| 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 |
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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
11:49:58.15 |
+05:15:09.0 |
HIP 57636 |
13.35 |
| 2026-07-29 12:00 |
11:50:36.19 |
+05:10:43.2 |
HIP 57713 |
17.70 |
| 2026-07-30 00:00 |
11:51:14.28 |
+05:06:17.0 |
HIP 57713 |
20.30 |
| 2026-07-30 12:00 |
11:51:52.44 |
+05:01:50.6 |
HIP 57713 |
27.04 |
| 2026-07-31 00:00 |
11:52:30.65 |
+04:57:23.8 |
HIP 58027 |
23.87 |
| 2026-07-31 12:00 |
11:53:08.92 |
+04:52:56.8 |
HIP 58027 |
13.88 |
| 2026-08-01 00:00 |
11:53:47.24 |
+04:48:29.4 |
HIP 58027 |
6.08 |
| 2026-08-01 12:00 |
11:54:25.62 |
+04:44:01.8 |
HIP 58027 |
10.16 |
| 2026-08-02 00:00 |
11:55:04.05 |
+04:39:33.9 |
HIP 58027 |
19.82 |
| 2026-08-02 12:00 |
11:55:42.53 |
+04:35:05.7 |
HIP 58027 |
30.11 |
| 2026-08-03 00:00 |
11:56:21.08 |
+04:30:37.2 |
HIP 58224 |
26.89 |
| 2026-08-03 12:00 |
11:56:59.67 |
+04:26:08.5 |
HIP 58403 |
23.31 |
| 2026-08-04 00:00 |
11:57:38.32 |
+04:21:39.4 |
HIP 58403 |
13.03 |
| 2026-08-04 12:00 |
11:58:17.02 |
+04:17:10.2 |
HIP 58403 |
4.64 |
| 2026-08-05 00:00 |
11:58:55.77 |
+04:12:40.6 |
HIP 58403 |
10.01 |
| 2026-08-05 12:00 |
11:59:34.58 |
+04:08:10.8 |
HIP 58564 |
14.49 |
| 2026-08-06 00:00 |
12:00:13.44 |
+04:03:40.8 |
HIP 58564 |
5.18 |
| 2026-08-06 12:00 |
12:00:52.35 |
+03:59:10.5 |
HIP 58564 |
8.50 |
| 2026-08-07 00:00 |
12:01:31.31 |
+03:54:39.9 |
HIP 58610 |
17.54 |
| 2026-08-07 12:00 |
12:02:10.32 |
+03:50:09.2 |
HIP 58610 |
19.36 |
| 2026-08-08 00:00 |
12:02:49.38 |
+03:45:38.2 |
HIP 58744 |
23.15 |
| 2026-08-08 12:00 |
12:03:28.50 |
+03:41:06.9 |
HIP 58895 |
19.77 |
| 2026-08-09 00:00 |
12:04:07.66 |
+03:36:35.5 |
HIP 58895 |
9.09 |
| 2026-08-09 12:00 |
12:04:46.88 |
+03:32:03.8 |
HIP 58895 |
2.52 |
| 2026-08-10 00:00 |
12:05:26.14 |
+03:27:31.9 |
HIP 58895 |
12.76 |
| 2026-08-10 12:00 |
12:06:05.45 |
+03:22:59.8 |
HIP 58895 |
23.52 |
| 2026-08-11 00:00 |
12:06:44.81 |
+03:18:27.5 |
HIP 59187 |
31.39 |
| 2026-08-11 12:00 |
12:07:24.22 |
+03:13:55.0 |
HIP 59215 |
20.73 |
| 2026-08-12 00:00 |
12:08:03.68 |
+03:09:22.4 |
HIP 59215 |
9.93 |
| 2026-08-12 12:00 |
12:08:43.18 |
+03:04:49.5 |
HIP 59215 |
1.74 |
| 2026-08-13 00:00 |
12:09:22.73 |
+03:00:16.5 |
HIP 59263 |
6.13 |
| 2026-08-13 12:00 |
12:10:02.32 |
+02:55:43.3 |
HIP 59263 |
14.72 |
| 2026-08-14 00:00 |
12:10:41.96 |
+02:51:09.9 |
HIP 59441 |
19.39 |
| 2026-08-14 12:00 |
12:11:21.65 |
+02:46:36.4 |
HIP 59441 |
10.49 |
| 2026-08-15 00:00 |
12:12:01.38 |
+02:42:02.8 |
HIP 59441 |
9.07 |
| 2026-08-15 12:00 |
12:12:41.15 |
+02:37:29.0 |
HIP 59441 |
17.13 |
| 2026-08-16 00:00 |
12:13:20.97 |
+02:32:55.1 |
HIP 59646 |
19.37 |
| 2026-08-16 12:00 |
12:14:00.82 |
+02:28:21.0 |
HIP 59646 |
12.80 |
| 2026-08-17 00:00 |
12:14:40.72 |
+02:23:46.8 |
HIP 59646 |
13.87 |
| 2026-08-17 12:00 |
12:15:20.67 |
+02:19:12.5 |
HIP 59646 |
21.50 |
| 2026-08-18 00:00 |
12:16:00.65 |
+02:14:38.1 |
HIP 59646 |
31.20 |
| 2026-08-18 12:00 |
12:16:40.67 |
+02:10:03.6 |
HIP 59900 |
28.13 |
| 2026-08-19 00:00 |
12:17:20.74 |
+02:05:29.0 |
HIP 59900 |
22.97 |