| 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) |
| 2026-05-12 00:00 |
04:55:39.45 |
+07:08:59.0 |
HIP 22916 |
15.69 |
| 2026-05-12 12:00 |
04:55:42.33 |
+07:09:08.7 |
HIP 22916 |
15.38 |
| 2026-05-13 00:00 |
04:55:45.21 |
+07:09:18.4 |
HIP 22916 |
15.10 |
| 2026-05-13 12:00 |
04:55:48.10 |
+07:09:27.9 |
HIP 22916 |
14.86 |
| 2026-05-14 00:00 |
04:55:51.01 |
+07:09:37.3 |
HIP 22916 |
14.65 |
| 2026-05-14 12:00 |
04:55:53.92 |
+07:09:46.7 |
HIP 22916 |
14.47 |
| 2026-05-15 00:00 |
04:55:56.85 |
+07:09:55.9 |
HIP 22916 |
14.34 |
| 2026-05-15 12:00 |
04:55:59.78 |
+07:10:05.1 |
HIP 22916 |
14.24 |
| 2026-05-16 00:00 |
04:56:02.72 |
+07:10:14.1 |
HIP 22916 |
14.18 |
| 2026-05-16 12:00 |
04:56:05.68 |
+07:10:23.1 |
HIP 22916 |
14.17 |
| 2026-05-17 00:00 |
04:56:08.64 |
+07:10:32.0 |
HIP 22916 |
14.19 |
| 2026-05-17 12:00 |
04:56:11.61 |
+07:10:40.8 |
HIP 22916 |
14.26 |
| 2026-05-18 00:00 |
04:56:14.59 |
+07:10:49.5 |
HIP 22916 |
14.37 |
| 2026-05-18 12:00 |
04:56:17.57 |
+07:10:58.1 |
HIP 22916 |
14.52 |
| 2026-05-19 00:00 |
04:56:20.57 |
+07:11:06.6 |
HIP 22916 |
14.71 |
| 2026-05-19 12:00 |
04:56:23.57 |
+07:11:15.0 |
HIP 22916 |
14.93 |
| 2026-05-20 00:00 |
04:56:26.58 |
+07:11:23.3 |
HIP 22916 |
15.20 |
| 2026-05-20 12:00 |
04:56:29.60 |
+07:11:31.5 |
HIP 22916 |
15.50 |
| 2026-05-21 00:00 |
04:56:32.62 |
+07:11:39.6 |
HIP 22916 |
15.83 |
| 2026-05-21 12:00 |
04:56:35.65 |
+07:11:47.6 |
HIP 22916 |
16.19 |
| 2026-05-22 00:00 |
04:56:38.69 |
+07:11:55.5 |
HIP 22916 |
16.58 |
| 2026-05-22 12:00 |
04:56:41.74 |
+07:12:03.3 |
HIP 23057 |
16.67 |
| 2026-05-23 00:00 |
04:56:44.79 |
+07:12:11.0 |
HIP 23057 |
15.93 |
| 2026-05-23 12:00 |
04:56:47.84 |
+07:12:18.6 |
HIP 23057 |
15.18 |
| 2026-05-24 00:00 |
04:56:50.91 |
+07:12:26.1 |
HIP 23057 |
14.44 |
| 2026-05-24 12:00 |
04:56:53.97 |
+07:12:33.5 |
HIP 23057 |
13.70 |
| 2026-05-25 00:00 |
04:56:57.05 |
+07:12:40.8 |
HIP 23057 |
12.97 |
| 2026-05-25 12:00 |
04:57:00.12 |
+07:12:48.0 |
HIP 23057 |
12.24 |
| 2026-05-26 00:00 |
04:57:03.21 |
+07:12:55.1 |
HIP 23057 |
11.52 |
| 2026-05-26 12:00 |
04:57:06.29 |
+07:13:02.1 |
HIP 23057 |
10.80 |
| 2026-05-27 00:00 |
04:57:09.39 |
+07:13:09.0 |
HIP 23057 |
10.09 |
| 2026-05-27 12:00 |
04:57:12.48 |
+07:13:15.8 |
HIP 23057 |
9.39 |
| 2026-05-28 00:00 |
04:57:15.58 |
+07:13:22.4 |
HIP 23057 |
8.70 |
| 2026-05-28 12:00 |
04:57:18.69 |
+07:13:29.0 |
HIP 23057 |
8.03 |
| 2026-05-29 00:00 |
04:57:21.79 |
+07:13:35.5 |
HIP 23057 |
7.39 |
| 2026-05-29 12:00 |
04:57:24.90 |
+07:13:41.8 |
HIP 23057 |
6.77 |
| 2026-05-30 00:00 |
04:57:28.02 |
+07:13:48.1 |
HIP 23057 |
6.19 |
| 2026-05-30 12:00 |
04:57:31.14 |
+07:13:54.3 |
HIP 23057 |
5.65 |
| 2026-05-31 00:00 |
04:57:34.26 |
+07:14:00.3 |
HIP 23057 |
5.19 |
| 2026-05-31 12:00 |
04:57:37.38 |
+07:14:06.2 |
HIP 23057 |
4.80 |
| 2026-06-01 00:00 |
04:57:40.50 |
+07:14:12.1 |
HIP 23057 |
4.52 |
| 2026-06-01 12:00 |
04:57:43.63 |
+07:14:17.8 |
HIP 23057 |
4.37 |
| 2026-06-02 00:00 |
04:57:46.76 |
+07:14:23.4 |
HIP 23057 |
4.35 |