| Parameter |
Value |
| Designation |
C/2014 G3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-02-02T13:50:16.434240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:52Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
12.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-09-25.0000000 |
| e |
0.91564120 |
| q (au) |
4.697983 |
| a (au) |
55.690492 |
| i (deg) |
155.824547 |
| Ω (om, deg) |
4.542217 |
| ω (w, deg) |
147.803219 |
| M (ma, deg) |
359.690331 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.926 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.926 |
| n |
6.000 |
| gf |
0.941 |
| gb |
-0.837 |
| k |
0.999 |
| δ90 |
9.845 |
| 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) |
| 2026-09-20 00:00 |
05:45:55.98 |
-00:07:56.7 |
HIP 27101 |
17.37 |
| 2026-09-20 12:00 |
05:45:55.18 |
-00:08:26.7 |
HIP 27101 |
17.30 |
| 2026-09-21 00:00 |
05:45:54.34 |
-00:08:56.8 |
HIP 27101 |
17.25 |
| 2026-09-21 12:00 |
05:45:53.45 |
-00:09:26.9 |
HIP 27101 |
17.20 |
| 2026-09-22 00:00 |
05:45:52.52 |
-00:09:57.0 |
HIP 27101 |
17.15 |
| 2026-09-22 12:00 |
05:45:51.55 |
-00:10:27.1 |
HIP 27101 |
17.12 |
| 2026-09-23 00:00 |
05:45:50.53 |
-00:10:57.3 |
HIP 27101 |
17.09 |
| 2026-09-23 12:00 |
05:45:49.47 |
-00:11:27.4 |
HIP 27101 |
17.07 |
| 2026-09-24 00:00 |
05:45:48.36 |
-00:11:57.6 |
HIP 27101 |
17.06 |
| 2026-09-24 12:00 |
05:45:47.21 |
-00:12:27.8 |
HIP 27101 |
17.07 |
| 2026-09-25 00:00 |
05:45:46.02 |
-00:12:58.0 |
HIP 27101 |
17.08 |
| 2026-09-25 12:00 |
05:45:44.78 |
-00:13:28.2 |
HIP 27101 |
17.10 |
| 2026-09-26 00:00 |
05:45:43.50 |
-00:13:58.5 |
HIP 27101 |
17.14 |
| 2026-09-26 12:00 |
05:45:42.17 |
-00:14:28.7 |
HIP 27101 |
17.18 |
| 2026-09-27 00:00 |
05:45:40.81 |
-00:14:58.9 |
HIP 27101 |
17.24 |
| 2026-09-27 12:00 |
05:45:39.39 |
-00:15:29.1 |
HIP 27101 |
17.31 |
| 2026-09-28 00:00 |
05:45:37.94 |
-00:15:59.4 |
HIP 27101 |
17.40 |
| 2026-09-28 12:00 |
05:45:36.44 |
-00:16:29.6 |
HIP 27101 |
17.50 |
| 2026-09-29 00:00 |
05:45:34.89 |
-00:16:59.8 |
HIP 27101 |
17.62 |
| 2026-09-29 12:00 |
05:45:33.31 |
-00:17:30.0 |
HIP 27101 |
17.75 |
| 2026-09-30 00:00 |
05:45:31.67 |
-00:18:00.2 |
HIP 27101 |
17.89 |
| 2026-09-30 12:00 |
05:45:30.00 |
-00:18:30.3 |
HIP 27101 |
18.05 |
| 2026-10-01 00:00 |
05:45:28.28 |
-00:19:00.5 |
HIP 27101 |
18.23 |
| 2026-10-01 12:00 |
05:45:26.52 |
-00:19:30.6 |
HIP 27101 |
18.42 |
| 2026-10-02 00:00 |
05:45:24.71 |
-00:20:00.8 |
HIP 27101 |
18.63 |
| 2026-10-02 12:00 |
05:45:22.86 |
-00:20:30.9 |
HIP 27101 |
18.86 |
| 2026-10-03 00:00 |
05:45:20.96 |
-00:21:00.9 |
HIP 27101 |
19.10 |
| 2026-10-03 12:00 |
05:45:19.03 |
-00:21:31.0 |
HIP 27101 |
19.36 |
| 2026-10-04 00:00 |
05:45:17.04 |
-00:22:01.0 |
HIP 27073 |
19.44 |
| 2026-10-04 12:00 |
05:45:15.02 |
-00:22:31.0 |
HIP 27073 |
18.73 |
| 2026-10-05 00:00 |
05:45:12.95 |
-00:23:00.9 |
HIP 27073 |
18.02 |
| 2026-10-05 12:00 |
05:45:10.83 |
-00:23:30.8 |
HIP 27073 |
17.30 |
| 2026-10-06 00:00 |
05:45:08.68 |
-00:24:00.7 |
HIP 27073 |
16.57 |
| 2026-10-06 12:00 |
05:45:06.48 |
-00:24:30.5 |
HIP 27073 |
15.84 |
| 2026-10-07 00:00 |
05:45:04.23 |
-00:25:00.3 |
HIP 27073 |
15.11 |
| 2026-10-07 12:00 |
05:45:01.94 |
-00:25:30.1 |
HIP 27073 |
14.37 |
| 2026-10-08 00:00 |
05:44:59.61 |
-00:25:59.8 |
HIP 27073 |
13.63 |
| 2026-10-08 12:00 |
05:44:57.24 |
-00:26:29.4 |
HIP 27073 |
12.88 |
| 2026-10-09 00:00 |
05:44:54.82 |
-00:26:59.0 |
HIP 27073 |
12.14 |
| 2026-10-09 12:00 |
05:44:52.36 |
-00:27:28.5 |
HIP 27073 |
11.39 |
| 2026-10-10 00:00 |
05:44:49.85 |
-00:27:58.0 |
HIP 27073 |
10.65 |
| 2026-10-10 12:00 |
05:44:47.30 |
-00:28:27.4 |
HIP 27073 |
9.90 |
| 2026-10-11 00:00 |
05:44:44.71 |
-00:28:56.7 |
HIP 27073 |
9.17 |