| 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) |
| 2026-05-12 00:00 |
00:31:35.32 |
+07:41:59.1 |
HIP 2609 |
24.03 |
| 2026-05-12 12:00 |
00:31:45.37 |
+07:43:20.6 |
HIP 2609 |
22.12 |
| 2026-05-13 00:00 |
00:31:55.37 |
+07:44:41.9 |
HIP 2609 |
20.44 |
| 2026-05-13 12:00 |
00:32:05.33 |
+07:46:03.0 |
HIP 2609 |
19.04 |
| 2026-05-14 00:00 |
00:32:15.24 |
+07:47:23.8 |
HIP 2609 |
17.97 |
| 2026-05-14 12:00 |
00:32:25.09 |
+07:48:44.4 |
HIP 2609 |
17.31 |
| 2026-05-15 00:00 |
00:32:34.90 |
+07:50:04.8 |
HIP 2609 |
17.08 |
| 2026-05-15 12:00 |
00:32:44.65 |
+07:51:24.9 |
HIP 2609 |
17.30 |
| 2026-05-16 00:00 |
00:32:54.36 |
+07:52:44.7 |
HIP 2609 |
17.94 |
| 2026-05-16 12:00 |
00:33:04.01 |
+07:54:04.4 |
HIP 2609 |
18.97 |
| 2026-05-17 00:00 |
00:33:13.61 |
+07:55:23.7 |
HIP 2609 |
20.30 |
| 2026-05-17 12:00 |
00:33:23.16 |
+07:56:42.9 |
HIP 2594 |
21.33 |
| 2026-05-18 00:00 |
00:33:32.65 |
+07:58:01.7 |
HIP 2594 |
21.05 |
| 2026-05-18 12:00 |
00:33:42.09 |
+07:59:20.3 |
HIP 2594 |
21.11 |
| 2026-05-19 00:00 |
00:33:51.48 |
+08:00:38.6 |
HIP 2594 |
21.51 |
| 2026-05-19 12:00 |
00:34:00.81 |
+08:01:56.7 |
HIP 2594 |
22.21 |
| 2026-05-20 00:00 |
00:34:10.08 |
+08:03:14.4 |
HIP 2594 |
23.18 |
| 2026-05-20 12:00 |
00:34:19.30 |
+08:04:32.0 |
HIP 2751 |
24.28 |
| 2026-05-21 00:00 |
00:34:28.46 |
+08:05:49.2 |
HIP 2751 |
24.43 |
| 2026-05-21 12:00 |
00:34:37.57 |
+08:07:06.1 |
HIP 2751 |
24.84 |
| 2026-05-22 00:00 |
00:34:46.61 |
+08:08:22.8 |
HIP 2751 |
25.52 |
| 2026-05-22 12:00 |
00:34:55.61 |
+08:09:39.1 |
HIP 2751 |
26.42 |
| 2026-05-23 00:00 |
00:35:04.54 |
+08:10:55.2 |
HIP 2751 |
27.53 |
| 2026-05-23 12:00 |
00:35:13.41 |
+08:12:11.0 |
HIP 2751 |
28.82 |
| 2026-05-24 00:00 |
00:35:22.22 |
+08:13:26.5 |
HIP 2751 |
30.26 |
| 2026-05-24 12:00 |
00:35:30.98 |
+08:14:41.7 |
HIP 2751 |
31.83 |
| 2026-05-25 00:00 |
00:35:39.67 |
+08:15:56.6 |
HIP 2751 |
33.50 |
| 2026-05-25 12:00 |
00:35:48.31 |
+08:17:11.1 |
HIP 2751 |
35.26 |
| 2026-05-26 00:00 |
00:35:56.88 |
+08:18:25.4 |
HIP 2873 |
34.70 |
| 2026-05-26 12:00 |
00:36:05.39 |
+08:19:39.4 |
HIP 2873 |
33.13 |
| 2026-05-27 00:00 |
00:36:13.84 |
+08:20:53.0 |
HIP 2873 |
31.67 |
| 2026-05-27 12:00 |
00:36:22.23 |
+08:22:06.4 |
HIP 2873 |
30.35 |
| 2026-05-28 00:00 |
00:36:30.56 |
+08:23:19.4 |
HIP 2873 |
29.17 |
| 2026-05-28 12:00 |
00:36:38.82 |
+08:24:32.1 |
HIP 2873 |
28.15 |
| 2026-05-29 00:00 |
00:36:47.02 |
+08:25:44.5 |
HIP 3017 |
26.27 |
| 2026-05-29 12:00 |
00:36:55.15 |
+08:26:56.5 |
HIP 3017 |
23.95 |
| 2026-05-30 00:00 |
00:37:03.22 |
+08:28:08.3 |
HIP 3017 |
21.65 |
| 2026-05-30 12:00 |
00:37:11.23 |
+08:29:19.7 |
HIP 3017 |
19.37 |
| 2026-05-31 00:00 |
00:37:19.17 |
+08:30:30.7 |
HIP 3017 |
17.12 |
| 2026-05-31 12:00 |
00:37:27.05 |
+08:31:41.4 |
HIP 3017 |
14.89 |
| 2026-06-01 00:00 |
00:37:34.86 |
+08:32:51.8 |
HIP 3017 |
12.70 |
| 2026-06-01 12:00 |
00:37:42.60 |
+08:34:01.9 |
HIP 3017 |
10.56 |
| 2026-06-02 00:00 |
00:37:50.28 |
+08:35:11.6 |
HIP 3017 |
8.49 |