| 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) |
| 2026-06-01 00:00 |
10:26:03.34 |
+06:55:57.2 |
HIP 51058 |
4.74 |
| 2026-06-01 12:00 |
10:26:08.82 |
+06:55:50.3 |
HIP 51058 |
5.26 |
| 2026-06-02 00:00 |
10:26:14.41 |
+06:55:42.7 |
HIP 51058 |
6.06 |
| 2026-06-02 12:00 |
10:26:20.11 |
+06:55:34.5 |
HIP 51058 |
7.06 |
| 2026-06-03 00:00 |
10:26:25.92 |
+06:55:25.4 |
HIP 51058 |
8.21 |
| 2026-06-03 12:00 |
10:26:31.84 |
+06:55:15.7 |
HIP 51058 |
9.46 |
| 2026-06-04 00:00 |
10:26:37.87 |
+06:55:05.3 |
HIP 51058 |
10.79 |
| 2026-06-04 12:00 |
10:26:44.01 |
+06:54:54.2 |
HIP 51058 |
12.18 |
| 2026-06-05 00:00 |
10:26:50.25 |
+06:54:42.4 |
HIP 51058 |
13.63 |
| 2026-06-05 12:00 |
10:26:56.60 |
+06:54:29.8 |
HIP 51058 |
15.12 |
| 2026-06-06 00:00 |
10:27:03.05 |
+06:54:16.6 |
HIP 51058 |
16.66 |
| 2026-06-06 12:00 |
10:27:09.62 |
+06:54:02.7 |
HIP 51254 |
18.10 |
| 2026-06-07 00:00 |
10:27:16.29 |
+06:53:48.1 |
HIP 51254 |
16.60 |
| 2026-06-07 12:00 |
10:27:23.06 |
+06:53:32.8 |
HIP 51254 |
15.11 |
| 2026-06-08 00:00 |
10:27:29.94 |
+06:53:16.8 |
HIP 51254 |
13.64 |
| 2026-06-08 12:00 |
10:27:36.92 |
+06:53:00.1 |
HIP 51254 |
12.21 |
| 2026-06-09 00:00 |
10:27:44.01 |
+06:52:42.7 |
HIP 51254 |
10.86 |
| 2026-06-09 12:00 |
10:27:51.20 |
+06:52:24.7 |
HIP 51254 |
9.62 |
| 2026-06-10 00:00 |
10:27:58.49 |
+06:52:05.9 |
HIP 51254 |
8.57 |
| 2026-06-10 12:00 |
10:28:05.89 |
+06:51:46.5 |
HIP 51254 |
7.80 |
| 2026-06-11 00:00 |
10:28:13.39 |
+06:51:26.4 |
HIP 51254 |
7.42 |
| 2026-06-11 12:00 |
10:28:20.98 |
+06:51:05.6 |
HIP 51254 |
7.51 |
| 2026-06-12 00:00 |
10:28:28.68 |
+06:50:44.2 |
HIP 51254 |
8.07 |
| 2026-06-12 12:00 |
10:28:36.49 |
+06:50:22.1 |
HIP 51254 |
9.03 |
| 2026-06-13 00:00 |
10:28:44.39 |
+06:49:59.3 |
HIP 51254 |
10.31 |
| 2026-06-13 12:00 |
10:28:52.39 |
+06:49:35.8 |
HIP 51254 |
11.80 |
| 2026-06-14 00:00 |
10:29:00.48 |
+06:49:11.7 |
HIP 51254 |
13.45 |
| 2026-06-14 12:00 |
10:29:08.68 |
+06:48:46.9 |
HIP 51254 |
15.21 |
| 2026-06-15 00:00 |
10:29:16.98 |
+06:48:21.4 |
HIP 51254 |
17.07 |
| 2026-06-15 12:00 |
10:29:25.37 |
+06:47:55.3 |
HIP 51254 |
19.00 |
| 2026-06-16 00:00 |
10:29:33.86 |
+06:47:28.5 |
HIP 51458 |
18.39 |
| 2026-06-16 12:00 |
10:29:42.44 |
+06:47:01.1 |
HIP 51458 |
16.37 |
| 2026-06-17 00:00 |
10:29:51.12 |
+06:46:33.0 |
HIP 51458 |
14.37 |
| 2026-06-17 12:00 |
10:29:59.89 |
+06:46:04.3 |
HIP 51458 |
12.41 |
| 2026-06-18 00:00 |
10:30:08.76 |
+06:45:34.9 |
HIP 51458 |
10.54 |
| 2026-06-18 12:00 |
10:30:17.72 |
+06:45:04.9 |
HIP 51458 |
8.82 |
| 2026-06-19 00:00 |
10:30:26.78 |
+06:44:34.3 |
HIP 51458 |
7.41 |
| 2026-06-19 12:00 |
10:30:35.92 |
+06:44:03.0 |
HIP 51458 |
6.50 |
| 2026-06-20 00:00 |
10:30:45.16 |
+06:43:31.1 |
HIP 51458 |
6.37 |
| 2026-06-20 12:00 |
10:30:54.49 |
+06:42:58.6 |
HIP 51505 |
6.60 |
| 2026-06-21 00:00 |
10:31:03.91 |
+06:42:25.5 |
HIP 51505 |
5.37 |
| 2026-06-21 12:00 |
10:31:13.41 |
+06:41:51.7 |
HIP 51505 |
5.07 |
| 2026-06-22 00:00 |
10:31:23.01 |
+06:41:17.3 |
HIP 51522 |
5.32 |