| Parameter |
Value |
| Designation |
377P/Scotti |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-07-10T01:54:37.517760Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:13:02Z |
| Obs used |
192 |
| NEO |
- |
| M1 |
12.300 |
| K1 |
6.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-03-09T02:38:12.768000Z |
| Discovery magnitude (MPC) |
20.30 G |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-07-04.0000000 |
| e |
0.25147638 |
| q (au) |
5.036392 |
| a (au) |
6.728435 |
| i (deg) |
9.016997 |
| Ω (om, deg) |
226.030194 |
| ω (w, deg) |
354.469351 |
| M (ma, deg) |
235.870097 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.055 + 2.748\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.055 |
| n |
2.748 |
| gf |
0.931 |
| gb |
-0.938 |
| k |
1.000 |
| δ90 |
9.697 |
| 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 |
00:38:47.12 |
+10:50:09.4 |
HIP 3121 |
17.31 |
| 2026-07-29 12:00 |
00:38:45.59 |
+10:50:13.7 |
HIP 3121 |
17.64 |
| 2026-07-30 00:00 |
00:38:43.95 |
+10:50:17.2 |
HIP 3121 |
18.00 |
| 2026-07-30 12:00 |
00:38:42.20 |
+10:50:20.0 |
HIP 3121 |
18.37 |
| 2026-07-31 00:00 |
00:38:40.33 |
+10:50:21.9 |
HIP 3121 |
18.75 |
| 2026-07-31 12:00 |
00:38:38.35 |
+10:50:23.1 |
HIP 3121 |
19.16 |
| 2026-08-01 00:00 |
00:38:36.25 |
+10:50:23.4 |
HIP 3121 |
19.59 |
| 2026-08-01 12:00 |
00:38:34.05 |
+10:50:23.0 |
HIP 3121 |
20.03 |
| 2026-08-02 00:00 |
00:38:31.72 |
+10:50:21.8 |
HIP 3121 |
20.50 |
| 2026-08-02 12:00 |
00:38:29.29 |
+10:50:19.8 |
HIP 3121 |
20.98 |
| 2026-08-03 00:00 |
00:38:26.74 |
+10:50:17.0 |
HIP 3121 |
21.49 |
| 2026-08-03 12:00 |
00:38:24.08 |
+10:50:13.4 |
HIP 3121 |
22.03 |
| 2026-08-04 00:00 |
00:38:21.31 |
+10:50:09.0 |
HIP 3121 |
22.58 |
| 2026-08-04 12:00 |
00:38:18.42 |
+10:50:03.8 |
HIP 3121 |
23.17 |
| 2026-08-05 00:00 |
00:38:15.42 |
+10:49:57.8 |
HIP 3121 |
23.78 |
| 2026-08-05 12:00 |
00:38:12.31 |
+10:49:51.0 |
HIP 3121 |
24.41 |
| 2026-08-06 00:00 |
00:38:09.09 |
+10:49:43.4 |
HIP 3121 |
25.07 |
| 2026-08-06 12:00 |
00:38:05.76 |
+10:49:35.0 |
HIP 3121 |
25.76 |
| 2026-08-07 00:00 |
00:38:02.31 |
+10:49:25.7 |
HIP 3121 |
26.48 |
| 2026-08-07 12:00 |
00:37:58.76 |
+10:49:15.7 |
HIP 3121 |
27.23 |
| 2026-08-08 00:00 |
00:37:55.09 |
+10:49:04.9 |
HIP 3121 |
28.00 |
| 2026-08-08 12:00 |
00:37:51.31 |
+10:48:53.2 |
HIP 3121 |
28.81 |
| 2026-08-09 00:00 |
00:37:47.42 |
+10:48:40.8 |
HIP 3121 |
29.64 |
| 2026-08-09 12:00 |
00:37:43.43 |
+10:48:27.5 |
HIP 3121 |
30.51 |
| 2026-08-10 00:00 |
00:37:39.32 |
+10:48:13.4 |
HIP 3121 |
31.41 |
| 2026-08-10 12:00 |
00:37:35.10 |
+10:47:58.6 |
HIP 3121 |
32.33 |
| 2026-08-11 00:00 |
00:37:30.78 |
+10:47:42.9 |
HIP 3121 |
33.29 |
| 2026-08-11 12:00 |
00:37:26.34 |
+10:47:26.4 |
HIP 3121 |
34.28 |
| 2026-08-12 00:00 |
00:37:21.80 |
+10:47:09.1 |
HIP 3121 |
35.30 |
| 2026-08-12 12:00 |
00:37:17.15 |
+10:46:50.9 |
HIP 3121 |
36.35 |
| 2026-08-13 00:00 |
00:37:12.40 |
+10:46:32.0 |
HIP 3121 |
37.43 |
| 2026-08-13 12:00 |
00:37:07.54 |
+10:46:12.3 |
HIP 3121 |
38.54 |
| 2026-08-14 00:00 |
00:37:02.57 |
+10:45:51.8 |
HIP 3121 |
39.68 |
| 2026-08-14 12:00 |
00:36:57.50 |
+10:45:30.4 |
HIP 2724 |
40.35 |
| 2026-08-15 00:00 |
00:36:52.32 |
+10:45:08.3 |
HIP 2724 |
39.52 |
| 2026-08-15 12:00 |
00:36:47.04 |
+10:44:45.3 |
HIP 2724 |
38.70 |
| 2026-08-16 00:00 |
00:36:41.66 |
+10:44:21.6 |
HIP 2724 |
37.90 |
| 2026-08-16 12:00 |
00:36:36.18 |
+10:43:57.1 |
HIP 2724 |
37.12 |
| 2026-08-17 00:00 |
00:36:30.59 |
+10:43:31.7 |
HIP 2724 |
36.38 |
| 2026-08-17 12:00 |
00:36:24.90 |
+10:43:05.6 |
HIP 2724 |
35.66 |
| 2026-08-18 00:00 |
00:36:19.12 |
+10:42:38.7 |
HIP 2724 |
34.99 |
| 2026-08-18 12:00 |
00:36:13.23 |
+10:42:11.0 |
HIP 2724 |
34.36 |
| 2026-08-19 00:00 |
00:36:07.24 |
+10:41:42.5 |
HIP 2724 |
33.78 |