| Parameter |
Value |
| Designation |
P/2010 H4 (Scotti) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-07-03T04:12:20.969280Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:57Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-03.0000000 |
| e |
0.27215157 |
| q (au) |
4.820821 |
| a (au) |
6.623386 |
| i (deg) |
2.314372 |
| Ω (om, deg) |
44.846591 |
| ω (w, deg) |
181.161990 |
| M (ma, deg) |
356.462799 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.615 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.615 |
| n |
6.000 |
| gf |
0.992 |
| gb |
-0.974 |
| 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) |
| 2026-09-20 00:00 |
12:51:27.17 |
-04:31:55.0 |
HIP 62729 |
9.38 |
| 2026-09-20 12:00 |
12:51:53.86 |
-04:34:49.9 |
HIP 62729 |
11.12 |
| 2026-09-21 00:00 |
12:52:20.58 |
-04:37:44.9 |
HIP 62729 |
16.29 |
| 2026-09-21 12:00 |
12:52:47.33 |
-04:40:40.0 |
HIP 62898 |
21.84 |
| 2026-09-22 00:00 |
12:53:14.12 |
-04:43:35.1 |
HIP 62898 |
16.91 |
| 2026-09-22 12:00 |
12:53:40.94 |
-04:46:30.3 |
HIP 62898 |
14.18 |
| 2026-09-23 00:00 |
12:54:07.79 |
-04:49:25.6 |
HIP 62898 |
14.92 |
| 2026-09-23 12:00 |
12:54:34.67 |
-04:52:21.0 |
HIP 62898 |
18.73 |
| 2026-09-24 00:00 |
12:55:01.58 |
-04:55:16.4 |
HIP 63139 |
18.62 |
| 2026-09-24 12:00 |
12:55:28.52 |
-04:58:11.8 |
HIP 63139 |
13.21 |
| 2026-09-25 00:00 |
12:55:55.50 |
-05:01:07.3 |
HIP 63139 |
10.48 |
| 2026-09-25 12:00 |
12:56:22.50 |
-05:04:02.9 |
HIP 63139 |
12.35 |
| 2026-09-26 00:00 |
12:56:49.53 |
-05:06:58.5 |
HIP 63139 |
17.40 |
| 2026-09-26 12:00 |
12:57:16.59 |
-05:09:54.1 |
HIP 63266 |
12.26 |
| 2026-09-27 00:00 |
12:57:43.68 |
-05:12:49.8 |
HIP 63266 |
6.08 |
| 2026-09-27 12:00 |
12:58:10.80 |
-05:15:45.5 |
HIP 63266 |
5.63 |
| 2026-09-28 00:00 |
12:58:37.94 |
-05:18:41.2 |
HIP 63266 |
11.62 |
| 2026-09-28 12:00 |
12:59:05.11 |
-05:21:37.0 |
HIP 63266 |
18.62 |
| 2026-09-29 00:00 |
12:59:32.31 |
-05:24:32.7 |
HIP 63523 |
22.00 |
| 2026-09-29 12:00 |
12:59:59.53 |
-05:27:28.5 |
HIP 63523 |
16.02 |
| 2026-09-30 00:00 |
13:00:26.78 |
-05:30:24.4 |
HIP 63523 |
11.75 |
| 2026-09-30 12:00 |
13:00:54.06 |
-05:33:20.2 |
HIP 63523 |
11.34 |
| 2026-10-01 00:00 |
13:01:21.36 |
-05:36:16.0 |
HIP 63523 |
15.12 |
| 2026-10-01 12:00 |
13:01:48.68 |
-05:39:11.8 |
HIP 63674 |
18.76 |
| 2026-10-02 00:00 |
13:02:16.03 |
-05:42:07.7 |
HIP 63674 |
11.36 |
| 2026-10-02 12:00 |
13:02:43.40 |
-05:45:03.5 |
HIP 63674 |
3.97 |
| 2026-10-03 00:00 |
13:03:10.80 |
-05:47:59.4 |
HIP 63674 |
3.54 |
| 2026-10-03 12:00 |
13:03:38.22 |
-05:50:55.2 |
HIP 63674 |
10.93 |
| 2026-10-04 00:00 |
13:04:05.66 |
-05:53:51.0 |
HIP 63674 |
18.35 |
| 2026-10-04 12:00 |
13:04:33.12 |
-05:56:46.8 |
HIP 63871 |
21.21 |
| 2026-10-05 00:00 |
13:05:00.61 |
-05:59:42.5 |
HIP 63871 |
15.09 |
| 2026-10-05 12:00 |
13:05:28.11 |
-06:02:38.2 |
HIP 63871 |
10.78 |
| 2026-10-06 00:00 |
13:05:55.64 |
-06:05:33.9 |
HIP 63871 |
10.75 |
| 2026-10-06 12:00 |
13:06:23.18 |
-06:08:29.6 |
HIP 64023 |
12.48 |
| 2026-10-07 00:00 |
13:06:50.75 |
-06:11:25.2 |
HIP 64023 |
8.27 |
| 2026-10-07 12:00 |
13:07:18.33 |
-06:14:20.8 |
HIP 64023 |
9.59 |
| 2026-10-08 00:00 |
13:07:45.93 |
-06:17:16.3 |
HIP 64023 |
15.05 |
| 2026-10-08 12:00 |
13:08:13.55 |
-06:20:11.8 |
HIP 64151 |
11.38 |
| 2026-10-09 00:00 |
13:08:41.18 |
-06:23:07.2 |
HIP 64151 |
4.28 |
| 2026-10-09 12:00 |
13:09:08.83 |
-06:26:02.5 |
HIP 64151 |
4.29 |
| 2026-10-10 00:00 |
13:09:36.50 |
-06:28:57.8 |
HIP 64151 |
11.40 |
| 2026-10-10 12:00 |
13:10:04.18 |
-06:31:52.9 |
HIP 64151 |
18.79 |
| 2026-10-11 00:00 |
13:10:31.88 |
-06:34:48.1 |
HIP 64151 |
26.23 |