C/2010 L4 (WISE)
| Parameter |
Value |
| Designation |
C/2010 L4 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-02-23T15:43:33.841920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
7.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-07-08.0000000 |
| e |
0.96471201 |
| q (au) |
2.825536 |
| a (au) |
80.070752 |
| i (deg) |
102.818083 |
| Ω (om, deg) |
125.540169 |
| ω (w, deg) |
95.768618 |
| M (ma, deg) |
0.184805 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.939 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.939 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
21:10:33.96 |
-81:28:43.8 |
HIP 104796 |
11.15 |
| 2026-02-03 12:00 |
21:10:58.64 |
-81:28:39.8 |
HIP 104796 |
10.52 |
| 2026-02-04 00:00 |
21:11:23.32 |
-81:28:36.1 |
HIP 104796 |
9.94 |
| 2026-02-04 12:00 |
21:11:48.00 |
-81:28:32.8 |
HIP 104796 |
9.41 |
| 2026-02-05 00:00 |
21:12:12.67 |
-81:28:29.9 |
HIP 104796 |
8.96 |
| 2026-02-05 12:00 |
21:12:37.34 |
-81:28:27.3 |
HIP 104796 |
8.59 |
| 2026-02-06 00:00 |
21:13:02.01 |
-81:28:25.0 |
HIP 104796 |
8.31 |
| 2026-02-06 12:00 |
21:13:26.67 |
-81:28:23.1 |
HIP 104796 |
8.13 |
| 2026-02-07 00:00 |
21:13:51.32 |
-81:28:21.5 |
HIP 104796 |
8.06 |
| 2026-02-07 12:00 |
21:14:15.97 |
-81:28:20.3 |
HIP 104796 |
8.10 |
| 2026-02-08 00:00 |
21:14:40.61 |
-81:28:19.5 |
HIP 104796 |
8.25 |
| 2026-02-08 12:00 |
21:15:05.24 |
-81:28:19.0 |
HIP 104796 |
8.50 |
| 2026-02-09 00:00 |
21:15:29.86 |
-81:28:18.8 |
HIP 104796 |
8.85 |
| 2026-02-09 12:00 |
21:15:54.47 |
-81:28:19.1 |
HIP 104796 |
9.28 |
| 2026-02-10 00:00 |
21:16:19.07 |
-81:28:19.6 |
HIP 104796 |
9.78 |
| 2026-02-10 12:00 |
21:16:43.65 |
-81:28:20.5 |
HIP 104796 |
10.34 |
| 2026-02-11 00:00 |
21:17:08.23 |
-81:28:21.8 |
HIP 104796 |
10.96 |
| 2026-02-11 12:00 |
21:17:32.79 |
-81:28:23.5 |
HIP 104796 |
11.62 |
| 2026-02-12 00:00 |
21:17:57.33 |
-81:28:25.5 |
HIP 104796 |
12.32 |
| 2026-02-12 12:00 |
21:18:21.86 |
-81:28:27.8 |
HIP 104796 |
13.04 |
| 2026-02-13 00:00 |
21:18:46.37 |
-81:28:30.5 |
HIP 104796 |
13.79 |
| 2026-02-13 12:00 |
21:19:10.86 |
-81:28:33.6 |
HIP 104796 |
14.57 |
| 2026-02-14 00:00 |
21:19:35.34 |
-81:28:37.0 |
HIP 104796 |
15.36 |
| 2026-02-14 12:00 |
21:19:59.79 |
-81:28:40.8 |
HIP 104796 |
16.17 |
| 2026-02-15 00:00 |
21:20:24.23 |
-81:28:45.0 |
HIP 104796 |
16.99 |
| 2026-02-15 12:00 |
21:20:48.64 |
-81:28:49.5 |
HIP 104796 |
17.82 |
| 2026-02-16 00:00 |
21:21:13.03 |
-81:28:54.4 |
HIP 104796 |
18.66 |
| 2026-02-16 12:00 |
21:21:37.40 |
-81:28:59.6 |
HIP 104796 |
19.51 |
| 2026-02-17 00:00 |
21:22:01.74 |
-81:29:05.2 |
HIP 104796 |
20.37 |
| 2026-02-17 12:00 |
21:22:26.06 |
-81:29:11.2 |
HIP 104796 |
21.23 |
| 2026-02-18 00:00 |
21:22:50.35 |
-81:29:17.5 |
HIP 104796 |
22.10 |
| 2026-02-18 12:00 |
21:23:14.61 |
-81:29:24.2 |
HIP 104796 |
22.97 |
| 2026-02-19 00:00 |
21:23:38.84 |
-81:29:31.2 |
HIP 104796 |
23.84 |
| 2026-02-19 12:00 |
21:24:03.05 |
-81:29:38.6 |
HIP 104796 |
24.72 |
| 2026-02-20 00:00 |
21:24:27.22 |
-81:29:46.4 |
HIP 104796 |
25.61 |
| 2026-02-20 12:00 |
21:24:51.37 |
-81:29:54.6 |
HIP 104796 |
26.49 |
| 2026-02-21 00:00 |
21:25:15.48 |
-81:30:03.1 |
HIP 104796 |
27.38 |
| 2026-02-21 12:00 |
21:25:39.56 |
-81:30:11.9 |
HIP 105973 |
28.11 |
| 2026-02-22 00:00 |
21:26:03.60 |
-81:30:21.1 |
HIP 105973 |
27.83 |
| 2026-02-22 12:00 |
21:26:27.61 |
-81:30:30.7 |
HIP 105973 |
27.57 |
| 2026-02-23 00:00 |
21:26:51.58 |
-81:30:40.7 |
HIP 105973 |
27.32 |
| 2026-02-23 12:00 |
21:27:15.52 |
-81:30:51.0 |
HIP 105973 |
27.10 |
| 2026-02-24 00:00 |
21:27:39.42 |
-81:31:01.7 |
HIP 106846 |
26.35 |