 20.4 – – 168
1984-05-25 19:15:33 A 11 56 50.84 +59 38 56.8 – – 095
1984-05-28 19:21:28 A 11 53 04.73 +57 32 26.4 – – 095
1984-06-04 02:35:36 A 11 48 01.49 +53 20 38.1 – A 801
2004-11-03 16:21:25 C 02 41 26.38 -66 49 56.6 – r 413
2004-11-03 16:25:05 C 02 41 25.62 -66 49 56.5 – r 413
2004-11-03 16:28:45 C 02 41 24.89 -66 49 55.7 – r 413
2004-11-05 11:50:09 C 02 32 39.28 -66 44 15.6 – c 474
2004-11-05 11:53:50 C 02 32 38.51 -66 44 15.6 – c 474
2004-11-05 11:56:30 C 02 32 37.93 -66 44 15.1 – c 474
2004-11-05 12:01:49 C 02 32 36.82 -66 44 12.6 – c 474
2004-11-05 18:08:01 C 02 31 22.43 -66 43 09.8 – r 413