| Parameter |
Value |
| Designation |
C/2014 G1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-11-06T16:43:34.233600Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:31Z |
| Obs used |
89 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
12.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-03-11.0000000 |
| e |
0.99470139 |
| q (au) |
5.468636 |
| a (au) |
1032.088644 |
| i (deg) |
165.640250 |
| Ω (om, deg) |
337.927549 |
| ω (w, deg) |
77.054859 |
| M (ma, deg) |
0.003695 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.272 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.272 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.998 |
| 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 |
09:00:37.71 |
+11:10:51.2 |
HIP 44303 |
29.07 |
| 2026-03-26 12:00 |
09:00:34.24 |
+11:11:09.7 |
HIP 44303 |
29.68 |
| 2026-03-27 00:00 |
09:00:30.80 |
+11:11:28.0 |
HIP 44303 |
30.31 |
| 2026-03-27 12:00 |
09:00:27.40 |
+11:11:46.3 |
HIP 44303 |
30.94 |
| 2026-03-28 00:00 |
09:00:24.03 |
+11:12:04.5 |
HIP 44303 |
31.58 |
| 2026-03-28 12:00 |
09:00:20.69 |
+11:12:22.5 |
HIP 44303 |
32.23 |
| 2026-03-29 00:00 |
09:00:17.39 |
+11:12:40.4 |
HIP 44303 |
32.88 |
| 2026-03-29 12:00 |
09:00:14.13 |
+11:12:58.2 |
HIP 44303 |
33.54 |
| 2026-03-30 00:00 |
09:00:10.90 |
+11:13:15.8 |
HIP 44303 |
34.19 |
| 2026-03-30 12:00 |
09:00:07.71 |
+11:13:33.4 |
HIP 44303 |
34.85 |
| 2026-03-31 00:00 |
09:00:04.55 |
+11:13:50.8 |
HIP 44050 |
35.27 |
| 2026-03-31 12:00 |
09:00:01.43 |
+11:14:08.1 |
HIP 44050 |
34.89 |
| 2026-04-01 00:00 |
08:59:58.34 |
+11:14:25.3 |
HIP 44050 |
34.53 |
| 2026-04-01 12:00 |
08:59:55.29 |
+11:14:42.3 |
HIP 44050 |
34.19 |
| 2026-04-02 00:00 |
08:59:52.27 |
+11:14:59.2 |
HIP 44050 |
33.87 |
| 2026-04-02 12:00 |
08:59:49.29 |
+11:15:16.0 |
HIP 44050 |
33.57 |
| 2026-04-03 00:00 |
08:59:46.35 |
+11:15:32.6 |
HIP 44050 |
33.28 |
| 2026-04-03 12:00 |
08:59:43.45 |
+11:15:49.2 |
HIP 44050 |
33.02 |
| 2026-04-04 00:00 |
08:59:40.58 |
+11:16:05.5 |
HIP 44050 |
32.78 |
| 2026-04-04 12:00 |
08:59:37.74 |
+11:16:21.8 |
HIP 44050 |
32.56 |
| 2026-04-05 00:00 |
08:59:34.95 |
+11:16:37.9 |
HIP 44050 |
32.35 |
| 2026-04-05 12:00 |
08:59:32.19 |
+11:16:53.9 |
HIP 44050 |
32.17 |
| 2026-04-06 00:00 |
08:59:29.47 |
+11:17:09.8 |
HIP 44050 |
32.00 |
| 2026-04-06 12:00 |
08:59:26.78 |
+11:17:25.5 |
HIP 44050 |
31.86 |
| 2026-04-07 00:00 |
08:59:24.13 |
+11:17:41.0 |
HIP 44050 |
31.73 |
| 2026-04-07 12:00 |
08:59:21.52 |
+11:17:56.5 |
HIP 44050 |
31.62 |
| 2026-04-08 00:00 |
08:59:18.95 |
+11:18:11.8 |
HIP 44050 |
31.52 |
| 2026-04-08 12:00 |
08:59:16.42 |
+11:18:26.9 |
HIP 44050 |
31.44 |
| 2026-04-09 00:00 |
08:59:13.92 |
+11:18:42.0 |
HIP 44050 |
31.38 |
| 2026-04-09 12:00 |
08:59:11.46 |
+11:18:56.8 |
HIP 44050 |
31.34 |
| 2026-04-10 00:00 |
08:59:09.04 |
+11:19:11.6 |
HIP 44050 |
31.31 |
| 2026-04-10 12:00 |
08:59:06.66 |
+11:19:26.2 |
HIP 44050 |
31.29 |
| 2026-04-11 00:00 |
08:59:04.31 |
+11:19:40.6 |
HIP 44050 |
31.29 |
| 2026-04-11 12:00 |
08:59:02.01 |
+11:19:54.9 |
HIP 44050 |
31.30 |
| 2026-04-12 00:00 |
08:58:59.74 |
+11:20:09.1 |
HIP 44050 |
31.33 |
| 2026-04-12 12:00 |
08:58:57.51 |
+11:20:23.1 |
HIP 44050 |
31.37 |
| 2026-04-13 00:00 |
08:58:55.32 |
+11:20:36.9 |
HIP 44050 |
31.42 |
| 2026-04-13 12:00 |
08:58:53.16 |
+11:20:50.6 |
HIP 44066 |
31.18 |
| 2026-04-14 00:00 |
08:58:51.05 |
+11:21:04.2 |
HIP 44066 |
30.86 |
| 2026-04-14 12:00 |
08:58:48.97 |
+11:21:17.6 |
HIP 44066 |
30.56 |
| 2026-04-15 00:00 |
08:58:46.94 |
+11:21:30.9 |
HIP 44066 |
30.27 |
| 2026-04-15 12:00 |
08:58:44.94 |
+11:21:44.0 |
HIP 43948 |
29.94 |
| 2026-04-16 00:00 |
08:58:42.98 |
+11:21:56.9 |
HIP 43948 |
29.42 |