| 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) |
| 2026-07-29 00:00 |
10:46:37.49 |
+05:34:01.3 |
HIP 52627 |
17.42 |
| 2026-07-29 12:00 |
10:46:52.06 |
+05:32:49.6 |
HIP 52810 |
16.91 |
| 2026-07-30 00:00 |
10:47:06.66 |
+05:31:37.6 |
HIP 52810 |
14.97 |
| 2026-07-30 12:00 |
10:47:21.31 |
+05:30:25.2 |
HIP 52810 |
13.84 |
| 2026-07-31 00:00 |
10:47:36.00 |
+05:29:12.4 |
HIP 52810 |
13.73 |
| 2026-07-31 12:00 |
10:47:50.74 |
+05:27:59.3 |
HIP 52810 |
14.68 |
| 2026-08-01 00:00 |
10:48:05.51 |
+05:26:45.8 |
HIP 52810 |
16.51 |
| 2026-08-01 12:00 |
10:48:20.33 |
+05:25:31.9 |
HIP 52810 |
18.97 |
| 2026-08-02 00:00 |
10:48:35.19 |
+05:24:17.7 |
HIP 52810 |
21.87 |
| 2026-08-02 12:00 |
10:48:50.09 |
+05:23:03.2 |
HIP 52810 |
25.04 |
| 2026-08-03 00:00 |
10:49:05.02 |
+05:21:48.3 |
HIP 52810 |
28.42 |
| 2026-08-03 12:00 |
10:49:20.00 |
+05:20:33.0 |
HIP 53021 |
27.39 |
| 2026-08-04 00:00 |
10:49:35.02 |
+05:19:17.5 |
HIP 53021 |
25.09 |
| 2026-08-04 12:00 |
10:49:50.07 |
+05:18:01.5 |
HIP 53021 |
23.23 |
| 2026-08-05 00:00 |
10:50:05.17 |
+05:16:45.3 |
HIP 53032 |
20.59 |
| 2026-08-05 12:00 |
10:50:20.30 |
+05:15:28.7 |
HIP 53032 |
17.15 |
| 2026-08-06 00:00 |
10:50:35.46 |
+05:14:11.8 |
HIP 53032 |
13.99 |
| 2026-08-06 12:00 |
10:50:50.67 |
+05:12:54.5 |
HIP 53032 |
11.36 |
| 2026-08-07 00:00 |
10:51:05.91 |
+05:11:36.9 |
HIP 53032 |
9.71 |
| 2026-08-07 12:00 |
10:51:21.18 |
+05:10:19.1 |
HIP 53032 |
9.58 |
| 2026-08-08 00:00 |
10:51:36.49 |
+05:09:00.8 |
HIP 53032 |
11.02 |
| 2026-08-08 12:00 |
10:51:51.83 |
+05:07:42.3 |
HIP 53165 |
13.01 |
| 2026-08-09 00:00 |
10:52:07.21 |
+05:06:23.5 |
HIP 53165 |
9.20 |
| 2026-08-09 12:00 |
10:52:22.62 |
+05:05:04.4 |
HIP 53165 |
5.72 |
| 2026-08-10 00:00 |
10:52:38.07 |
+05:03:44.9 |
HIP 53165 |
3.70 |
| 2026-08-10 12:00 |
10:52:53.54 |
+05:02:25.2 |
HIP 53212 |
5.18 |
| 2026-08-11 00:00 |
10:53:09.05 |
+05:01:05.1 |
HIP 53212 |
3.76 |
| 2026-08-11 12:00 |
10:53:24.58 |
+04:59:44.8 |
HIP 53212 |
5.91 |
| 2026-08-12 00:00 |
10:53:40.15 |
+04:58:24.2 |
HIP 53212 |
9.45 |
| 2026-08-12 12:00 |
10:53:55.75 |
+04:57:03.3 |
HIP 53212 |
13.33 |
| 2026-08-13 00:00 |
10:54:11.37 |
+04:55:42.1 |
HIP 53212 |
17.32 |
| 2026-08-13 12:00 |
10:54:27.03 |
+04:54:20.7 |
HIP 53212 |
21.37 |
| 2026-08-14 00:00 |
10:54:42.71 |
+04:52:59.0 |
HIP 53212 |
25.45 |
| 2026-08-14 12:00 |
10:54:58.42 |
+04:51:37.0 |
HIP 53212 |
29.56 |
| 2026-08-15 00:00 |
10:55:14.15 |
+04:50:14.7 |
HIP 53485 |
32.41 |
| 2026-08-15 12:00 |
10:55:29.91 |
+04:48:52.2 |
HIP 53485 |
31.45 |
| 2026-08-16 00:00 |
10:55:45.70 |
+04:47:29.4 |
HIP 53485 |
31.03 |
| 2026-08-16 12:00 |
10:56:01.51 |
+04:46:06.4 |
HIP 53485 |
31.17 |
| 2026-08-17 00:00 |
10:56:17.35 |
+04:44:43.2 |
HIP 53485 |
31.87 |
| 2026-08-17 12:00 |
10:56:33.20 |
+04:43:19.6 |
HIP 53485 |
33.08 |
| 2026-08-18 00:00 |
10:56:49.08 |
+04:41:55.9 |
HIP 53485 |
34.77 |
| 2026-08-18 12:00 |
10:57:04.99 |
+04:40:31.9 |
HIP 53648 |
35.63 |
| 2026-08-19 00:00 |
10:57:20.91 |
+04:39:07.7 |
HIP 53648 |
32.15 |