| 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 |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
03:34:49.85 |
+17:54:23.0 |
HIP 16641 |
10.80 |
| 2026-07-29 12:00 |
03:35:26.21 |
+17:56:42.2 |
HIP 16802 |
14.41 |
| 2026-07-30 00:00 |
03:36:02.50 |
+17:59:00.6 |
HIP 16802 |
10.82 |
| 2026-07-30 12:00 |
03:36:38.73 |
+18:01:18.4 |
HIP 16802 |
13.63 |
| 2026-07-31 00:00 |
03:37:14.89 |
+18:03:35.5 |
HIP 16802 |
20.32 |
| 2026-07-31 12:00 |
03:37:50.98 |
+18:05:52.0 |
HIP 16944 |
23.17 |
| 2026-08-01 00:00 |
03:38:26.99 |
+18:08:07.8 |
HIP 16944 |
21.49 |
| 2026-08-01 12:00 |
03:39:02.94 |
+18:10:23.0 |
HIP 17076 |
14.66 |
| 2026-08-02 00:00 |
03:39:38.81 |
+18:12:37.5 |
HIP 17076 |
10.57 |
| 2026-08-02 12:00 |
03:40:14.61 |
+18:14:51.3 |
HIP 17174 |
10.82 |
| 2026-08-03 00:00 |
03:40:50.33 |
+18:17:04.4 |
HIP 17174 |
11.25 |
| 2026-08-03 12:00 |
03:41:25.98 |
+18:19:16.9 |
HIP 17282 |
10.99 |
| 2026-08-04 00:00 |
03:42:01.54 |
+18:21:28.7 |
HIP 17282 |
9.14 |
| 2026-08-04 12:00 |
03:42:37.03 |
+18:23:39.9 |
HIP 17282 |
14.06 |
| 2026-08-05 00:00 |
03:43:12.43 |
+18:25:50.4 |
HIP 17282 |
21.50 |
| 2026-08-05 12:00 |
03:43:47.75 |
+18:28:00.2 |
HIP 17421 |
25.86 |
| 2026-08-06 00:00 |
03:44:22.99 |
+18:30:09.3 |
HIP 17586 |
23.55 |
| 2026-08-06 12:00 |
03:44:58.14 |
+18:32:17.8 |
HIP 17586 |
15.00 |
| 2026-08-07 00:00 |
03:45:33.21 |
+18:34:25.6 |
HIP 17586 |
6.60 |
| 2026-08-07 12:00 |
03:46:08.18 |
+18:36:32.7 |
HIP 17586 |
3.06 |
| 2026-08-08 00:00 |
03:46:43.06 |
+18:38:39.2 |
HIP 17586 |
11.00 |
| 2026-08-08 12:00 |
03:47:17.85 |
+18:40:44.9 |
HIP 17740 |
9.33 |
| 2026-08-09 00:00 |
03:47:52.55 |
+18:42:50.0 |
HIP 17740 |
3.21 |
| 2026-08-09 12:00 |
03:48:27.15 |
+18:44:54.5 |
HIP 17740 |
8.77 |
| 2026-08-10 00:00 |
03:49:01.65 |
+18:46:58.2 |
HIP 17740 |
16.89 |
| 2026-08-10 12:00 |
03:49:36.05 |
+18:49:01.3 |
HIP 17740 |
25.19 |
| 2026-08-11 00:00 |
03:50:10.36 |
+18:51:03.7 |
HIP 17961 |
24.40 |
| 2026-08-11 12:00 |
03:50:44.55 |
+18:53:05.4 |
HIP 18110 |
22.34 |
| 2026-08-12 00:00 |
03:51:18.65 |
+18:55:06.4 |
HIP 18110 |
14.19 |
| 2026-08-12 12:00 |
03:51:52.64 |
+18:57:06.8 |
HIP 18110 |
6.48 |
| 2026-08-13 00:00 |
03:52:26.52 |
+18:59:06.5 |
HIP 18110 |
4.46 |
| 2026-08-13 12:00 |
03:53:00.29 |
+19:01:05.5 |
HIP 18110 |
11.55 |
| 2026-08-14 00:00 |
03:53:33.94 |
+19:03:03.9 |
HIP 18110 |
19.52 |
| 2026-08-14 12:00 |
03:54:07.49 |
+19:05:01.6 |
HIP 18347 |
24.90 |
| 2026-08-15 00:00 |
03:54:40.92 |
+19:06:58.6 |
HIP 18347 |
18.50 |
| 2026-08-15 12:00 |
03:55:14.24 |
+19:08:55.0 |
HIP 18409 |
13.76 |
| 2026-08-16 00:00 |
03:55:47.43 |
+19:10:50.7 |
HIP 18409 |
5.82 |
| 2026-08-16 12:00 |
03:56:20.51 |
+19:12:45.7 |
HIP 18409 |
2.90 |
| 2026-08-17 00:00 |
03:56:53.47 |
+19:14:40.1 |
HIP 18409 |
10.57 |
| 2026-08-17 12:00 |
03:57:26.31 |
+19:16:33.8 |
HIP 18409 |
18.50 |
| 2026-08-18 00:00 |
03:57:59.02 |
+19:18:26.8 |
HIP 18409 |
26.42 |
| 2026-08-18 12:00 |
03:58:31.61 |
+19:20:19.2 |
HIP 18409 |
34.32 |
| 2026-08-19 00:00 |
03:59:04.06 |
+19:22:10.9 |
HIP 18784 |
36.67 |