| Parameter |
Value |
| Designation |
C/2014 M1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T12:23:10.953600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:56Z |
| Obs used |
86 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-06-02.0000000 |
| e |
1.00235797 |
| q (au) |
5.576695 |
| a (au) |
-2365.040406 |
| i (deg) |
160.176838 |
| Ω (om, deg) |
234.673281 |
| ω (w, deg) |
336.742114 |
| M (ma, deg) |
-0.000733 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.895 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.895 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.854 |
| k |
0.800 |
| δ90 |
9.936 |
| 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) |
| 2026-03-26 00:00 |
09:36:15.49 |
+35:36:09.5 |
HIP 47162 |
7.30 |
| 2026-03-26 12:00 |
09:36:10.05 |
+35:36:10.4 |
HIP 47162 |
8.04 |
| 2026-03-27 00:00 |
09:36:04.65 |
+35:36:10.9 |
HIP 47162 |
8.85 |
| 2026-03-27 12:00 |
09:35:59.28 |
+35:36:11.0 |
HIP 47162 |
9.72 |
| 2026-03-28 00:00 |
09:35:53.96 |
+35:36:10.9 |
HIP 47162 |
10.62 |
| 2026-03-28 12:00 |
09:35:48.69 |
+35:36:10.4 |
HIP 47162 |
11.55 |
| 2026-03-29 00:00 |
09:35:43.45 |
+35:36:09.5 |
HIP 47162 |
12.49 |
| 2026-03-29 12:00 |
09:35:38.26 |
+35:36:08.4 |
HIP 47080 |
12.51 |
| 2026-03-30 00:00 |
09:35:33.11 |
+35:36:06.9 |
HIP 47080 |
12.61 |
| 2026-03-30 12:00 |
09:35:28.01 |
+35:36:05.0 |
HIP 47080 |
12.80 |
| 2026-03-31 00:00 |
09:35:22.94 |
+35:36:02.8 |
HIP 47080 |
13.07 |
| 2026-03-31 12:00 |
09:35:17.92 |
+35:36:00.4 |
HIP 47080 |
13.41 |
| 2026-04-01 00:00 |
09:35:12.95 |
+35:35:57.5 |
HIP 47080 |
13.83 |
| 2026-04-01 12:00 |
09:35:08.02 |
+35:35:54.4 |
HIP 47080 |
14.30 |
| 2026-04-02 00:00 |
09:35:03.14 |
+35:35:50.9 |
HIP 47080 |
14.83 |
| 2026-04-02 12:00 |
09:34:58.30 |
+35:35:47.1 |
HIP 47080 |
15.40 |
| 2026-04-03 00:00 |
09:34:53.50 |
+35:35:43.0 |
HIP 47080 |
16.01 |
| 2026-04-03 12:00 |
09:34:48.75 |
+35:35:38.6 |
HIP 47080 |
16.66 |
| 2026-04-04 00:00 |
09:34:44.05 |
+35:35:33.8 |
HIP 47080 |
17.33 |
| 2026-04-04 12:00 |
09:34:39.39 |
+35:35:28.7 |
HIP 47080 |
18.03 |
| 2026-04-05 00:00 |
09:34:34.78 |
+35:35:23.3 |
HIP 47080 |
18.74 |
| 2026-04-05 12:00 |
09:34:30.21 |
+35:35:17.6 |
HIP 47080 |
19.47 |
| 2026-04-06 00:00 |
09:34:25.69 |
+35:35:11.6 |
HIP 47080 |
20.22 |
| 2026-04-06 12:00 |
09:34:21.22 |
+35:35:05.3 |
HIP 47080 |
20.97 |
| 2026-04-07 00:00 |
09:34:16.79 |
+35:34:58.7 |
HIP 47080 |
21.74 |
| 2026-04-07 12:00 |
09:34:12.41 |
+35:34:51.7 |
HIP 47080 |
22.50 |
| 2026-04-08 00:00 |
09:34:08.08 |
+35:34:44.4 |
HIP 47080 |
23.28 |
| 2026-04-08 12:00 |
09:34:03.80 |
+35:34:36.9 |
HIP 47080 |
24.05 |
| 2026-04-09 00:00 |
09:33:59.56 |
+35:34:29.0 |
HIP 47080 |
24.83 |
| 2026-04-09 12:00 |
09:33:55.38 |
+35:34:20.8 |
HIP 47080 |
25.61 |
| 2026-04-10 00:00 |
09:33:51.24 |
+35:34:12.4 |
HIP 47080 |
26.39 |
| 2026-04-10 12:00 |
09:33:47.15 |
+35:34:03.6 |
HIP 46766 |
26.38 |
| 2026-04-11 00:00 |
09:33:43.10 |
+35:33:54.5 |
HIP 46766 |
25.75 |
| 2026-04-11 12:00 |
09:33:39.11 |
+35:33:45.1 |
HIP 46766 |
25.14 |
| 2026-04-12 00:00 |
09:33:35.17 |
+35:33:35.5 |
HIP 46766 |
24.56 |
| 2026-04-12 12:00 |
09:33:31.27 |
+35:33:25.5 |
HIP 46766 |
24.00 |
| 2026-04-13 00:00 |
09:33:27.43 |
+35:33:15.2 |
HIP 46766 |
23.47 |
| 2026-04-13 12:00 |
09:33:23.63 |
+35:33:04.7 |
HIP 46766 |
22.96 |
| 2026-04-14 00:00 |
09:33:19.89 |
+35:32:53.9 |
HIP 46766 |
22.48 |
| 2026-04-14 12:00 |
09:33:16.19 |
+35:32:42.7 |
HIP 46766 |
22.03 |
| 2026-04-15 00:00 |
09:33:12.55 |
+35:32:31.3 |
HIP 46766 |
21.61 |
| 2026-04-15 12:00 |
09:33:08.95 |
+35:32:19.6 |
HIP 46766 |
21.22 |
| 2026-04-16 00:00 |
09:33:05.41 |
+35:32:07.6 |
HIP 46766 |
20.86 |