| Parameter |
Value |
| Designation |
P/2015 X6 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-03-18T15:23:43.068480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:20Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-12-22.0000000 |
| e |
0.16962315 |
| q (au) |
2.287338 |
| a (au) |
2.754579 |
| i (deg) |
4.558135 |
| Ω (om, deg) |
107.111954 |
| ω (w, deg) |
329.021808 |
| M (ma, deg) |
341.105692 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.451 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.451 |
| n |
6.000 |
| gf |
0.994 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
10:32:30.56 |
+14:34:00.1 |
HIP 51627 |
5.53 |
| 2026-05-12 12:00 |
10:32:46.78 |
+14:31:46.2 |
HIP 51627 |
5.50 |
| 2026-05-13 00:00 |
10:33:03.28 |
+14:29:30.8 |
HIP 51627 |
8.47 |
| 2026-05-13 12:00 |
10:33:20.04 |
+14:27:13.9 |
HIP 51627 |
12.51 |
| 2026-05-14 00:00 |
10:33:37.07 |
+14:24:55.5 |
HIP 51627 |
16.94 |
| 2026-05-14 12:00 |
10:33:54.36 |
+14:22:35.5 |
HIP 51627 |
21.56 |
| 2026-05-15 00:00 |
10:34:11.91 |
+14:20:14.0 |
HIP 51627 |
26.30 |
| 2026-05-15 12:00 |
10:34:29.73 |
+14:17:51.0 |
HIP 51627 |
31.15 |
| 2026-05-16 00:00 |
10:34:47.80 |
+14:15:26.6 |
HIP 51949 |
31.31 |
| 2026-05-16 12:00 |
10:35:06.12 |
+14:13:00.6 |
HIP 51949 |
26.27 |
| 2026-05-17 00:00 |
10:35:24.70 |
+14:10:33.2 |
HIP 51949 |
21.17 |
| 2026-05-17 12:00 |
10:35:43.53 |
+14:08:04.4 |
HIP 51949 |
16.02 |
| 2026-05-18 00:00 |
10:36:02.61 |
+14:05:34.1 |
HIP 51949 |
10.86 |
| 2026-05-18 12:00 |
10:36:21.94 |
+14:03:02.4 |
HIP 51949 |
5.80 |
| 2026-05-19 00:00 |
10:36:41.51 |
+14:00:29.3 |
HIP 51949 |
2.48 |
| 2026-05-19 12:00 |
10:37:01.32 |
+13:57:54.7 |
HIP 51949 |
6.11 |
| 2026-05-20 00:00 |
10:37:21.37 |
+13:55:18.8 |
HIP 51949 |
11.37 |
| 2026-05-20 12:00 |
10:37:41.66 |
+13:52:41.5 |
HIP 52070 |
11.63 |
| 2026-05-21 00:00 |
10:38:02.19 |
+13:50:02.9 |
HIP 52070 |
9.09 |
| 2026-05-21 12:00 |
10:38:22.94 |
+13:47:22.9 |
HIP 52070 |
9.70 |
| 2026-05-22 00:00 |
10:38:43.93 |
+13:44:41.6 |
HIP 52070 |
13.10 |
| 2026-05-22 12:00 |
10:39:05.15 |
+13:41:58.9 |
HIP 52070 |
17.81 |
| 2026-05-23 00:00 |
10:39:26.59 |
+13:39:14.9 |
HIP 52249 |
17.01 |
| 2026-05-23 12:00 |
10:39:48.25 |
+13:36:29.7 |
HIP 52249 |
11.20 |
| 2026-05-24 00:00 |
10:40:10.14 |
+13:33:43.1 |
HIP 52249 |
5.61 |
| 2026-05-24 12:00 |
10:40:32.24 |
+13:30:55.3 |
HIP 52249 |
3.10 |
| 2026-05-25 00:00 |
10:40:54.56 |
+13:28:06.3 |
HIP 52249 |
7.87 |
| 2026-05-25 12:00 |
10:41:17.10 |
+13:25:15.9 |
HIP 52249 |
13.80 |
| 2026-05-26 00:00 |
10:41:39.85 |
+13:22:24.4 |
HIP 52249 |
19.93 |
| 2026-05-26 12:00 |
10:42:02.80 |
+13:19:31.6 |
HIP 52249 |
26.16 |
| 2026-05-27 00:00 |
10:42:25.96 |
+13:16:37.6 |
HIP 52333 |
25.90 |
| 2026-05-27 12:00 |
10:42:49.33 |
+13:13:42.4 |
HIP 52519 |
25.79 |
| 2026-05-28 00:00 |
10:43:12.91 |
+13:10:46.0 |
HIP 52519 |
19.38 |
| 2026-05-28 12:00 |
10:43:36.68 |
+13:07:48.5 |
HIP 52519 |
12.96 |
| 2026-05-29 00:00 |
10:44:00.65 |
+13:04:49.7 |
HIP 52519 |
6.63 |
| 2026-05-29 12:00 |
10:44:24.82 |
+13:01:49.8 |
HIP 52519 |
2.43 |
| 2026-05-30 00:00 |
10:44:49.19 |
+12:58:48.8 |
HIP 52519 |
7.48 |
| 2026-05-30 12:00 |
10:45:13.75 |
+12:55:46.6 |
HIP 52519 |
14.00 |
| 2026-05-31 00:00 |
10:45:38.49 |
+12:52:43.3 |
HIP 52683 |
12.67 |
| 2026-05-31 12:00 |
10:46:03.43 |
+12:49:38.8 |
HIP 52683 |
6.15 |
| 2026-06-01 00:00 |
10:46:28.56 |
+12:46:33.2 |
HIP 52683 |
2.81 |
| 2026-06-01 12:00 |
10:46:53.87 |
+12:43:26.6 |
HIP 52683 |
8.55 |
| 2026-06-02 00:00 |
10:47:19.37 |
+12:40:18.8 |
HIP 52683 |
15.34 |