| 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) |
| 2026-07-29 00:00 |
05:43:35.70 |
+00:35:55.0 |
HIP 27107 |
19.80 |
| 2026-07-29 12:00 |
05:43:38.78 |
+00:35:38.3 |
HIP 27107 |
19.01 |
| 2026-07-30 00:00 |
05:43:41.83 |
+00:35:21.4 |
HIP 27107 |
18.22 |
| 2026-07-30 12:00 |
05:43:44.86 |
+00:35:04.4 |
HIP 27107 |
17.45 |
| 2026-07-31 00:00 |
05:43:47.86 |
+00:34:47.1 |
HIP 27107 |
16.68 |
| 2026-07-31 12:00 |
05:43:50.83 |
+00:34:29.6 |
HIP 27107 |
15.92 |
| 2026-08-01 00:00 |
05:43:53.78 |
+00:34:11.9 |
HIP 27107 |
15.18 |
| 2026-08-01 12:00 |
05:43:56.70 |
+00:33:54.1 |
HIP 27107 |
14.44 |
| 2026-08-02 00:00 |
05:43:59.59 |
+00:33:36.0 |
HIP 27107 |
13.72 |
| 2026-08-02 12:00 |
05:44:02.46 |
+00:33:17.8 |
HIP 27107 |
13.01 |
| 2026-08-03 00:00 |
05:44:05.30 |
+00:32:59.3 |
HIP 27107 |
12.32 |
| 2026-08-03 12:00 |
05:44:08.11 |
+00:32:40.7 |
HIP 27107 |
11.65 |
| 2026-08-04 00:00 |
05:44:10.89 |
+00:32:21.9 |
HIP 27107 |
10.99 |
| 2026-08-04 12:00 |
05:44:13.64 |
+00:32:02.9 |
HIP 27107 |
10.36 |
| 2026-08-05 00:00 |
05:44:16.37 |
+00:31:43.7 |
HIP 27107 |
9.75 |
| 2026-08-05 12:00 |
05:44:19.07 |
+00:31:24.3 |
HIP 27107 |
9.18 |
| 2026-08-06 00:00 |
05:44:21.74 |
+00:31:04.7 |
HIP 27107 |
8.63 |
| 2026-08-06 12:00 |
05:44:24.38 |
+00:30:44.9 |
HIP 27107 |
8.13 |
| 2026-08-07 00:00 |
05:44:26.98 |
+00:30:25.0 |
HIP 27107 |
7.67 |
| 2026-08-07 12:00 |
05:44:29.56 |
+00:30:04.9 |
HIP 27107 |
7.27 |
| 2026-08-08 00:00 |
05:44:32.11 |
+00:29:44.6 |
HIP 27107 |
6.92 |
| 2026-08-08 12:00 |
05:44:34.63 |
+00:29:24.1 |
HIP 27107 |
6.65 |
| 2026-08-09 00:00 |
05:44:37.12 |
+00:29:03.4 |
HIP 27107 |
6.45 |
| 2026-08-09 12:00 |
05:44:39.58 |
+00:28:42.5 |
HIP 27107 |
6.33 |
| 2026-08-10 00:00 |
05:44:42.00 |
+00:28:21.5 |
HIP 27107 |
6.30 |
| 2026-08-10 12:00 |
05:44:44.40 |
+00:28:00.3 |
HIP 27107 |
6.34 |
| 2026-08-11 00:00 |
05:44:46.76 |
+00:27:38.9 |
HIP 27107 |
6.47 |
| 2026-08-11 12:00 |
05:44:49.09 |
+00:27:17.4 |
HIP 27107 |
6.68 |
| 2026-08-12 00:00 |
05:44:51.39 |
+00:26:55.7 |
HIP 27107 |
6.94 |
| 2026-08-12 12:00 |
05:44:53.66 |
+00:26:33.8 |
HIP 27107 |
7.27 |
| 2026-08-13 00:00 |
05:44:55.89 |
+00:26:11.7 |
HIP 27107 |
7.64 |
| 2026-08-13 12:00 |
05:44:58.09 |
+00:25:49.5 |
HIP 27107 |
8.06 |
| 2026-08-14 00:00 |
05:45:00.26 |
+00:25:27.1 |
HIP 27107 |
8.50 |
| 2026-08-14 12:00 |
05:45:02.40 |
+00:25:04.5 |
HIP 27107 |
8.97 |
| 2026-08-15 00:00 |
05:45:04.50 |
+00:24:41.8 |
HIP 27107 |
9.47 |
| 2026-08-15 12:00 |
05:45:06.56 |
+00:24:18.9 |
HIP 27107 |
9.98 |
| 2026-08-16 00:00 |
05:45:08.59 |
+00:23:55.8 |
HIP 27107 |
10.51 |
| 2026-08-16 12:00 |
05:45:10.59 |
+00:23:32.6 |
HIP 27107 |
11.05 |
| 2026-08-17 00:00 |
05:45:12.56 |
+00:23:09.3 |
HIP 27107 |
11.59 |
| 2026-08-17 12:00 |
05:45:14.49 |
+00:22:45.8 |
HIP 27107 |
12.14 |
| 2026-08-18 00:00 |
05:45:16.38 |
+00:22:22.1 |
HIP 27107 |
12.70 |
| 2026-08-18 12:00 |
05:45:18.24 |
+00:21:58.3 |
HIP 27107 |
13.26 |
| 2026-08-19 00:00 |
05:45:20.06 |
+00:21:34.3 |
HIP 27107 |
13.83 |