C/2010 J4 (WISE)
| Parameter |
Value |
| Designation |
C/2010 J4 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-05-03T04:07:06.352320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
43 |
| NEO |
- |
| M1 |
19.600 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-17.0000000 |
| e |
0.99999359 |
| q (au) |
1.085533 |
| a (au) |
169416.296058 |
| i (deg) |
162.296527 |
| Ω (om, deg) |
316.405387 |
| ω (w, deg) |
83.753342 |
| M (ma, deg) |
0.000000 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.561 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.561 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| 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 |
04:53:11.85 |
+06:27:25.4 |
HIP 22627 |
16.49 |
| 2026-02-03 12:00 |
04:53:09.89 |
+06:27:34.6 |
HIP 22627 |
16.00 |
| 2026-02-04 00:00 |
04:53:07.96 |
+06:27:43.8 |
HIP 22627 |
15.51 |
| 2026-02-04 12:00 |
04:53:06.06 |
+06:27:53.2 |
HIP 22627 |
15.03 |
| 2026-02-05 00:00 |
04:53:04.18 |
+06:28:02.7 |
HIP 22627 |
14.55 |
| 2026-02-05 12:00 |
04:53:02.33 |
+06:28:12.2 |
HIP 22627 |
14.09 |
| 2026-02-06 00:00 |
04:53:00.51 |
+06:28:21.9 |
HIP 22627 |
13.63 |
| 2026-02-06 12:00 |
04:52:58.72 |
+06:28:31.7 |
HIP 22627 |
13.19 |
| 2026-02-07 00:00 |
04:52:56.96 |
+06:28:41.5 |
HIP 22627 |
12.75 |
| 2026-02-07 12:00 |
04:52:55.22 |
+06:28:51.5 |
HIP 22627 |
12.32 |
| 2026-02-08 00:00 |
04:52:53.52 |
+06:29:01.5 |
HIP 22627 |
11.90 |
| 2026-02-08 12:00 |
04:52:51.84 |
+06:29:11.7 |
HIP 22627 |
11.49 |
| 2026-02-09 00:00 |
04:52:50.19 |
+06:29:21.9 |
HIP 22627 |
11.09 |
| 2026-02-09 12:00 |
04:52:48.57 |
+06:29:32.3 |
HIP 22627 |
10.70 |
| 2026-02-10 00:00 |
04:52:46.98 |
+06:29:42.7 |
HIP 22627 |
10.32 |
| 2026-02-10 12:00 |
04:52:45.42 |
+06:29:53.2 |
HIP 22627 |
9.96 |
| 2026-02-11 00:00 |
04:52:43.89 |
+06:30:03.9 |
HIP 22627 |
9.61 |
| 2026-02-11 12:00 |
04:52:42.38 |
+06:30:14.6 |
HIP 22627 |
9.27 |
| 2026-02-12 00:00 |
04:52:40.91 |
+06:30:25.4 |
HIP 22627 |
8.94 |
| 2026-02-12 12:00 |
04:52:39.47 |
+06:30:36.3 |
HIP 22627 |
8.63 |
| 2026-02-13 00:00 |
04:52:38.05 |
+06:30:47.2 |
HIP 22627 |
8.33 |
| 2026-02-13 12:00 |
04:52:36.67 |
+06:30:58.3 |
HIP 22627 |
8.05 |
| 2026-02-14 00:00 |
04:52:35.31 |
+06:31:09.5 |
HIP 22627 |
7.79 |
| 2026-02-14 12:00 |
04:52:33.99 |
+06:31:20.7 |
HIP 22627 |
7.54 |
| 2026-02-15 00:00 |
04:52:32.69 |
+06:31:32.0 |
HIP 22627 |
7.32 |
| 2026-02-15 12:00 |
04:52:31.42 |
+06:31:43.4 |
HIP 22627 |
7.11 |
| 2026-02-16 00:00 |
04:52:30.19 |
+06:31:54.9 |
HIP 22627 |
6.92 |
| 2026-02-16 12:00 |
04:52:28.98 |
+06:32:06.4 |
HIP 22627 |
6.76 |
| 2026-02-17 00:00 |
04:52:27.81 |
+06:32:18.1 |
HIP 22627 |
6.61 |
| 2026-02-17 12:00 |
04:52:26.66 |
+06:32:29.8 |
HIP 22627 |
6.49 |
| 2026-02-18 00:00 |
04:52:25.55 |
+06:32:41.6 |
HIP 22627 |
6.40 |
| 2026-02-18 12:00 |
04:52:24.46 |
+06:32:53.5 |
HIP 22627 |
6.32 |
| 2026-02-19 00:00 |
04:52:23.41 |
+06:33:05.4 |
HIP 22627 |
6.27 |
| 2026-02-19 12:00 |
04:52:22.39 |
+06:33:17.5 |
HIP 22627 |
6.24 |
| 2026-02-20 00:00 |
04:52:21.39 |
+06:33:29.5 |
HIP 22627 |
6.24 |
| 2026-02-20 12:00 |
04:52:20.43 |
+06:33:41.7 |
HIP 22627 |
6.25 |
| 2026-02-21 00:00 |
04:52:19.50 |
+06:33:53.9 |
HIP 22627 |
6.29 |
| 2026-02-21 12:00 |
04:52:18.60 |
+06:34:06.3 |
HIP 22627 |
6.34 |
| 2026-02-22 00:00 |
04:52:17.72 |
+06:34:18.6 |
HIP 22627 |
6.42 |
| 2026-02-22 12:00 |
04:52:16.88 |
+06:34:31.1 |
HIP 22627 |
6.51 |
| 2026-02-23 00:00 |
04:52:16.07 |
+06:34:43.6 |
HIP 22627 |
6.62 |
| 2026-02-23 12:00 |
04:52:15.29 |
+06:34:56.1 |
HIP 22627 |
6.74 |
| 2026-02-24 00:00 |
04:52:14.54 |
+06:35:08.8 |
HIP 22627 |
6.87 |