| Parameter |
Value |
| Designation |
416P/Scotti |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-02-07T12:56:21.298560Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:34Z |
| Obs used |
138 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-12-07.0000000 |
| e |
0.45570137 |
| q (au) |
2.180164 |
| a (au) |
4.005456 |
| i (deg) |
3.365426 |
| Ω (om, deg) |
355.801740 |
| ω (w, deg) |
134.673507 |
| M (ma, deg) |
126.940382 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.729 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.729 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.558 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
23:11:24.49 |
-06:26:55.0 |
HIP 114445 |
31.35 |
| 2026-07-29 12:00 |
23:11:14.53 |
-06:27:54.8 |
HIP 114445 |
31.51 |
| 2026-07-30 00:00 |
23:11:04.40 |
-06:28:55.4 |
HIP 114445 |
31.91 |
| 2026-07-30 12:00 |
23:10:54.11 |
-06:29:57.0 |
HIP 114445 |
32.53 |
| 2026-07-31 00:00 |
23:10:43.67 |
-06:30:59.5 |
HIP 114445 |
33.39 |
| 2026-07-31 12:00 |
23:10:33.07 |
-06:32:02.9 |
HIP 114445 |
34.47 |
| 2026-08-01 00:00 |
23:10:22.31 |
-06:33:07.2 |
HIP 114370 |
33.33 |
| 2026-08-01 12:00 |
23:10:11.39 |
-06:34:12.4 |
HIP 114370 |
31.69 |
| 2026-08-02 00:00 |
23:10:00.32 |
-06:35:18.5 |
HIP 114370 |
30.23 |
| 2026-08-02 12:00 |
23:09:49.10 |
-06:36:25.5 |
HIP 114370 |
28.98 |
| 2026-08-03 00:00 |
23:09:37.72 |
-06:37:33.3 |
HIP 114370 |
27.99 |
| 2026-08-03 12:00 |
23:09:26.20 |
-06:38:42.0 |
HIP 114370 |
27.30 |
| 2026-08-04 00:00 |
23:09:14.52 |
-06:39:51.5 |
HIP 114370 |
26.94 |
| 2026-08-04 12:00 |
23:09:02.69 |
-06:41:01.9 |
HIP 114370 |
26.94 |
| 2026-08-05 00:00 |
23:08:50.72 |
-06:42:13.2 |
HIP 114370 |
27.32 |
| 2026-08-05 12:00 |
23:08:38.60 |
-06:43:25.2 |
HIP 114370 |
28.08 |
| 2026-08-06 00:00 |
23:08:26.33 |
-06:44:38.1 |
HIP 114370 |
29.19 |
| 2026-08-06 12:00 |
23:08:13.92 |
-06:45:51.8 |
HIP 114257 |
30.24 |
| 2026-08-07 00:00 |
23:08:01.36 |
-06:47:06.3 |
HIP 114257 |
29.41 |
| 2026-08-07 12:00 |
23:07:48.67 |
-06:48:21.6 |
HIP 114257 |
28.94 |
| 2026-08-08 00:00 |
23:07:35.83 |
-06:49:37.7 |
HIP 114257 |
28.86 |
| 2026-08-08 12:00 |
23:07:22.86 |
-06:50:54.5 |
HIP 114257 |
29.20 |
| 2026-08-09 00:00 |
23:07:09.75 |
-06:52:12.1 |
HIP 114007 |
29.75 |
| 2026-08-09 12:00 |
23:06:56.50 |
-06:53:30.5 |
HIP 114007 |
27.40 |
| 2026-08-10 00:00 |
23:06:43.12 |
-06:54:49.5 |
HIP 114007 |
25.30 |
| 2026-08-10 12:00 |
23:06:29.60 |
-06:56:09.3 |
HIP 114007 |
23.54 |
| 2026-08-11 00:00 |
23:06:15.96 |
-06:57:29.8 |
HIP 114007 |
22.22 |
| 2026-08-11 12:00 |
23:06:02.19 |
-06:58:51.0 |
HIP 114007 |
21.44 |
| 2026-08-12 00:00 |
23:05:48.29 |
-07:00:12.9 |
HIP 114007 |
21.28 |
| 2026-08-12 12:00 |
23:05:34.26 |
-07:01:35.5 |
HIP 114007 |
21.77 |
| 2026-08-13 00:00 |
23:05:20.12 |
-07:02:58.7 |
HIP 114007 |
22.87 |
| 2026-08-13 12:00 |
23:05:05.85 |
-07:04:22.6 |
HIP 114007 |
24.53 |
| 2026-08-14 00:00 |
23:04:51.46 |
-07:05:47.1 |
HIP 113936 |
25.42 |
| 2026-08-14 12:00 |
23:04:36.96 |
-07:07:12.2 |
HIP 113936 |
26.06 |
| 2026-08-15 00:00 |
23:04:22.34 |
-07:08:37.9 |
HIP 113936 |
27.26 |
| 2026-08-15 12:00 |
23:04:07.61 |
-07:10:04.2 |
HIP 113936 |
28.94 |
| 2026-08-16 00:00 |
23:03:52.77 |
-07:11:31.0 |
HIP 113936 |
31.05 |
| 2026-08-16 12:00 |
23:03:37.82 |
-07:12:58.5 |
HIP 113709 |
31.73 |
| 2026-08-17 00:00 |
23:03:22.77 |
-07:14:26.4 |
HIP 113709 |
29.34 |
| 2026-08-17 12:00 |
23:03:07.61 |
-07:15:54.9 |
HIP 113709 |
27.31 |
| 2026-08-18 00:00 |
23:02:52.34 |
-07:17:23.9 |
HIP 113709 |
25.75 |
| 2026-08-18 12:00 |
23:02:36.98 |
-07:18:53.4 |
HIP 113674 |
23.72 |
| 2026-08-19 00:00 |
23:02:21.53 |
-07:20:23.3 |
HIP 113674 |
22.04 |