356P/WISE
| Parameter |
Value |
| Designation |
356P/WISE |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-12-17T02:14:08.306880Z |
| Orbit solution date (soln_date, UTC) |
2025-09-16T12:43:07Z |
| Obs used |
212 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
25.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-02-13.0000000 |
| e |
0.35414993 |
| q (au) |
2.689674 |
| a (au) |
4.164548 |
| i (deg) |
9.629239 |
| Ω (om, deg) |
160.807857 |
| ω (w, deg) |
226.167708 |
| M (ma, deg) |
6.715560 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.412 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.412 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.913 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
23:02:38.89 |
-07:58:56.2 |
HIP 113805 |
9.65 |
| 2026-02-03 12:00 |
23:03:26.61 |
-07:54:52.4 |
HIP 113805 |
11.52 |
| 2026-02-04 00:00 |
23:04:14.37 |
-07:50:47.9 |
HIP 113996 |
16.49 |
| 2026-02-04 12:00 |
23:05:02.19 |
-07:46:42.7 |
HIP 114006 |
4.29 |
| 2026-02-05 00:00 |
23:05:50.05 |
-07:42:36.8 |
HIP 114006 |
8.26 |
| 2026-02-05 12:00 |
23:06:37.96 |
-07:38:30.3 |
HIP 114164 |
8.94 |
| 2026-02-06 00:00 |
23:07:25.92 |
-07:34:23.1 |
HIP 114164 |
8.09 |
| 2026-02-06 12:00 |
23:08:13.92 |
-07:30:15.2 |
HIP 114257 |
14.41 |
| 2026-02-07 00:00 |
23:09:01.97 |
-07:26:06.7 |
HIP 114323 |
7.65 |
| 2026-02-07 12:00 |
23:09:50.07 |
-07:21:57.6 |
HIP 114323 |
10.06 |
| 2026-02-08 00:00 |
23:10:38.21 |
-07:17:47.7 |
HIP 114370 |
17.40 |
| 2026-02-08 12:00 |
23:11:26.40 |
-07:13:37.3 |
HIP 114370 |
25.53 |
| 2026-02-09 00:00 |
23:12:14.63 |
-07:09:26.2 |
HIP 114595 |
15.69 |
| 2026-02-09 12:00 |
23:13:02.91 |
-07:05:14.5 |
HIP 114595 |
8.48 |
| 2026-02-10 00:00 |
23:13:51.23 |
-07:01:02.2 |
HIP 114595 |
14.84 |
| 2026-02-10 12:00 |
23:14:39.59 |
-06:56:49.3 |
HIP 114860 |
19.48 |
| 2026-02-11 00:00 |
23:15:28.00 |
-06:52:35.8 |
HIP 114860 |
7.16 |
| 2026-02-11 12:00 |
23:16:16.45 |
-06:48:21.7 |
HIP 114860 |
6.90 |
| 2026-02-12 00:00 |
23:17:04.94 |
-06:44:07.0 |
HIP 114860 |
19.23 |
| 2026-02-12 12:00 |
23:17:53.48 |
-06:39:51.7 |
HIP 114860 |
31.91 |
| 2026-02-13 00:00 |
23:18:42.05 |
-06:35:35.9 |
HIP 115260 |
30.12 |
| 2026-02-13 12:00 |
23:19:30.67 |
-06:31:19.5 |
HIP 115252 |
17.36 |
| 2026-02-14 00:00 |
23:20:19.33 |
-06:27:02.6 |
HIP 115252 |
4.75 |
| 2026-02-14 12:00 |
23:21:08.03 |
-06:22:45.1 |
HIP 115252 |
8.53 |
| 2026-02-15 00:00 |
23:21:56.77 |
-06:18:27.0 |
HIP 115311 |
12.39 |
| 2026-02-15 12:00 |
23:22:45.55 |
-06:14:08.5 |
HIP 115311 |
22.56 |
| 2026-02-16 00:00 |
23:23:34.36 |
-06:09:49.4 |
HIP 115639 |
31.16 |
| 2026-02-16 12:00 |
23:24:23.22 |
-06:05:29.8 |
HIP 115639 |
18.29 |
| 2026-02-17 00:00 |
23:25:12.11 |
-06:01:09.7 |
HIP 115639 |
5.49 |
| 2026-02-17 12:00 |
23:26:01.04 |
-05:56:49.1 |
HIP 115639 |
7.69 |
| 2026-02-18 00:00 |
23:26:50.01 |
-05:52:28.1 |
HIP 115639 |
20.55 |
| 2026-02-18 12:00 |
23:27:39.01 |
-05:48:06.5 |
HIP 115852 |
9.48 |
| 2026-02-19 00:00 |
23:28:28.05 |
-05:43:44.5 |
HIP 115852 |
6.00 |
| 2026-02-19 12:00 |
23:29:17.13 |
-05:39:22.0 |
HIP 115892 |
17.71 |
| 2026-02-20 00:00 |
23:30:06.24 |
-05:34:59.1 |
HIP 115892 |
22.95 |
| 2026-02-20 12:00 |
23:30:55.39 |
-05:30:35.8 |
HIP 116057 |
26.96 |
| 2026-02-21 00:00 |
23:31:44.57 |
-05:26:12.0 |
HIP 116227 |
22.55 |
| 2026-02-21 12:00 |
23:32:33.78 |
-05:21:47.8 |
HIP 116227 |
19.08 |
| 2026-02-22 00:00 |
23:33:23.02 |
-05:17:23.1 |
HIP 116294 |
11.10 |
| 2026-02-22 12:00 |
23:34:12.30 |
-05:12:58.1 |
HIP 116294 |
8.15 |
| 2026-02-23 00:00 |
23:35:01.61 |
-05:08:32.7 |
HIP 116294 |
18.71 |
| 2026-02-23 12:00 |
23:35:50.95 |
-05:04:06.9 |
HIP 116587 |
26.52 |
| 2026-02-24 00:00 |
23:36:40.33 |
-04:59:40.7 |
HIP 116587 |
15.67 |