82P/Gehrels 3
| Parameter |
Value |
| Designation |
82P/Gehrels 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-08-30T06:54:50.483520Z |
| Orbit solution date (soln_date, UTC) |
2021-03-19T14:50:48Z |
| Obs used |
143 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
18.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-07-29.0000000 |
| e |
0.12325421 |
| q (au) |
3.625705 |
| a (au) |
4.135412 |
| i (deg) |
1.126555 |
| Ω (om, deg) |
239.591461 |
| ω (w, deg) |
227.495662 |
| M (ma, deg) |
38.993681 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.339 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.339 |
| n |
2.000 |
| gf |
0.923 |
| gb |
-0.934 |
| k |
1.000 |
| δ90 |
7.611 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
03:02:10.92 |
+17:06:37.6 |
HIP 14183 |
29.14 |
| 2026-02-03 12:00 |
03:02:25.55 |
+17:07:33.5 |
HIP 14183 |
27.21 |
| 2026-02-04 00:00 |
03:02:40.42 |
+17:08:30.2 |
HIP 14183 |
25.62 |
| 2026-02-04 12:00 |
03:02:55.51 |
+17:09:27.9 |
HIP 14183 |
24.47 |
| 2026-02-05 00:00 |
03:03:10.84 |
+17:10:26.5 |
HIP 14183 |
23.85 |
| 2026-02-05 12:00 |
03:03:26.39 |
+17:11:25.9 |
HIP 14183 |
23.83 |
| 2026-02-06 00:00 |
03:03:42.18 |
+17:12:26.2 |
HIP 14183 |
24.43 |
| 2026-02-06 12:00 |
03:03:58.19 |
+17:13:27.4 |
HIP 14183 |
25.63 |
| 2026-02-07 00:00 |
03:04:14.43 |
+17:14:29.5 |
HIP 14183 |
27.39 |
| 2026-02-07 12:00 |
03:04:30.89 |
+17:15:32.4 |
HIP 14183 |
29.62 |
| 2026-02-08 00:00 |
03:04:47.58 |
+17:16:36.1 |
HIP 14183 |
32.25 |
| 2026-02-08 12:00 |
03:05:04.49 |
+17:17:40.7 |
HIP 14183 |
35.21 |
| 2026-02-09 00:00 |
03:05:21.62 |
+17:18:46.1 |
HIP 14183 |
38.43 |
| 2026-02-09 12:00 |
03:05:38.98 |
+17:19:52.3 |
HIP 14569 |
39.66 |
| 2026-02-10 00:00 |
03:05:56.55 |
+17:20:59.3 |
HIP 14569 |
36.56 |
| 2026-02-10 12:00 |
03:06:14.34 |
+17:22:07.2 |
HIP 14569 |
33.70 |
| 2026-02-11 00:00 |
03:06:32.35 |
+17:23:15.8 |
HIP 14569 |
31.18 |
| 2026-02-11 12:00 |
03:06:50.58 |
+17:24:25.2 |
HIP 14569 |
29.10 |
| 2026-02-12 00:00 |
03:07:09.02 |
+17:25:35.4 |
HIP 14514 |
27.50 |
| 2026-02-12 12:00 |
03:07:27.68 |
+17:26:46.3 |
HIP 14514 |
26.03 |
| 2026-02-13 00:00 |
03:07:46.55 |
+17:27:58.0 |
HIP 14514 |
25.32 |
| 2026-02-13 12:00 |
03:08:05.63 |
+17:29:10.5 |
HIP 14683 |
25.25 |
| 2026-02-14 00:00 |
03:08:24.92 |
+17:30:23.7 |
HIP 14683 |
20.58 |
| 2026-02-14 12:00 |
03:08:44.42 |
+17:31:37.6 |
HIP 14683 |
15.90 |
| 2026-02-15 00:00 |
03:09:04.13 |
+17:32:52.2 |
HIP 14683 |
11.30 |
| 2026-02-15 12:00 |
03:09:24.05 |
+17:34:07.5 |
HIP 14683 |
7.00 |
| 2026-02-16 00:00 |
03:09:44.17 |
+17:35:23.6 |
HIP 14683 |
4.29 |
| 2026-02-16 12:00 |
03:10:04.50 |
+17:36:40.3 |
HIP 14683 |
6.13 |
| 2026-02-17 00:00 |
03:10:25.04 |
+17:37:57.7 |
HIP 14683 |
10.39 |
| 2026-02-17 12:00 |
03:10:45.77 |
+17:39:15.7 |
HIP 14683 |
15.19 |
| 2026-02-18 00:00 |
03:11:06.71 |
+17:40:34.5 |
HIP 14683 |
20.19 |
| 2026-02-18 12:00 |
03:11:27.85 |
+17:41:53.8 |
HIP 14683 |
25.31 |
| 2026-02-19 00:00 |
03:11:49.19 |
+17:43:13.9 |
HIP 14901 |
25.98 |
| 2026-02-19 12:00 |
03:12:10.72 |
+17:44:34.5 |
HIP 14901 |
26.54 |
| 2026-02-20 00:00 |
03:12:32.45 |
+17:45:55.8 |
HIP 15052 |
21.84 |
| 2026-02-20 12:00 |
03:12:54.38 |
+17:47:17.6 |
HIP 15052 |
16.48 |
| 2026-02-21 00:00 |
03:13:16.50 |
+17:48:40.1 |
HIP 15052 |
11.09 |
| 2026-02-21 12:00 |
03:13:38.81 |
+17:50:03.2 |
HIP 15052 |
5.77 |
| 2026-02-22 00:00 |
03:14:01.31 |
+17:51:26.8 |
HIP 15052 |
1.97 |
| 2026-02-22 12:00 |
03:14:24.01 |
+17:52:51.0 |
HIP 15052 |
6.01 |
| 2026-02-23 00:00 |
03:14:46.89 |
+17:54:15.7 |
HIP 15098 |
7.46 |
| 2026-02-23 12:00 |
03:15:09.95 |
+17:55:41.0 |
HIP 15098 |
8.29 |
| 2026-02-24 00:00 |
03:15:33.21 |
+17:57:06.8 |
HIP 15098 |
12.12 |