| 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 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
05:07:09.29 |
-73:30:52.5 |
HIP 23719 |
6.98 |
| 2026-06-01 12:00 |
05:07:24.31 |
-73:30:52.8 |
HIP 23719 |
7.79 |
| 2026-06-02 00:00 |
05:07:39.34 |
-73:30:53.6 |
HIP 23719 |
8.65 |
| 2026-06-02 12:00 |
05:07:54.39 |
-73:30:54.9 |
HIP 23719 |
9.54 |
| 2026-06-03 00:00 |
05:08:09.46 |
-73:30:56.8 |
HIP 23719 |
10.47 |
| 2026-06-03 12:00 |
05:08:24.54 |
-73:30:59.1 |
HIP 23719 |
11.41 |
| 2026-06-04 00:00 |
05:08:39.63 |
-73:31:02.0 |
HIP 23719 |
12.38 |
| 2026-06-04 12:00 |
05:08:54.74 |
-73:31:05.4 |
HIP 23719 |
13.35 |
| 2026-06-05 00:00 |
05:09:09.86 |
-73:31:09.3 |
HIP 23719 |
14.34 |
| 2026-06-05 12:00 |
05:09:24.99 |
-73:31:13.7 |
HIP 23719 |
15.34 |
| 2026-06-06 00:00 |
05:09:40.13 |
-73:31:18.6 |
HIP 24290 |
16.03 |
| 2026-06-06 12:00 |
05:09:55.28 |
-73:31:24.1 |
HIP 24290 |
15.20 |
| 2026-06-07 00:00 |
05:10:10.44 |
-73:31:30.0 |
HIP 24290 |
14.41 |
| 2026-06-07 12:00 |
05:10:25.61 |
-73:31:36.5 |
HIP 24290 |
13.67 |
| 2026-06-08 00:00 |
05:10:40.79 |
-73:31:43.5 |
HIP 24290 |
12.99 |
| 2026-06-08 12:00 |
05:10:55.97 |
-73:31:50.9 |
HIP 24290 |
12.37 |
| 2026-06-09 00:00 |
05:11:11.16 |
-73:31:59.0 |
HIP 24290 |
11.82 |
| 2026-06-09 12:00 |
05:11:26.36 |
-73:32:07.5 |
HIP 24290 |
11.36 |
| 2026-06-10 00:00 |
05:11:41.56 |
-73:32:16.5 |
HIP 24290 |
11.00 |
| 2026-06-10 12:00 |
05:11:56.76 |
-73:32:26.1 |
HIP 24290 |
10.74 |
| 2026-06-11 00:00 |
05:12:11.97 |
-73:32:36.1 |
HIP 24290 |
10.60 |
| 2026-06-11 12:00 |
05:12:27.18 |
-73:32:46.7 |
HIP 24290 |
10.58 |
| 2026-06-12 00:00 |
05:12:42.39 |
-73:32:57.8 |
HIP 24290 |
10.68 |
| 2026-06-12 12:00 |
05:12:57.60 |
-73:33:09.5 |
HIP 24507 |
10.63 |
| 2026-06-13 00:00 |
05:13:12.82 |
-73:33:21.6 |
HIP 24507 |
9.54 |
| 2026-06-13 12:00 |
05:13:28.03 |
-73:33:34.2 |
HIP 24507 |
8.44 |
| 2026-06-14 00:00 |
05:13:43.24 |
-73:33:47.4 |
HIP 24507 |
7.34 |
| 2026-06-14 12:00 |
05:13:58.44 |
-73:34:01.1 |
HIP 24507 |
6.24 |
| 2026-06-15 00:00 |
05:14:13.65 |
-73:34:15.3 |
HIP 24507 |
5.14 |
| 2026-06-15 12:00 |
05:14:28.85 |
-73:34:30.0 |
HIP 24507 |
4.04 |
| 2026-06-16 00:00 |
05:14:44.04 |
-73:34:45.2 |
HIP 24507 |
2.94 |
| 2026-06-16 12:00 |
05:14:59.23 |
-73:35:01.0 |
HIP 24507 |
1.84 |
| 2026-06-17 00:00 |
05:15:14.41 |
-73:35:17.2 |
HIP 24507 |
0.74 |
| 2026-06-17 12:00 |
05:15:29.58 |
-73:35:34.0 |
HIP 24507 |
0.42 |
| 2026-06-18 00:00 |
05:15:44.75 |
-73:35:51.2 |
HIP 24507 |
1.50 |
| 2026-06-18 12:00 |
05:15:59.90 |
-73:36:09.0 |
HIP 24507 |
2.61 |
| 2026-06-19 00:00 |
05:16:15.04 |
-73:36:27.3 |
HIP 24507 |
3.72 |
| 2026-06-19 12:00 |
05:16:30.18 |
-73:36:46.1 |
HIP 24507 |
4.83 |
| 2026-06-20 00:00 |
05:16:45.30 |
-73:37:05.4 |
HIP 24507 |
5.95 |
| 2026-06-20 12:00 |
05:17:00.40 |
-73:37:25.2 |
HIP 24507 |
7.06 |
| 2026-06-21 00:00 |
05:17:15.50 |
-73:37:45.6 |
HIP 24507 |
8.18 |
| 2026-06-21 12:00 |
05:17:30.58 |
-73:38:06.4 |
HIP 24507 |
9.30 |
| 2026-06-22 00:00 |
05:17:45.64 |
-73:38:27.7 |
HIP 24507 |
10.42 |