| Parameter |
Value |
| Designation |
C/2010 D4 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-03-30T22:23:21.324480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:40Z |
| Obs used |
113 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-04-12.0000000 |
| e |
0.88945973 |
| q (au) |
7.148209 |
| a (au) |
64.666104 |
| i (deg) |
105.659652 |
| Ω (om, deg) |
266.783514 |
| ω (w, deg) |
44.489319 |
| M (ma, deg) |
0.714674 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.542 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.542 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.818 |
| 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) |
| 2026-06-01 00:00 |
05:52:26.91 |
+30:59:12.1 |
HIP 27675 |
24.61 |
| 2026-06-01 12:00 |
05:52:31.04 |
+30:59:03.3 |
HIP 27675 |
24.92 |
| 2026-06-02 00:00 |
05:52:35.18 |
+30:58:54.6 |
HIP 27675 |
25.27 |
| 2026-06-02 12:00 |
05:52:39.34 |
+30:58:46.0 |
HIP 27675 |
25.65 |
| 2026-06-03 00:00 |
05:52:43.50 |
+30:58:37.4 |
HIP 27675 |
26.05 |
| 2026-06-03 12:00 |
05:52:47.67 |
+30:58:28.9 |
HIP 27825 |
26.29 |
| 2026-06-04 00:00 |
05:52:51.85 |
+30:58:20.4 |
HIP 27825 |
25.95 |
| 2026-06-04 12:00 |
05:52:56.04 |
+30:58:12.0 |
HIP 27825 |
25.64 |
| 2026-06-05 00:00 |
05:53:00.23 |
+30:58:03.7 |
HIP 27825 |
25.37 |
| 2026-06-05 12:00 |
05:53:04.44 |
+30:57:55.4 |
HIP 27825 |
25.12 |
| 2026-06-06 00:00 |
05:53:08.65 |
+30:57:47.1 |
HIP 27825 |
24.90 |
| 2026-06-06 12:00 |
05:53:12.87 |
+30:57:39.0 |
HIP 27825 |
24.72 |
| 2026-06-07 00:00 |
05:53:17.10 |
+30:57:30.8 |
HIP 27825 |
24.57 |
| 2026-06-07 12:00 |
05:53:21.34 |
+30:57:22.8 |
HIP 27825 |
24.46 |
| 2026-06-08 00:00 |
05:53:25.58 |
+30:57:14.8 |
HIP 27825 |
24.38 |
| 2026-06-08 12:00 |
05:53:29.83 |
+30:57:06.8 |
HIP 27825 |
24.34 |
| 2026-06-09 00:00 |
05:53:34.09 |
+30:56:58.9 |
HIP 27825 |
24.33 |
| 2026-06-09 12:00 |
05:53:38.35 |
+30:56:51.1 |
HIP 27825 |
24.36 |
| 2026-06-10 00:00 |
05:53:42.62 |
+30:56:43.3 |
HIP 27825 |
24.43 |
| 2026-06-10 12:00 |
05:53:46.89 |
+30:56:35.6 |
HIP 27825 |
24.53 |
| 2026-06-11 00:00 |
05:53:51.17 |
+30:56:27.9 |
HIP 27825 |
24.67 |
| 2026-06-11 12:00 |
05:53:55.46 |
+30:56:20.3 |
HIP 27825 |
24.84 |
| 2026-06-12 00:00 |
05:53:59.74 |
+30:56:12.8 |
HIP 28022 |
24.82 |
| 2026-06-12 12:00 |
05:54:04.04 |
+30:56:05.3 |
HIP 28022 |
23.98 |
| 2026-06-13 00:00 |
05:54:08.34 |
+30:55:57.8 |
HIP 28022 |
23.15 |
| 2026-06-13 12:00 |
05:54:12.64 |
+30:55:50.4 |
HIP 28022 |
22.33 |
| 2026-06-14 00:00 |
05:54:16.94 |
+30:55:43.1 |
HIP 28022 |
21.51 |
| 2026-06-14 12:00 |
05:54:21.25 |
+30:55:35.8 |
HIP 28022 |
20.71 |
| 2026-06-15 00:00 |
05:54:25.56 |
+30:55:28.6 |
HIP 28022 |
19.91 |
| 2026-06-15 12:00 |
05:54:29.87 |
+30:55:21.5 |
HIP 28022 |
19.14 |
| 2026-06-16 00:00 |
05:54:34.19 |
+30:55:14.4 |
HIP 28022 |
18.37 |
| 2026-06-16 12:00 |
05:54:38.51 |
+30:55:07.3 |
HIP 28022 |
17.62 |
| 2026-06-17 00:00 |
05:54:42.83 |
+30:55:00.3 |
HIP 28022 |
16.89 |
| 2026-06-17 12:00 |
05:54:47.15 |
+30:54:53.4 |
HIP 28022 |
16.18 |
| 2026-06-18 00:00 |
05:54:51.47 |
+30:54:46.5 |
HIP 28022 |
15.50 |
| 2026-06-18 12:00 |
05:54:55.79 |
+30:54:39.7 |
HIP 28022 |
14.85 |
| 2026-06-19 00:00 |
05:55:00.11 |
+30:54:32.9 |
HIP 28022 |
14.22 |
| 2026-06-19 12:00 |
05:55:04.44 |
+30:54:26.2 |
HIP 28022 |
13.64 |
| 2026-06-20 00:00 |
05:55:08.76 |
+30:54:19.5 |
HIP 28022 |
13.09 |
| 2026-06-20 12:00 |
05:55:13.08 |
+30:54:12.9 |
HIP 28022 |
12.59 |
| 2026-06-21 00:00 |
05:55:17.40 |
+30:54:06.4 |
HIP 28022 |
12.15 |
| 2026-06-21 12:00 |
05:55:21.72 |
+30:53:59.9 |
HIP 28022 |
11.76 |
| 2026-06-22 00:00 |
05:55:26.04 |
+30:53:53.5 |
HIP 28022 |
11.44 |