| Parameter |
Value |
| Designation |
P/2010 H2 (Vales) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-03-09T08:27:45.460800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:42Z |
| Obs used |
1631 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-08.0000000 |
| e |
0.19290772 |
| q (au) |
3.107734 |
| a (au) |
3.850532 |
| i (deg) |
14.252912 |
| Ω (om, deg) |
64.308899 |
| ω (w, deg) |
130.123335 |
| M (ma, deg) |
7.780625 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.977 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.977 |
| n |
6.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
18:47:55.45 |
-32:06:32.9 |
HIP 92238 |
3.66 |
| 2026-06-01 12:00 |
18:47:38.28 |
-32:08:51.8 |
HIP 92238 |
3.79 |
| 2026-06-02 00:00 |
18:47:20.84 |
-32:11:10.2 |
HIP 92238 |
7.29 |
| 2026-06-02 12:00 |
18:47:03.14 |
-32:13:28.2 |
HIP 92238 |
11.45 |
| 2026-06-03 00:00 |
18:46:45.18 |
-32:15:45.8 |
HIP 92238 |
15.78 |
| 2026-06-03 12:00 |
18:46:26.97 |
-32:18:02.9 |
HIP 92238 |
20.20 |
| 2026-06-04 00:00 |
18:46:08.51 |
-32:20:19.6 |
HIP 92197 |
24.39 |
| 2026-06-04 12:00 |
18:45:49.79 |
-32:22:35.7 |
HIP 92197 |
25.62 |
| 2026-06-05 00:00 |
18:45:30.84 |
-32:24:51.2 |
HIP 91866 |
23.11 |
| 2026-06-05 12:00 |
18:45:11.64 |
-32:27:06.3 |
HIP 91866 |
18.75 |
| 2026-06-06 00:00 |
18:44:52.20 |
-32:29:20.7 |
HIP 91866 |
14.52 |
| 2026-06-06 12:00 |
18:44:32.53 |
-32:31:34.5 |
HIP 91866 |
10.61 |
| 2026-06-07 00:00 |
18:44:12.63 |
-32:33:47.7 |
HIP 91866 |
7.61 |
| 2026-06-07 12:00 |
18:43:52.51 |
-32:36:00.3 |
HIP 91866 |
6.94 |
| 2026-06-08 00:00 |
18:43:32.16 |
-32:38:12.1 |
HIP 91866 |
9.17 |
| 2026-06-08 12:00 |
18:43:11.59 |
-32:40:23.3 |
HIP 91791 |
5.02 |
| 2026-06-09 00:00 |
18:42:50.81 |
-32:42:33.8 |
HIP 91791 |
3.34 |
| 2026-06-09 12:00 |
18:42:29.82 |
-32:44:43.5 |
HIP 91791 |
6.74 |
| 2026-06-10 00:00 |
18:42:08.62 |
-32:46:52.4 |
HIP 91791 |
11.35 |
| 2026-06-10 12:00 |
18:41:47.23 |
-32:49:00.5 |
HIP 91791 |
16.20 |
| 2026-06-11 00:00 |
18:41:25.63 |
-32:51:07.8 |
HIP 91791 |
21.14 |
| 2026-06-11 12:00 |
18:41:03.85 |
-32:53:14.3 |
HIP 91488 |
20.66 |
| 2026-06-12 00:00 |
18:40:41.87 |
-32:55:19.9 |
HIP 91488 |
15.63 |
| 2026-06-12 12:00 |
18:40:19.72 |
-32:57:24.7 |
HIP 91488 |
10.61 |
| 2026-06-13 00:00 |
18:39:57.39 |
-32:59:28.5 |
HIP 91488 |
5.68 |
| 2026-06-13 12:00 |
18:39:34.88 |
-33:01:31.4 |
HIP 91488 |
2.07 |
| 2026-06-14 00:00 |
18:39:12.21 |
-33:03:33.4 |
HIP 91488 |
5.42 |
| 2026-06-14 12:00 |
18:38:49.38 |
-33:05:34.3 |
HIP 91488 |
10.40 |
| 2026-06-15 00:00 |
18:38:26.39 |
-33:07:34.3 |
HIP 91488 |
15.54 |
| 2026-06-15 12:00 |
18:38:03.26 |
-33:09:33.3 |
HIP 91488 |
20.74 |
| 2026-06-16 00:00 |
18:37:39.97 |
-33:11:31.2 |
HIP 91158 |
22.38 |
| 2026-06-16 12:00 |
18:37:16.55 |
-33:13:28.1 |
HIP 91158 |
17.70 |
| 2026-06-17 00:00 |
18:36:53.00 |
-33:15:23.9 |
HIP 91158 |
13.44 |
| 2026-06-17 12:00 |
18:36:29.32 |
-33:17:18.6 |
HIP 91158 |
10.18 |
| 2026-06-18 00:00 |
18:36:05.52 |
-33:19:12.2 |
HIP 91158 |
9.07 |
| 2026-06-18 12:00 |
18:35:41.60 |
-33:21:04.6 |
HIP 91158 |
10.84 |
| 2026-06-19 00:00 |
18:35:17.58 |
-33:22:55.9 |
HIP 91158 |
14.48 |
| 2026-06-19 12:00 |
18:34:53.45 |
-33:24:46.0 |
HIP 91158 |
18.94 |
| 2026-06-20 00:00 |
18:34:29.22 |
-33:26:35.0 |
HIP 90989 |
15.77 |
| 2026-06-20 12:00 |
18:34:04.90 |
-33:28:22.7 |
HIP 90989 |
11.05 |
| 2026-06-21 00:00 |
18:33:40.49 |
-33:30:09.2 |
HIP 90989 |
7.31 |
| 2026-06-21 12:00 |
18:33:16.01 |
-33:31:54.5 |
HIP 90989 |
6.57 |
| 2026-06-22 00:00 |
18:32:51.44 |
-33:33:38.6 |
HIP 90989 |
9.56 |