| Parameter |
Value |
| Designation |
C/2010 E3 (WISE) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-04-05T12:06:39.401280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-03-07.0000000 |
| e |
0.99221691 |
| q (au) |
2.269055 |
| a (au) |
291.536458 |
| i (deg) |
96.357814 |
| Ω (om, deg) |
117.272465 |
| ω (w, deg) |
50.432753 |
| M (ma, deg) |
359.994158 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.034 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.034 |
| n |
6.000 |
| gf |
0.903 |
| gb |
-0.835 |
| k |
0.998 |
| δ90 |
4.136 |
| 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) |
| 2026-09-20 00:00 |
19:59:07.82 |
-42:29:40.6 |
HIP 98305 |
13.65 |
| 2026-09-20 12:00 |
19:59:05.53 |
-42:29:31.5 |
HIP 98305 |
13.54 |
| 2026-09-21 00:00 |
19:59:03.29 |
-42:29:22.3 |
HIP 98305 |
13.46 |
| 2026-09-21 12:00 |
19:59:01.08 |
-42:29:12.9 |
HIP 98305 |
13.40 |
| 2026-09-22 00:00 |
19:58:58.90 |
-42:29:03.3 |
HIP 98305 |
13.35 |
| 2026-09-22 12:00 |
19:58:56.76 |
-42:28:53.7 |
HIP 98305 |
13.32 |
| 2026-09-23 00:00 |
19:58:54.66 |
-42:28:43.8 |
HIP 98305 |
13.32 |
| 2026-09-23 12:00 |
19:58:52.60 |
-42:28:33.8 |
HIP 98305 |
13.33 |
| 2026-09-24 00:00 |
19:58:50.57 |
-42:28:23.7 |
HIP 98305 |
13.35 |
| 2026-09-24 12:00 |
19:58:48.58 |
-42:28:13.4 |
HIP 98305 |
13.40 |
| 2026-09-25 00:00 |
19:58:46.63 |
-42:28:03.0 |
HIP 98305 |
13.46 |
| 2026-09-25 12:00 |
19:58:44.71 |
-42:27:52.4 |
HIP 98305 |
13.54 |
| 2026-09-26 00:00 |
19:58:42.83 |
-42:27:41.7 |
HIP 98305 |
13.63 |
| 2026-09-26 12:00 |
19:58:40.99 |
-42:27:30.9 |
HIP 98305 |
13.73 |
| 2026-09-27 00:00 |
19:58:39.19 |
-42:27:19.9 |
HIP 98305 |
13.85 |
| 2026-09-27 12:00 |
19:58:37.42 |
-42:27:08.7 |
HIP 98305 |
13.98 |
| 2026-09-28 00:00 |
19:58:35.70 |
-42:26:57.5 |
HIP 98305 |
14.13 |
| 2026-09-28 12:00 |
19:58:34.01 |
-42:26:46.1 |
HIP 98305 |
14.28 |
| 2026-09-29 00:00 |
19:58:32.35 |
-42:26:34.5 |
HIP 98305 |
14.45 |
| 2026-09-29 12:00 |
19:58:30.74 |
-42:26:22.9 |
HIP 98305 |
14.62 |
| 2026-09-30 00:00 |
19:58:29.16 |
-42:26:11.0 |
HIP 98305 |
14.80 |
| 2026-09-30 12:00 |
19:58:27.63 |
-42:25:59.1 |
HIP 98305 |
14.99 |
| 2026-10-01 00:00 |
19:58:26.13 |
-42:25:47.0 |
HIP 98305 |
15.19 |
| 2026-10-01 12:00 |
19:58:24.67 |
-42:25:34.8 |
HIP 98305 |
15.40 |
| 2026-10-02 00:00 |
19:58:23.24 |
-42:25:22.5 |
HIP 98305 |
15.61 |
| 2026-10-02 12:00 |
19:58:21.86 |
-42:25:10.0 |
HIP 98305 |
15.83 |
| 2026-10-03 00:00 |
19:58:20.52 |
-42:24:57.5 |
HIP 98305 |
16.05 |
| 2026-10-03 12:00 |
19:58:19.21 |
-42:24:44.8 |
HIP 98305 |
16.28 |
| 2026-10-04 00:00 |
19:58:17.94 |
-42:24:31.9 |
HIP 98305 |
16.52 |
| 2026-10-04 12:00 |
19:58:16.72 |
-42:24:19.0 |
HIP 98305 |
16.75 |
| 2026-10-05 00:00 |
19:58:15.53 |
-42:24:05.9 |
HIP 98305 |
16.99 |
| 2026-10-05 12:00 |
19:58:14.38 |
-42:23:52.7 |
HIP 98305 |
17.24 |
| 2026-10-06 00:00 |
19:58:13.27 |
-42:23:39.4 |
HIP 98305 |
17.49 |
| 2026-10-06 12:00 |
19:58:12.20 |
-42:23:26.0 |
HIP 98305 |
17.73 |
| 2026-10-07 00:00 |
19:58:11.17 |
-42:23:12.4 |
HIP 98305 |
17.99 |
| 2026-10-07 12:00 |
19:58:10.18 |
-42:22:58.8 |
HIP 98305 |
18.24 |
| 2026-10-08 00:00 |
19:58:09.23 |
-42:22:45.0 |
HIP 98305 |
18.50 |
| 2026-10-08 12:00 |
19:58:08.32 |
-42:22:31.1 |
HIP 98305 |
18.75 |
| 2026-10-09 00:00 |
19:58:07.45 |
-42:22:17.1 |
HIP 98305 |
19.01 |
| 2026-10-09 12:00 |
19:58:06.62 |
-42:22:03.0 |
HIP 98305 |
19.27 |
| 2026-10-10 00:00 |
19:58:05.83 |
-42:21:48.8 |
HIP 98305 |
19.53 |
| 2026-10-10 12:00 |
19:58:05.08 |
-42:21:34.5 |
HIP 98305 |
19.79 |
| 2026-10-11 00:00 |
19:58:04.38 |
-42:21:20.0 |
HIP 98305 |
20.05 |