P/2015 C1 (TOTAS-Gibbs)
| Parameter |
Value |
| Designation |
P/2015 C1 (TOTAS-Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-05-01T06:59:29.762880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:06Z |
| Obs used |
290 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-03-12.0000000 |
| e |
0.56245006 |
| q (au) |
2.892675 |
| a (au) |
6.611073 |
| i (deg) |
13.877560 |
| Ω (om, deg) |
348.862081 |
| ω (w, deg) |
178.414934 |
| M (ma, deg) |
357.083989 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.583 + 4.475\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.583 |
| n |
4.475 |
| gf |
1.000 |
| gb |
-0.940 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
23:54:08.44 |
+03:11:41.6 |
HIP 117933 |
18.35 |
| 2026-02-03 12:00 |
23:54:17.94 |
+03:12:44.4 |
HIP 117933 |
15.87 |
| 2026-02-04 00:00 |
23:54:27.49 |
+03:13:47.6 |
HIP 117933 |
13.41 |
| 2026-02-04 12:00 |
23:54:37.10 |
+03:14:51.2 |
HIP 117933 |
11.01 |
| 2026-02-05 00:00 |
23:54:46.77 |
+03:15:55.2 |
HIP 117933 |
8.72 |
| 2026-02-05 12:00 |
23:54:56.48 |
+03:16:59.6 |
HIP 117933 |
6.69 |
| 2026-02-06 00:00 |
23:55:06.25 |
+03:18:04.5 |
HIP 117933 |
5.24 |
| 2026-02-06 12:00 |
23:55:16.08 |
+03:19:09.7 |
HIP 117933 |
4.94 |
| 2026-02-07 00:00 |
23:55:25.95 |
+03:20:15.3 |
HIP 117933 |
5.99 |
| 2026-02-07 12:00 |
23:55:35.88 |
+03:21:21.4 |
HIP 117933 |
7.88 |
| 2026-02-08 00:00 |
23:55:45.85 |
+03:22:27.8 |
HIP 117953 |
8.36 |
| 2026-02-08 12:00 |
23:55:55.88 |
+03:23:34.6 |
HIP 117953 |
8.77 |
| 2026-02-09 00:00 |
23:56:05.96 |
+03:24:41.9 |
HIP 117953 |
9.95 |
| 2026-02-09 12:00 |
23:56:16.09 |
+03:25:49.5 |
HIP 117953 |
11.69 |
| 2026-02-10 00:00 |
23:56:26.26 |
+03:26:57.5 |
HIP 117953 |
13.78 |
| 2026-02-10 12:00 |
23:56:36.49 |
+03:28:05.8 |
HIP 117953 |
16.09 |
| 2026-02-11 00:00 |
23:56:46.76 |
+03:29:14.6 |
HIP 118053 |
15.26 |
| 2026-02-11 12:00 |
23:56:57.08 |
+03:30:23.7 |
HIP 118053 |
14.38 |
| 2026-02-12 00:00 |
23:57:07.45 |
+03:31:33.2 |
HIP 118053 |
14.02 |
| 2026-02-12 12:00 |
23:57:17.86 |
+03:32:43.1 |
HIP 118053 |
14.23 |
| 2026-02-13 00:00 |
23:57:28.32 |
+03:33:53.3 |
HIP 118185 |
13.80 |
| 2026-02-13 12:00 |
23:57:38.82 |
+03:35:03.9 |
HIP 118185 |
11.20 |
| 2026-02-14 00:00 |
23:57:49.37 |
+03:36:14.9 |
HIP 118185 |
8.77 |
| 2026-02-14 12:00 |
23:57:59.96 |
+03:37:26.2 |
HIP 118185 |
6.71 |
| 2026-02-15 00:00 |
23:58:10.60 |
+03:38:37.8 |
HIP 118185 |
5.46 |
| 2026-02-15 12:00 |
23:58:21.28 |
+03:39:49.8 |
HIP 118185 |
5.62 |
| 2026-02-16 00:00 |
23:58:32.00 |
+03:41:02.2 |
HIP 118185 |
7.11 |
| 2026-02-16 12:00 |
23:58:42.76 |
+03:42:14.9 |
HIP 118185 |
9.33 |
| 2026-02-17 00:00 |
23:58:53.57 |
+03:43:27.9 |
HIP 118185 |
11.87 |
| 2026-02-17 12:00 |
23:59:04.41 |
+03:44:41.3 |
HIP 118185 |
14.59 |
| 2026-02-18 00:00 |
23:59:15.30 |
+03:45:55.0 |
HIP 6 |
16.37 |
| 2026-02-18 12:00 |
23:59:26.22 |
+03:47:09.1 |
HIP 6 |
13.54 |
| 2026-02-19 00:00 |
23:59:37.19 |
+03:48:23.4 |
HIP 6 |
10.79 |
| 2026-02-19 12:00 |
23:59:48.19 |
+03:49:38.1 |
HIP 6 |
8.21 |
| 2026-02-20 00:00 |
23:59:59.23 |
+03:50:53.1 |
HIP 6 |
6.04 |
| 2026-02-20 12:00 |
00:00:10.31 |
+03:52:08.4 |
HIP 6 |
4.88 |
| 2026-02-21 00:00 |
00:00:21.42 |
+03:53:24.0 |
HIP 6 |
5.44 |
| 2026-02-21 12:00 |
00:00:32.57 |
+03:54:39.9 |
HIP 6 |
7.35 |
| 2026-02-22 00:00 |
00:00:43.75 |
+03:55:56.1 |
HIP 6 |
9.86 |
| 2026-02-22 12:00 |
00:00:54.97 |
+03:57:12.6 |
HIP 6 |
12.63 |
| 2026-02-23 00:00 |
00:01:06.22 |
+03:58:29.4 |
HIP 6 |
15.52 |
| 2026-02-23 12:00 |
00:01:17.51 |
+03:59:46.5 |
HIP 6 |
18.49 |
| 2026-02-24 00:00 |
00:01:28.83 |
+04:01:03.9 |
HIP 6 |
21.50 |