| 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) |
| 2026-05-12 00:00 |
18:55:18.10 |
-30:32:45.7 |
HIP 92735 |
20.40 |
| 2026-05-12 12:00 |
18:55:13.31 |
-30:35:02.9 |
HIP 92735 |
20.43 |
| 2026-05-13 00:00 |
18:55:08.18 |
-30:37:20.6 |
HIP 92735 |
20.71 |
| 2026-05-13 12:00 |
18:55:02.72 |
-30:39:38.6 |
HIP 92735 |
21.25 |
| 2026-05-14 00:00 |
18:54:56.92 |
-30:41:57.0 |
HIP 92735 |
22.03 |
| 2026-05-14 12:00 |
18:54:50.79 |
-30:44:15.7 |
HIP 92735 |
23.06 |
| 2026-05-15 00:00 |
18:54:44.32 |
-30:46:34.8 |
HIP 92976 |
23.89 |
| 2026-05-15 12:00 |
18:54:37.52 |
-30:48:54.2 |
HIP 92748 |
24.36 |
| 2026-05-16 00:00 |
18:54:30.39 |
-30:51:13.9 |
HIP 92748 |
21.67 |
| 2026-05-16 12:00 |
18:54:22.93 |
-30:53:33.9 |
HIP 92748 |
18.98 |
| 2026-05-17 00:00 |
18:54:15.13 |
-30:55:54.2 |
HIP 92748 |
16.33 |
| 2026-05-17 12:00 |
18:54:07.01 |
-30:58:14.7 |
HIP 92748 |
13.75 |
| 2026-05-18 00:00 |
18:53:58.55 |
-31:00:35.5 |
HIP 92748 |
11.34 |
| 2026-05-18 12:00 |
18:53:49.77 |
-31:02:56.5 |
HIP 92748 |
9.26 |
| 2026-05-19 00:00 |
18:53:40.67 |
-31:05:17.6 |
HIP 92748 |
7.85 |
| 2026-05-19 12:00 |
18:53:31.24 |
-31:07:39.0 |
HIP 92748 |
7.56 |
| 2026-05-20 00:00 |
18:53:21.48 |
-31:10:00.5 |
HIP 92698 |
7.57 |
| 2026-05-20 12:00 |
18:53:11.41 |
-31:12:22.2 |
HIP 92698 |
5.24 |
| 2026-05-21 00:00 |
18:53:01.01 |
-31:14:44.0 |
HIP 92698 |
4.28 |
| 2026-05-21 12:00 |
18:52:50.30 |
-31:17:05.9 |
HIP 92698 |
5.57 |
| 2026-05-22 00:00 |
18:52:39.27 |
-31:19:27.9 |
HIP 92698 |
8.15 |
| 2026-05-22 12:00 |
18:52:27.93 |
-31:21:49.9 |
HIP 92698 |
11.20 |
| 2026-05-23 00:00 |
18:52:16.27 |
-31:24:12.0 |
HIP 92698 |
14.47 |
| 2026-05-23 12:00 |
18:52:04.31 |
-31:26:34.1 |
HIP 92698 |
17.85 |
| 2026-05-24 00:00 |
18:51:52.03 |
-31:28:56.3 |
HIP 92698 |
21.32 |
| 2026-05-24 12:00 |
18:51:39.45 |
-31:31:18.4 |
HIP 92397 |
24.54 |
| 2026-05-25 00:00 |
18:51:26.56 |
-31:33:40.4 |
HIP 92397 |
21.80 |
| 2026-05-25 12:00 |
18:51:13.38 |
-31:36:02.4 |
HIP 92397 |
19.29 |
| 2026-05-26 00:00 |
18:50:59.89 |
-31:38:24.3 |
HIP 92397 |
17.14 |
| 2026-05-26 12:00 |
18:50:46.10 |
-31:40:46.1 |
HIP 92397 |
15.55 |
| 2026-05-27 00:00 |
18:50:32.02 |
-31:43:07.8 |
HIP 92397 |
14.73 |
| 2026-05-27 12:00 |
18:50:17.64 |
-31:45:29.4 |
HIP 92397 |
14.84 |
| 2026-05-28 00:00 |
18:50:02.97 |
-31:47:50.7 |
HIP 92397 |
15.90 |
| 2026-05-28 12:00 |
18:49:48.02 |
-31:50:11.9 |
HIP 92397 |
17.77 |
| 2026-05-29 00:00 |
18:49:32.77 |
-31:52:32.9 |
HIP 92280 |
14.93 |
| 2026-05-29 12:00 |
18:49:17.25 |
-31:54:53.6 |
HIP 92280 |
11.99 |
| 2026-05-30 00:00 |
18:49:01.44 |
-31:57:14.1 |
HIP 92280 |
9.83 |
| 2026-05-30 12:00 |
18:48:45.35 |
-31:59:34.3 |
HIP 92280 |
9.07 |
| 2026-05-31 00:00 |
18:48:28.99 |
-32:01:54.2 |
HIP 92280 |
10.10 |
| 2026-05-31 12:00 |
18:48:12.36 |
-32:04:13.7 |
HIP 92238 |
7.02 |
| 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 |