C/2010 L5 (WISE)
| Parameter |
Value |
| Designation |
C/2010 L5 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-04-23T03:55:12.714240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
34 |
| NEO |
Yes |
| M1 |
18.900 |
| K1 |
4.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-07-02.0000000 |
| e |
0.90421394 |
| q (au) |
0.791169 |
| a (au) |
8.259755 |
| i (deg) |
147.048942 |
| Ω (om, deg) |
206.472272 |
| ω (w, deg) |
214.763588 |
| M (ma, deg) |
2.899591 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.711 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.711 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.597 |
| k |
0.800 |
| 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 |
12:08:42.18 |
+23:45:43.8 |
HIP 59169 |
9.80 |
| 2026-02-03 12:00 |
12:08:36.04 |
+23:47:03.8 |
HIP 59169 |
9.15 |
| 2026-02-04 00:00 |
12:08:29.84 |
+23:48:23.8 |
HIP 59169 |
8.87 |
| 2026-02-04 12:00 |
12:08:23.57 |
+23:49:43.9 |
HIP 59169 |
9.00 |
| 2026-02-05 00:00 |
12:08:17.24 |
+23:51:04.0 |
HIP 59169 |
9.54 |
| 2026-02-05 12:00 |
12:08:10.85 |
+23:52:24.1 |
HIP 59169 |
10.43 |
| 2026-02-06 00:00 |
12:08:04.40 |
+23:53:44.2 |
HIP 59169 |
11.59 |
| 2026-02-06 12:00 |
12:07:57.89 |
+23:55:04.4 |
HIP 59169 |
12.95 |
| 2026-02-07 00:00 |
12:07:51.31 |
+23:56:24.5 |
HIP 59169 |
14.47 |
| 2026-02-07 12:00 |
12:07:44.68 |
+23:57:44.6 |
HIP 59169 |
16.10 |
| 2026-02-08 00:00 |
12:07:37.98 |
+23:59:04.7 |
HIP 59169 |
17.81 |
| 2026-02-08 12:00 |
12:07:31.23 |
+24:00:24.8 |
HIP 59169 |
19.59 |
| 2026-02-09 00:00 |
12:07:24.41 |
+24:01:44.9 |
HIP 59169 |
21.42 |
| 2026-02-09 12:00 |
12:07:17.54 |
+24:03:04.9 |
HIP 59169 |
23.29 |
| 2026-02-10 00:00 |
12:07:10.61 |
+24:04:24.9 |
HIP 59169 |
25.20 |
| 2026-02-10 12:00 |
12:07:03.62 |
+24:05:44.8 |
HIP 59169 |
27.13 |
| 2026-02-11 00:00 |
12:06:56.58 |
+24:07:04.7 |
HIP 59169 |
29.10 |
| 2026-02-11 12:00 |
12:06:49.47 |
+24:08:24.5 |
HIP 59169 |
31.08 |
| 2026-02-12 00:00 |
12:06:42.32 |
+24:09:44.2 |
HIP 59169 |
33.08 |
| 2026-02-12 12:00 |
12:06:35.10 |
+24:11:03.9 |
HIP 58850 |
32.86 |
| 2026-02-13 00:00 |
12:06:27.83 |
+24:12:23.5 |
HIP 58850 |
31.41 |
| 2026-02-13 12:00 |
12:06:20.51 |
+24:13:43.0 |
HIP 58850 |
30.02 |
| 2026-02-14 00:00 |
12:06:13.13 |
+24:15:02.4 |
HIP 58850 |
28.71 |
| 2026-02-14 12:00 |
12:06:05.70 |
+24:16:21.6 |
HIP 58850 |
27.50 |
| 2026-02-15 00:00 |
12:05:58.22 |
+24:17:40.8 |
HIP 58850 |
26.39 |
| 2026-02-15 12:00 |
12:05:50.69 |
+24:18:59.8 |
HIP 58850 |
25.41 |
| 2026-02-16 00:00 |
12:05:43.10 |
+24:20:18.8 |
HIP 58850 |
24.57 |
| 2026-02-16 12:00 |
12:05:35.46 |
+24:21:37.5 |
HIP 58850 |
23.89 |
| 2026-02-17 00:00 |
12:05:27.77 |
+24:22:56.2 |
HIP 58850 |
23.38 |
| 2026-02-17 12:00 |
12:05:20.04 |
+24:24:14.6 |
HIP 58850 |
23.06 |
| 2026-02-18 00:00 |
12:05:12.25 |
+24:25:33.0 |
HIP 58850 |
22.94 |
| 2026-02-18 12:00 |
12:05:04.42 |
+24:26:51.1 |
HIP 58850 |
23.02 |
| 2026-02-19 00:00 |
12:04:56.53 |
+24:28:09.1 |
HIP 58850 |
23.30 |
| 2026-02-19 12:00 |
12:04:48.60 |
+24:29:26.9 |
HIP 58850 |
23.79 |
| 2026-02-20 00:00 |
12:04:40.63 |
+24:30:44.5 |
HIP 58850 |
24.46 |
| 2026-02-20 12:00 |
12:04:32.61 |
+24:32:01.9 |
HIP 58833 |
25.26 |
| 2026-02-21 00:00 |
12:04:24.54 |
+24:33:19.1 |
HIP 58833 |
23.56 |
| 2026-02-21 12:00 |
12:04:16.43 |
+24:34:36.1 |
HIP 58833 |
21.97 |
| 2026-02-22 00:00 |
12:04:08.28 |
+24:35:52.9 |
HIP 58833 |
20.50 |
| 2026-02-22 12:00 |
12:04:00.08 |
+24:37:09.4 |
HIP 58833 |
19.18 |
| 2026-02-23 00:00 |
12:03:51.85 |
+24:38:25.7 |
HIP 58833 |
18.06 |
| 2026-02-23 12:00 |
12:03:43.57 |
+24:39:41.8 |
HIP 58731 |
16.63 |
| 2026-02-24 00:00 |
12:03:35.25 |
+24:40:57.6 |
HIP 58731 |
14.37 |