| 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) |
| 2026-05-12 00:00 |
01:55:13.89 |
+09:54:06.3 |
HIP 8872 |
15.54 |
| 2026-05-12 12:00 |
01:55:51.86 |
+09:57:46.1 |
HIP 8872 |
24.61 |
| 2026-05-13 00:00 |
01:56:29.85 |
+10:01:25.6 |
HIP 9142 |
25.76 |
| 2026-05-13 12:00 |
01:57:07.88 |
+10:05:04.8 |
HIP 9142 |
16.62 |
| 2026-05-14 00:00 |
01:57:45.92 |
+10:08:43.7 |
HIP 9142 |
9.54 |
| 2026-05-14 12:00 |
01:58:23.99 |
+10:12:22.3 |
HIP 9142 |
10.38 |
| 2026-05-15 00:00 |
01:59:02.08 |
+10:16:00.6 |
HIP 9142 |
18.07 |
| 2026-05-15 12:00 |
01:59:40.20 |
+10:19:38.5 |
HIP 9369 |
20.95 |
| 2026-05-16 00:00 |
02:00:18.34 |
+10:23:16.2 |
HIP 9369 |
14.57 |
| 2026-05-16 12:00 |
02:00:56.50 |
+10:26:53.6 |
HIP 9369 |
13.70 |
| 2026-05-17 00:00 |
02:01:34.69 |
+10:30:30.6 |
HIP 9369 |
19.13 |
| 2026-05-17 12:00 |
02:02:12.90 |
+10:34:07.3 |
HIP 9369 |
27.32 |
| 2026-05-18 00:00 |
02:02:51.12 |
+10:37:43.7 |
HIP 9569 |
23.45 |
| 2026-05-18 12:00 |
02:03:29.37 |
+10:41:19.7 |
HIP 9569 |
21.28 |
| 2026-05-19 00:00 |
02:04:07.64 |
+10:44:55.4 |
HIP 9569 |
23.63 |
| 2026-05-19 12:00 |
02:04:45.92 |
+10:48:30.7 |
HIP 9569 |
29.44 |
| 2026-05-20 00:00 |
02:05:24.23 |
+10:52:05.7 |
HIP 9842 |
29.87 |
| 2026-05-20 12:00 |
02:06:02.56 |
+10:55:40.3 |
HIP 9842 |
28.51 |
| 2026-05-21 00:00 |
02:06:40.90 |
+10:59:14.6 |
HIP 9964 |
24.00 |
| 2026-05-21 12:00 |
02:07:19.26 |
+11:02:48.5 |
HIP 9952 |
14.59 |
| 2026-05-22 00:00 |
02:07:57.64 |
+11:06:22.1 |
HIP 9952 |
5.58 |
| 2026-05-22 12:00 |
02:08:36.04 |
+11:09:55.3 |
HIP 9952 |
7.22 |
| 2026-05-23 00:00 |
02:09:14.45 |
+11:13:28.1 |
HIP 9952 |
16.61 |
| 2026-05-23 12:00 |
02:09:52.89 |
+11:17:00.5 |
HIP 9952 |
26.50 |
| 2026-05-24 00:00 |
02:10:31.33 |
+11:20:32.6 |
HIP 9952 |
36.49 |
| 2026-05-24 12:00 |
02:11:09.80 |
+11:24:04.3 |
HIP 10310 |
36.84 |
| 2026-05-25 00:00 |
02:11:48.28 |
+11:27:35.6 |
HIP 10310 |
28.30 |
| 2026-05-25 12:00 |
02:12:26.78 |
+11:31:06.6 |
HIP 10310 |
21.15 |
| 2026-05-26 00:00 |
02:13:05.29 |
+11:34:37.1 |
HIP 10310 |
17.21 |
| 2026-05-26 12:00 |
02:13:43.82 |
+11:38:07.3 |
HIP 10376 |
18.47 |
| 2026-05-27 00:00 |
02:14:22.36 |
+11:41:37.1 |
HIP 10376 |
18.10 |
| 2026-05-27 12:00 |
02:15:00.92 |
+11:45:06.5 |
HIP 10376 |
22.74 |
| 2026-05-28 00:00 |
02:15:39.49 |
+11:48:35.5 |
HIP 10549 |
27.21 |
| 2026-05-28 12:00 |
02:16:18.08 |
+11:52:04.1 |
HIP 10472 |
29.36 |
| 2026-05-29 00:00 |
02:16:56.68 |
+11:55:32.2 |
HIP 10599 |
28.19 |
| 2026-05-29 12:00 |
02:17:35.30 |
+11:59:00.0 |
HIP 10796 |
23.89 |
| 2026-05-30 00:00 |
02:18:13.93 |
+12:02:27.4 |
HIP 10796 |
14.20 |
| 2026-05-30 12:00 |
02:18:52.57 |
+12:05:54.4 |
HIP 10796 |
5.93 |
| 2026-05-31 00:00 |
02:19:31.23 |
+12:09:21.0 |
HIP 10796 |
8.42 |
| 2026-05-31 12:00 |
02:20:09.90 |
+12:12:47.2 |
HIP 10796 |
17.58 |
| 2026-06-01 00:00 |
02:20:48.58 |
+12:16:12.9 |
HIP 11019 |
15.63 |
| 2026-06-01 12:00 |
02:21:27.28 |
+12:19:38.2 |
HIP 11019 |
7.39 |
| 2026-06-02 00:00 |
02:22:05.99 |
+12:23:03.1 |
HIP 11019 |
8.18 |