Spahr (171P)

⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2018-04-24 (JD 2458232.5)
Eccentricity (e)0.5019570017 ± 1.25e-07
Semi-major axis (a)3.5582083748 AU ± 6.48e-08
Inclination (i)21.93292046° ± 1.57e-05
Long. of Asc. Node (Ω)101.69970629° ± 2.31e-05
Arg. of Perihelion (ω)347.16355376° ± 8.33e-05
Mean Anomaly (M)321.12416402° ± 2.51e-05
Mean Motion (n)0.1468470444°/day ± 4.01e-09
Perihelion dist (q)1.77214077 AU ± 4.47e-07
Aphelion dist (Q)5.34427598 AU ± 4.57e-07
Orbital Period6.71192456 yr ± 1.83e-07
NGA Modelg(r)
A1-1.59975403e-09 ± 1.57e-10 AU/d²
A2-1.79469031e-09 ± 1.14e-12 AU/d²
Orbit Solution
SourceIAA
Solution Date2026-05-30
RMS Residual0.842″
Uncertainty0
Orbit TypeMBA
MOID0.793125 AU
Observations Used904
Oppositions24
Arc Total1998-2026
First Observation Used1998-11-13
Last Observation Used2025-09-30
Observations (960)
Date Type RA Dec Mag Band Observatory
2019-02-23 18:29:47 C 05 00 15.07 +26 45 14.8 – Q B96
2019-02-23 18:40:02 C 05 00 15.92 +26 45 25.0 – Q B96
2019-02-23 20:00:04 C 05 00 21.33 +26 46 13.6 – q A71
2019-02-23 20:05:59 C 05 00 21.73 +26 46 16.8 – q C23
2019-02-23 20:06:38 C 05 00 21.71 +26 46 18.4 – q A71
2019-02-23 20:12:14 C 05 00 22.54 +26 46 29.1 – q C23
2019-02-23 20:13:12 C 05 00 22.16 +26 46 22.3 – q A71
2019-02-23 20:16:22 C 05 00 22.52 +26 46 28.2 – q C23
2019-02-24 18:34:20 C 05 01 55.93 +27 00 42.1 – V K87
2019-02-24 18:45:19 C 05 01 56.78 +27 00 49.2 – V K87
2019-02-24 18:56:18 C 05 01 57.36 +27 00 55.8 – V K87
2019-02-26 18:38:52 C 05 05 22.09 +27 30 45.1 – Q B96
2019-02-26 18:45:20 C 05 05 22.62 +27 30 48.4 – Q B96
2019-02-26 18:51:50 C 05 05 22.90 +27 30 52.4 – Q B96
2019-03-01 12:44:09 C 05 10 15.45 +28 10 12.7 – q Q11
2019-03-01 12:59:35 C 05 10 16.61 +28 10 21.3 – q Q11
2019-03-08 19:09:12 C 05 24 03.70 +29 44 27.0 – q 160
2019-03-08 19:13:17 C 05 24 04.04 +29 44 29.1 – q 160
2019-03-08 19:17:22 C 05 24 04.37 +29 44 31.5 – q 160
2019-03-23 19:11:15 C 05 55 57.70 +32 14 06.0 – q 160
2019-03-23 19:15:47 C 05 55 58.01 +32 14 07.1 – q 160
2019-03-23 19:20:18 C 05 55 58.49 +32 14 10.1 – q 160
2019-04-10 00:31:56 C 06 36 26.68 +33 54 02.8 – q I81
2019-04-10 00:38:28 C 06 36 27.32 +33 54 03.7 – q I81
2025-09-20 08:10:36 C 07 52 41.84 +15 53 48.4 – X W62
2025-09-20 08:19:39 C 07 52 42.79 +15 53 49.1 – X W62
2025-09-20 08:27:57 C 07 52 43.66 +15 53 49.6 – X W62
2025-09-21 03:01:07 C 07 54 40.63 +15 55 11.0 – q 215
2025-09-21 03:06:43 C 07 54 41.24 +15 55 11.4 – q 215
2025-09-21 03:12:20 C 07 54 41.81 +15 55 11.8 – q 215
2025-09-22 14:40:53 C 07 58 25.050 +15 57 44.36 – X F52
2025-09-22 14:47:47 C 07 58 25.771 +15 57 44.85 – X F52
2025-09-22 14:54:34 C 07 58 26.472 +15 57 45.37 – X F52
2025-09-22 15:01:31 C 07 58 27.193 +15 57 45.90 – X F52
2025-09-22 21:27:19 C 07 59 07.609 +15 58 11.05 – W O18
2025-09-22 21:33:37 C 07 59 08.244 +15 58 11.62 – W O18
2025-09-22 21:39:51 C 07 59 08.901 +15 58 12.06 – W O18
2025-09-22 21:43:04 C 07 59 09.239 +15 58 12.45 – W O18
2025-09-22 21:49:22 C 07 59 09.898 +15 58 12.63 – W O18
2025-09-23 21:24:22 C 08 01 37.902 +15 59 49.07 – W O18
2025-09-23 21:30:45 C 08 01 38.559 +15 59 49.16 – W O18
2025-09-23 21:37:03 C 08 01 39.198 +15 59 49.66 – W O18
2025-09-30 10:57:24 C 08 17 59.107 +16 09 43.99 – V 703
2025-09-30 11:00:42 C 08 17 59.518 +16 09 45.58 – V 703
2025-09-30 11:03:59 C 08 17 59.924 +16 09 45.65 – V 703
2025-11-15 12:04:52 C 10 03 01.804 +17 49 31.58 – V G96
2025-11-15 12:11:46 C 10 03 02.369 +17 49 33.53 – V G96
2025-11-15 12:18:39 C 10 03 02.941 +17 49 33.96 – V G96
2025-11-15 12:25:31 C 10 03 03.510 +17 49 35.80 – V G96
2025-11-18 22:18:39 B 10 09 50.823 +18 05 06.84 – X N56