C/2014 W3 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2014 W3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-02-27T04:51:52.917120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:02Z |
| Obs used |
47 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-03-21.0000000 |
| e |
1.00695932 |
| q (au) |
6.066200 |
| a (au) |
-871.665470 |
| i (deg) |
90.112871 |
| Ω (om, deg) |
286.373358 |
| ω (w, deg) |
158.916349 |
| M (ma, deg) |
0.014814 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.948 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.948 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-1.000 |
| 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) |
| 2026-02-03 00:00 |
04:45:47.66 |
-76:23:13.4 |
HIP 22126 |
4.96 |
| 2026-02-03 12:00 |
04:45:36.34 |
-76:22:18.6 |
HIP 22126 |
4.04 |
| 2026-02-04 00:00 |
04:45:25.21 |
-76:21:23.4 |
HIP 22126 |
3.26 |
| 2026-02-04 12:00 |
04:45:14.25 |
-76:20:28.0 |
HIP 22126 |
2.71 |
| 2026-02-05 00:00 |
04:45:03.48 |
-76:19:32.2 |
HIP 22126 |
2.57 |
| 2026-02-05 12:00 |
04:44:52.89 |
-76:18:36.2 |
HIP 22022 |
2.86 |
| 2026-02-06 00:00 |
04:44:42.48 |
-76:17:39.8 |
HIP 22022 |
2.34 |
| 2026-02-06 12:00 |
04:44:32.25 |
-76:16:43.2 |
HIP 22022 |
2.30 |
| 2026-02-07 00:00 |
04:44:22.20 |
-76:15:46.3 |
HIP 22022 |
2.77 |
| 2026-02-07 12:00 |
04:44:12.33 |
-76:14:49.1 |
HIP 22022 |
3.55 |
| 2026-02-08 00:00 |
04:44:02.65 |
-76:13:51.7 |
HIP 22022 |
4.48 |
| 2026-02-08 12:00 |
04:43:53.15 |
-76:12:54.0 |
HIP 22022 |
5.49 |
| 2026-02-09 00:00 |
04:43:43.83 |
-76:11:56.1 |
HIP 22022 |
6.53 |
| 2026-02-09 12:00 |
04:43:34.69 |
-76:10:57.9 |
HIP 22022 |
7.59 |
| 2026-02-10 00:00 |
04:43:25.74 |
-76:09:59.5 |
HIP 22022 |
8.67 |
| 2026-02-10 12:00 |
04:43:16.97 |
-76:09:00.8 |
HIP 22022 |
9.75 |
| 2026-02-11 00:00 |
04:43:08.38 |
-76:08:02.0 |
HIP 22022 |
10.84 |
| 2026-02-11 12:00 |
04:42:59.97 |
-76:07:02.9 |
HIP 22022 |
11.94 |
| 2026-02-12 00:00 |
04:42:51.75 |
-76:06:03.5 |
HIP 22022 |
13.03 |
| 2026-02-12 12:00 |
04:42:43.71 |
-76:05:04.0 |
HIP 22022 |
14.13 |
| 2026-02-13 00:00 |
04:42:35.85 |
-76:04:04.3 |
HIP 22022 |
15.23 |
| 2026-02-13 12:00 |
04:42:28.17 |
-76:03:04.4 |
HIP 22022 |
16.32 |
| 2026-02-14 00:00 |
04:42:20.68 |
-76:02:04.3 |
HIP 22022 |
17.42 |
| 2026-02-14 12:00 |
04:42:13.37 |
-76:01:04.0 |
HIP 22022 |
18.52 |
| 2026-02-15 00:00 |
04:42:06.24 |
-76:00:03.6 |
HIP 22022 |
19.61 |
| 2026-02-15 12:00 |
04:41:59.29 |
-75:59:02.9 |
HIP 22022 |
20.71 |
| 2026-02-16 00:00 |
04:41:52.53 |
-75:58:02.2 |
HIP 22022 |
21.80 |
| 2026-02-16 12:00 |
04:41:45.95 |
-75:57:01.2 |
HIP 22022 |
22.89 |
| 2026-02-17 00:00 |
04:41:39.55 |
-75:56:00.1 |
HIP 22022 |
23.98 |
| 2026-02-17 12:00 |
04:41:33.33 |
-75:54:58.9 |
HIP 22022 |
25.07 |
| 2026-02-18 00:00 |
04:41:27.29 |
-75:53:57.5 |
HIP 22022 |
26.15 |
| 2026-02-18 12:00 |
04:41:21.43 |
-75:52:56.0 |
HIP 22022 |
27.24 |
| 2026-02-19 00:00 |
04:41:15.76 |
-75:51:54.4 |
HIP 21331 |
28.08 |
| 2026-02-19 12:00 |
04:41:10.26 |
-75:50:52.7 |
HIP 21331 |
28.37 |
| 2026-02-20 00:00 |
04:41:04.94 |
-75:49:50.8 |
HIP 21331 |
28.71 |
| 2026-02-20 12:00 |
04:40:59.80 |
-75:48:48.9 |
HIP 21331 |
29.09 |
| 2026-02-21 00:00 |
04:40:54.85 |
-75:47:46.8 |
HIP 21331 |
29.52 |
| 2026-02-21 12:00 |
04:40:50.07 |
-75:46:44.7 |
HIP 21331 |
29.98 |
| 2026-02-22 00:00 |
04:40:45.46 |
-75:45:42.4 |
HIP 21331 |
30.49 |
| 2026-02-22 12:00 |
04:40:41.04 |
-75:44:40.1 |
HIP 21331 |
31.04 |
| 2026-02-23 00:00 |
04:40:36.79 |
-75:43:37.7 |
HIP 21331 |
31.61 |
| 2026-02-23 12:00 |
04:40:32.72 |
-75:42:35.3 |
HIP 21141 |
31.97 |
| 2026-02-24 00:00 |
04:40:28.82 |
-75:41:32.8 |
HIP 21141 |
31.71 |