| 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 |
0.999 |
| 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) |
| 2026-05-12 00:00 |
11:43:52.73 |
+03:36:32.9 |
HIP 57302 |
36.28 |
| 2026-05-12 12:00 |
11:43:50.08 |
+03:36:34.2 |
HIP 57302 |
36.60 |
| 2026-05-13 00:00 |
11:43:47.61 |
+03:36:34.4 |
HIP 57028 |
36.46 |
| 2026-05-13 12:00 |
11:43:45.31 |
+03:36:33.4 |
HIP 57028 |
35.94 |
| 2026-05-14 00:00 |
11:43:43.19 |
+03:36:31.2 |
HIP 57028 |
35.47 |
| 2026-05-14 12:00 |
11:43:41.24 |
+03:36:27.9 |
HIP 57028 |
35.05 |
| 2026-05-15 00:00 |
11:43:39.47 |
+03:36:23.5 |
HIP 57028 |
34.68 |
| 2026-05-15 12:00 |
11:43:37.88 |
+03:36:17.9 |
HIP 57028 |
34.36 |
| 2026-05-16 00:00 |
11:43:36.46 |
+03:36:11.1 |
HIP 57028 |
34.09 |
| 2026-05-16 12:00 |
11:43:35.22 |
+03:36:03.2 |
HIP 57028 |
33.87 |
| 2026-05-17 00:00 |
11:43:34.16 |
+03:35:54.1 |
HIP 57028 |
33.70 |
| 2026-05-17 12:00 |
11:43:33.27 |
+03:35:43.9 |
HIP 57028 |
33.58 |
| 2026-05-18 00:00 |
11:43:32.57 |
+03:35:32.4 |
HIP 57028 |
33.51 |
| 2026-05-18 12:00 |
11:43:32.04 |
+03:35:19.9 |
HIP 57028 |
33.49 |
| 2026-05-19 00:00 |
11:43:31.69 |
+03:35:06.2 |
HIP 57028 |
33.52 |
| 2026-05-19 12:00 |
11:43:31.52 |
+03:34:51.3 |
HIP 57028 |
33.60 |
| 2026-05-20 00:00 |
11:43:31.52 |
+03:34:35.2 |
HIP 57028 |
33.73 |
| 2026-05-20 12:00 |
11:43:31.70 |
+03:34:18.0 |
HIP 57028 |
33.91 |
| 2026-05-21 00:00 |
11:43:32.07 |
+03:33:59.7 |
HIP 57028 |
34.14 |
| 2026-05-21 12:00 |
11:43:32.61 |
+03:33:40.2 |
HIP 57028 |
34.42 |
| 2026-05-22 00:00 |
11:43:33.32 |
+03:33:19.5 |
HIP 57028 |
34.75 |
| 2026-05-22 12:00 |
11:43:34.22 |
+03:32:57.8 |
HIP 57028 |
35.13 |
| 2026-05-23 00:00 |
11:43:35.29 |
+03:32:34.8 |
HIP 57302 |
35.20 |
| 2026-05-23 12:00 |
11:43:36.54 |
+03:32:10.7 |
HIP 57302 |
34.69 |
| 2026-05-24 00:00 |
11:43:37.96 |
+03:31:45.5 |
HIP 57302 |
34.14 |
| 2026-05-24 12:00 |
11:43:39.56 |
+03:31:19.2 |
HIP 57302 |
33.55 |
| 2026-05-25 00:00 |
11:43:41.34 |
+03:30:51.7 |
HIP 57302 |
32.92 |
| 2026-05-25 12:00 |
11:43:43.30 |
+03:30:23.1 |
HIP 57302 |
32.25 |
| 2026-05-26 00:00 |
11:43:45.43 |
+03:29:53.4 |
HIP 57302 |
31.54 |
| 2026-05-26 12:00 |
11:43:47.73 |
+03:29:22.5 |
HIP 57302 |
30.78 |
| 2026-05-27 00:00 |
11:43:50.21 |
+03:28:50.5 |
HIP 57302 |
29.99 |
| 2026-05-27 12:00 |
11:43:52.86 |
+03:28:17.5 |
HIP 57302 |
29.16 |
| 2026-05-28 00:00 |
11:43:55.69 |
+03:27:43.2 |
HIP 57302 |
28.29 |
| 2026-05-28 12:00 |
11:43:58.70 |
+03:27:07.9 |
HIP 57302 |
27.39 |
| 2026-05-29 00:00 |
11:44:01.87 |
+03:26:31.5 |
HIP 57302 |
26.45 |
| 2026-05-29 12:00 |
11:44:05.22 |
+03:25:54.0 |
HIP 57302 |
25.47 |
| 2026-05-30 00:00 |
11:44:08.74 |
+03:25:15.4 |
HIP 57302 |
24.46 |
| 2026-05-30 12:00 |
11:44:12.43 |
+03:24:35.7 |
HIP 57302 |
23.42 |
| 2026-05-31 00:00 |
11:44:16.30 |
+03:23:54.8 |
HIP 57302 |
22.36 |
| 2026-05-31 12:00 |
11:44:20.34 |
+03:23:12.9 |
HIP 57302 |
21.27 |
| 2026-06-01 00:00 |
11:44:24.54 |
+03:22:30.0 |
HIP 57302 |
20.16 |
| 2026-06-01 12:00 |
11:44:28.92 |
+03:21:45.9 |
HIP 57302 |
19.04 |
| 2026-06-02 00:00 |
11:44:33.47 |
+03:21:00.7 |
HIP 57302 |
17.92 |