142P/Ge-Wang
| Parameter |
Value |
| Designation |
142P/Ge-Wang |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-05-30T02:38:24.838080Z |
| Orbit solution date (soln_date, UTC) |
2024-02-01T12:22:34Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
7.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-04-21.0000000 |
| e |
0.49914641 |
| q (au) |
2.487408 |
| a (au) |
4.966337 |
| i (deg) |
12.307409 |
| Ω (om, deg) |
176.518490 |
| ω (w, deg) |
175.630058 |
| M (ma, deg) |
29.021568 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.996 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.996 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
10:52:11.73 |
+02:52:50.9 |
HIP 53047 |
18.13 |
| 2026-02-03 12:00 |
10:52:01.29 |
+02:54:01.4 |
HIP 53047 |
16.84 |
| 2026-02-04 00:00 |
10:51:50.77 |
+02:55:12.6 |
HIP 53047 |
15.97 |
| 2026-02-04 12:00 |
10:51:40.17 |
+02:56:24.4 |
HIP 53047 |
15.58 |
| 2026-02-05 00:00 |
10:51:29.50 |
+02:57:36.8 |
HIP 53047 |
15.74 |
| 2026-02-05 12:00 |
10:51:18.74 |
+02:58:49.9 |
HIP 53047 |
16.43 |
| 2026-02-06 00:00 |
10:51:07.92 |
+03:00:03.6 |
HIP 53047 |
17.61 |
| 2026-02-06 12:00 |
10:50:57.01 |
+03:01:17.9 |
HIP 53047 |
19.19 |
| 2026-02-07 00:00 |
10:50:46.04 |
+03:02:32.8 |
HIP 53047 |
21.10 |
| 2026-02-07 12:00 |
10:50:34.99 |
+03:03:48.4 |
HIP 53047 |
23.26 |
| 2026-02-08 00:00 |
10:50:23.87 |
+03:05:04.5 |
HIP 53047 |
25.61 |
| 2026-02-08 12:00 |
10:50:12.69 |
+03:06:21.2 |
HIP 52919 |
23.53 |
| 2026-02-09 00:00 |
10:50:01.44 |
+03:07:38.5 |
HIP 52919 |
21.03 |
| 2026-02-09 12:00 |
10:49:50.12 |
+03:08:56.4 |
HIP 52919 |
18.70 |
| 2026-02-10 00:00 |
10:49:38.74 |
+03:10:14.8 |
HIP 52919 |
16.61 |
| 2026-02-10 12:00 |
10:49:27.29 |
+03:11:33.8 |
HIP 52919 |
14.88 |
| 2026-02-11 00:00 |
10:49:15.79 |
+03:12:53.3 |
HIP 52919 |
13.66 |
| 2026-02-11 12:00 |
10:49:04.22 |
+03:14:13.3 |
HIP 52919 |
13.10 |
| 2026-02-12 00:00 |
10:48:52.60 |
+03:15:33.9 |
HIP 52919 |
13.30 |
| 2026-02-12 12:00 |
10:48:40.92 |
+03:16:55.0 |
HIP 52919 |
14.24 |
| 2026-02-13 00:00 |
10:48:29.19 |
+03:18:16.5 |
HIP 52919 |
15.79 |
| 2026-02-13 12:00 |
10:48:17.40 |
+03:19:38.6 |
HIP 52919 |
17.81 |
| 2026-02-14 00:00 |
10:48:05.56 |
+03:21:01.2 |
HIP 52919 |
20.16 |
| 2026-02-14 12:00 |
10:47:53.68 |
+03:22:24.2 |
HIP 52919 |
22.75 |
| 2026-02-15 00:00 |
10:47:41.74 |
+03:23:47.7 |
HIP 52919 |
25.51 |
| 2026-02-15 12:00 |
10:47:29.76 |
+03:25:11.7 |
HIP 52919 |
28.39 |
| 2026-02-16 00:00 |
10:47:17.73 |
+03:26:36.1 |
HIP 52919 |
31.37 |
| 2026-02-16 12:00 |
10:47:05.66 |
+03:28:00.9 |
HIP 52591 |
32.13 |
| 2026-02-17 00:00 |
10:46:53.55 |
+03:29:26.2 |
HIP 52591 |
28.81 |
| 2026-02-17 12:00 |
10:46:41.40 |
+03:30:51.8 |
HIP 52591 |
25.47 |
| 2026-02-18 00:00 |
10:46:29.22 |
+03:32:17.9 |
HIP 52591 |
22.12 |
| 2026-02-18 12:00 |
10:46:17.00 |
+03:33:44.3 |
HIP 52591 |
18.77 |
| 2026-02-19 00:00 |
10:46:04.74 |
+03:35:11.1 |
HIP 52591 |
15.42 |
| 2026-02-19 12:00 |
10:45:52.45 |
+03:36:38.3 |
HIP 52591 |
12.07 |
| 2026-02-20 00:00 |
10:45:40.13 |
+03:38:05.9 |
HIP 52591 |
8.76 |
| 2026-02-20 12:00 |
10:45:27.78 |
+03:39:33.7 |
HIP 52591 |
5.54 |
| 2026-02-21 00:00 |
10:45:15.41 |
+03:41:01.9 |
HIP 52591 |
2.81 |
| 2026-02-21 12:00 |
10:45:03.01 |
+03:42:30.5 |
HIP 52591 |
2.91 |
| 2026-02-22 00:00 |
10:44:50.59 |
+03:43:59.3 |
HIP 52591 |
5.71 |
| 2026-02-22 12:00 |
10:44:38.15 |
+03:45:28.4 |
HIP 52591 |
8.97 |
| 2026-02-23 00:00 |
10:44:25.69 |
+03:46:57.8 |
HIP 52591 |
12.34 |
| 2026-02-23 12:00 |
10:44:13.21 |
+03:48:27.5 |
HIP 52542 |
14.48 |
| 2026-02-24 00:00 |
10:44:00.71 |
+03:49:57.4 |
HIP 52542 |
14.57 |