C/2015 V3 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2015 V3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-11-24T20:48:06.068160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:16Z |
| Obs used |
99 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
15.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-01-24.0000000 |
| e |
0.99484386 |
| q (au) |
4.235691 |
| a (au) |
821.484531 |
| i (deg) |
86.231771 |
| Ω (om, deg) |
2.340885 |
| ω (w, deg) |
0.821275 |
| M (ma, deg) |
0.002517 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.207 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.207 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.501 |
| 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 |
13:46:31.17 |
+45:19:15.6 |
HIP 67382 |
23.84 |
| 2026-02-03 12:00 |
13:46:28.78 |
+45:20:15.5 |
HIP 67382 |
24.62 |
| 2026-02-04 00:00 |
13:46:26.32 |
+45:21:15.4 |
HIP 67382 |
25.43 |
| 2026-02-04 12:00 |
13:46:23.80 |
+45:22:15.3 |
HIP 67382 |
26.27 |
| 2026-02-05 00:00 |
13:46:21.22 |
+45:23:15.2 |
HIP 67382 |
27.14 |
| 2026-02-05 12:00 |
13:46:18.57 |
+45:24:15.0 |
HIP 67382 |
28.03 |
| 2026-02-06 00:00 |
13:46:15.87 |
+45:25:14.8 |
HIP 67382 |
28.94 |
| 2026-02-06 12:00 |
13:46:13.11 |
+45:26:14.6 |
HIP 66958 |
29.74 |
| 2026-02-07 00:00 |
13:46:10.28 |
+45:27:14.3 |
HIP 66958 |
29.09 |
| 2026-02-07 12:00 |
13:46:07.40 |
+45:28:13.9 |
HIP 66958 |
28.46 |
| 2026-02-08 00:00 |
13:46:04.45 |
+45:29:13.5 |
HIP 66958 |
27.86 |
| 2026-02-08 12:00 |
13:46:01.44 |
+45:30:13.0 |
HIP 66958 |
27.27 |
| 2026-02-09 00:00 |
13:45:58.38 |
+45:31:12.5 |
HIP 66958 |
26.71 |
| 2026-02-09 12:00 |
13:45:55.25 |
+45:32:11.8 |
HIP 66958 |
26.18 |
| 2026-02-10 00:00 |
13:45:52.06 |
+45:33:11.1 |
HIP 66958 |
25.68 |
| 2026-02-10 12:00 |
13:45:48.81 |
+45:34:10.3 |
HIP 66958 |
25.20 |
| 2026-02-11 00:00 |
13:45:45.51 |
+45:35:09.4 |
HIP 66958 |
24.76 |
| 2026-02-11 12:00 |
13:45:42.14 |
+45:36:08.4 |
HIP 66958 |
24.36 |
| 2026-02-12 00:00 |
13:45:38.71 |
+45:37:07.2 |
HIP 66958 |
23.99 |
| 2026-02-12 12:00 |
13:45:35.23 |
+45:38:06.0 |
HIP 66958 |
23.66 |
| 2026-02-13 00:00 |
13:45:31.68 |
+45:39:04.6 |
HIP 66958 |
23.37 |
| 2026-02-13 12:00 |
13:45:28.08 |
+45:40:03.1 |
HIP 66958 |
23.13 |
| 2026-02-14 00:00 |
13:45:24.41 |
+45:41:01.5 |
HIP 66958 |
22.94 |
| 2026-02-14 12:00 |
13:45:20.69 |
+45:41:59.8 |
HIP 66958 |
22.79 |
| 2026-02-15 00:00 |
13:45:16.91 |
+45:42:57.9 |
HIP 66958 |
22.70 |
| 2026-02-15 12:00 |
13:45:13.08 |
+45:43:55.8 |
HIP 66958 |
22.65 |
| 2026-02-16 00:00 |
13:45:09.18 |
+45:44:53.6 |
HIP 66958 |
22.66 |
| 2026-02-16 12:00 |
13:45:05.23 |
+45:45:51.2 |
HIP 66958 |
22.71 |
| 2026-02-17 00:00 |
13:45:01.22 |
+45:46:48.7 |
HIP 66958 |
22.82 |
| 2026-02-17 12:00 |
13:44:57.15 |
+45:47:45.9 |
HIP 66958 |
22.99 |
| 2026-02-18 00:00 |
13:44:53.02 |
+45:48:43.0 |
HIP 66958 |
23.20 |
| 2026-02-18 12:00 |
13:44:48.84 |
+45:49:39.9 |
HIP 66958 |
23.46 |
| 2026-02-19 00:00 |
13:44:44.61 |
+45:50:36.6 |
HIP 66958 |
23.78 |
| 2026-02-19 12:00 |
13:44:40.31 |
+45:51:33.2 |
HIP 66958 |
24.14 |
| 2026-02-20 00:00 |
13:44:35.96 |
+45:52:29.5 |
HIP 66958 |
24.55 |
| 2026-02-20 12:00 |
13:44:31.56 |
+45:53:25.6 |
HIP 66958 |
25.00 |
| 2026-02-21 00:00 |
13:44:27.10 |
+45:54:21.4 |
HIP 66958 |
25.49 |
| 2026-02-21 12:00 |
13:44:22.59 |
+45:55:17.1 |
HIP 66958 |
26.03 |
| 2026-02-22 00:00 |
13:44:18.02 |
+45:56:12.5 |
HIP 66958 |
26.60 |
| 2026-02-22 12:00 |
13:44:13.40 |
+45:57:07.7 |
HIP 66958 |
27.21 |
| 2026-02-23 00:00 |
13:44:08.73 |
+45:58:02.6 |
HIP 66958 |
27.85 |
| 2026-02-23 12:00 |
13:44:04.00 |
+45:58:57.3 |
HIP 66829 |
27.58 |
| 2026-02-24 00:00 |
13:43:59.22 |
+45:59:51.8 |
HIP 66829 |
26.40 |