430P/Scotti
| Parameter |
Value |
| Designation |
430P/Scotti |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-06-14T14:13:40.632960Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:45:37Z |
| Obs used |
314 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
5.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-05-22.0000000 |
| e |
0.49966940 |
| q (au) |
1.554418 |
| a (au) |
3.106781 |
| i (deg) |
4.474476 |
| Ω (om, deg) |
54.691887 |
| ω (w, deg) |
94.571829 |
| M (ma, deg) |
224.184036 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.113 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.113 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.625 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
00:06:10.78 |
-02:10:50.5 |
HIP 515 |
17.63 |
| 2026-02-03 12:00 |
00:06:36.86 |
-02:07:35.7 |
HIP 515 |
15.54 |
| 2026-02-04 00:00 |
00:07:03.05 |
-02:04:20.4 |
HIP 515 |
16.70 |
| 2026-02-04 12:00 |
00:07:29.36 |
-02:01:04.4 |
HIP 515 |
20.59 |
| 2026-02-05 00:00 |
00:07:55.78 |
-01:57:47.8 |
HIP 700 |
19.54 |
| 2026-02-05 12:00 |
00:08:22.31 |
-01:54:30.6 |
HIP 700 |
19.55 |
| 2026-02-06 00:00 |
00:08:48.96 |
-01:51:12.9 |
HIP 700 |
22.19 |
| 2026-02-06 12:00 |
00:09:15.71 |
-01:47:54.5 |
HIP 700 |
26.72 |
| 2026-02-07 00:00 |
00:09:42.57 |
-01:44:35.6 |
HIP 892 |
27.20 |
| 2026-02-07 12:00 |
00:10:09.54 |
-01:41:16.1 |
HIP 892 |
26.05 |
| 2026-02-08 00:00 |
00:10:36.62 |
-01:37:56.0 |
HIP 892 |
27.02 |
| 2026-02-08 12:00 |
00:11:03.81 |
-01:34:35.4 |
HIP 925 |
28.03 |
| 2026-02-09 00:00 |
00:11:31.10 |
-01:31:14.2 |
HIP 925 |
23.84 |
| 2026-02-09 12:00 |
00:11:58.50 |
-01:27:52.4 |
HIP 1018 |
17.66 |
| 2026-02-10 00:00 |
00:12:26.00 |
-01:24:30.1 |
HIP 1018 |
11.44 |
| 2026-02-10 12:00 |
00:12:53.61 |
-01:21:07.2 |
HIP 1018 |
8.19 |
| 2026-02-11 00:00 |
00:13:21.32 |
-01:17:43.8 |
HIP 1018 |
11.04 |
| 2026-02-11 12:00 |
00:13:49.13 |
-01:14:19.9 |
HIP 1145 |
8.48 |
| 2026-02-12 00:00 |
00:14:17.05 |
-01:10:55.4 |
HIP 1145 |
0.86 |
| 2026-02-12 12:00 |
00:14:45.06 |
-01:07:30.4 |
HIP 1145 |
7.12 |
| 2026-02-13 00:00 |
00:15:13.18 |
-01:04:04.9 |
HIP 1145 |
14.92 |
| 2026-02-13 12:00 |
00:15:41.40 |
-01:00:38.9 |
HIP 1145 |
22.77 |
| 2026-02-14 00:00 |
00:16:09.72 |
-00:57:12.4 |
HIP 1145 |
30.64 |
| 2026-02-14 12:00 |
00:16:38.13 |
-00:53:45.3 |
HIP 1321 |
37.64 |
| 2026-02-15 00:00 |
00:17:06.65 |
-00:50:17.8 |
HIP 1321 |
41.84 |
| 2026-02-15 12:00 |
00:17:35.26 |
-00:46:49.8 |
HIP 1321 |
47.02 |
| 2026-02-16 00:00 |
00:18:03.97 |
-00:43:21.3 |
HIP 1663 |
42.39 |
| 2026-02-16 12:00 |
00:18:32.77 |
-00:39:52.3 |
HIP 1663 |
36.42 |
| 2026-02-17 00:00 |
00:19:01.67 |
-00:36:22.9 |
HIP 1663 |
31.34 |
| 2026-02-17 12:00 |
00:19:30.66 |
-00:32:53.0 |
HIP 1663 |
27.69 |
| 2026-02-18 00:00 |
00:19:59.75 |
-00:29:22.6 |
HIP 1663 |
26.08 |
| 2026-02-18 12:00 |
00:20:28.92 |
-00:25:51.8 |
HIP 1663 |
26.91 |
| 2026-02-19 00:00 |
00:20:58.19 |
-00:22:20.5 |
HIP 1663 |
30.00 |
| 2026-02-19 12:00 |
00:21:27.56 |
-00:18:48.8 |
HIP 1663 |
34.76 |
| 2026-02-20 00:00 |
00:21:57.01 |
-00:15:16.7 |
HIP 1874 |
31.05 |
| 2026-02-20 12:00 |
00:22:26.55 |
-00:11:44.1 |
HIP 1841 |
25.09 |
| 2026-02-21 00:00 |
00:22:56.18 |
-00:08:11.1 |
HIP 1841 |
18.81 |
| 2026-02-21 12:00 |
00:23:25.89 |
-00:04:37.7 |
HIP 1886 |
13.28 |
| 2026-02-22 00:00 |
00:23:55.70 |
-00:01:03.9 |
HIP 1886 |
8.54 |
| 2026-02-22 12:00 |
00:24:25.59 |
+00:02:30.3 |
HIP 1886 |
10.30 |
| 2026-02-23 00:00 |
00:24:55.56 |
+00:06:04.9 |
HIP 1886 |
16.65 |
| 2026-02-23 12:00 |
00:25:25.62 |
+00:09:39.9 |
HIP 2057 |
19.06 |
| 2026-02-24 00:00 |
00:25:55.77 |
+00:13:15.3 |
HIP 2057 |
13.14 |