| Parameter |
Value |
| Designation |
P/2010 JC81 (WISE) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-04-26T13:17:31.525440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
619 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-12-13.0000000 |
| e |
0.77735065 |
| q (au) |
1.810829 |
| a (au) |
8.133096 |
| i (deg) |
38.690269 |
| Ω (om, deg) |
30.768052 |
| ω (w, deg) |
12.573308 |
| M (ma, deg) |
9.792412 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.695 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.695 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
14:33:45.61 |
-31:15:23.6 |
HIP 71167 |
17.87 |
| 2026-07-29 12:00 |
14:33:45.51 |
-31:14:58.2 |
HIP 71167 |
17.46 |
| 2026-07-30 00:00 |
14:33:45.51 |
-31:14:33.1 |
HIP 71167 |
17.07 |
| 2026-07-30 12:00 |
14:33:45.58 |
-31:14:08.4 |
HIP 71167 |
16.68 |
| 2026-07-31 00:00 |
14:33:45.74 |
-31:13:44.1 |
HIP 71167 |
16.31 |
| 2026-07-31 12:00 |
14:33:45.97 |
-31:13:20.1 |
HIP 71167 |
15.95 |
| 2026-08-01 00:00 |
14:33:46.29 |
-31:12:56.4 |
HIP 71167 |
15.61 |
| 2026-08-01 12:00 |
14:33:46.70 |
-31:12:33.1 |
HIP 71167 |
15.28 |
| 2026-08-02 00:00 |
14:33:47.18 |
-31:12:10.1 |
HIP 71167 |
14.96 |
| 2026-08-02 12:00 |
14:33:47.75 |
-31:11:47.4 |
HIP 71167 |
14.66 |
| 2026-08-03 00:00 |
14:33:48.40 |
-31:11:25.2 |
HIP 71167 |
14.38 |
| 2026-08-03 12:00 |
14:33:49.13 |
-31:11:03.2 |
HIP 71167 |
14.12 |
| 2026-08-04 00:00 |
14:33:49.94 |
-31:10:41.7 |
HIP 71167 |
13.88 |
| 2026-08-04 12:00 |
14:33:50.83 |
-31:10:20.4 |
HIP 71167 |
13.66 |
| 2026-08-05 00:00 |
14:33:51.81 |
-31:09:59.6 |
HIP 71167 |
13.46 |
| 2026-08-05 12:00 |
14:33:52.86 |
-31:09:39.1 |
HIP 71167 |
13.28 |
| 2026-08-06 00:00 |
14:33:54.00 |
-31:09:19.0 |
HIP 71167 |
13.13 |
| 2026-08-06 12:00 |
14:33:55.22 |
-31:08:59.2 |
HIP 71167 |
13.01 |
| 2026-08-07 00:00 |
14:33:56.52 |
-31:08:39.8 |
HIP 71167 |
12.91 |
| 2026-08-07 12:00 |
14:33:57.90 |
-31:08:20.8 |
HIP 71167 |
12.84 |
| 2026-08-08 00:00 |
14:33:59.36 |
-31:08:02.1 |
HIP 71167 |
12.81 |
| 2026-08-08 12:00 |
14:34:00.90 |
-31:07:43.9 |
HIP 71167 |
12.80 |
| 2026-08-09 00:00 |
14:34:02.53 |
-31:07:26.0 |
HIP 71167 |
12.83 |
| 2026-08-09 12:00 |
14:34:04.23 |
-31:07:08.4 |
HIP 71167 |
12.89 |
| 2026-08-10 00:00 |
14:34:06.01 |
-31:06:51.3 |
HIP 71167 |
12.99 |
| 2026-08-10 12:00 |
14:34:07.88 |
-31:06:34.5 |
HIP 71167 |
13.11 |
| 2026-08-11 00:00 |
14:34:09.82 |
-31:06:18.2 |
HIP 71167 |
13.28 |
| 2026-08-11 12:00 |
14:34:11.84 |
-31:06:02.2 |
HIP 71167 |
13.47 |
| 2026-08-12 00:00 |
14:34:13.95 |
-31:05:46.6 |
HIP 71167 |
13.70 |
| 2026-08-12 12:00 |
14:34:16.13 |
-31:05:31.4 |
HIP 71167 |
13.97 |
| 2026-08-13 00:00 |
14:34:18.39 |
-31:05:16.5 |
HIP 71167 |
14.27 |
| 2026-08-13 12:00 |
14:34:20.73 |
-31:05:02.1 |
HIP 71167 |
14.60 |
| 2026-08-14 00:00 |
14:34:23.15 |
-31:04:48.1 |
HIP 71167 |
14.96 |
| 2026-08-14 12:00 |
14:34:25.65 |
-31:04:34.4 |
HIP 71167 |
15.35 |
| 2026-08-15 00:00 |
14:34:28.22 |
-31:04:21.2 |
HIP 71167 |
15.77 |
| 2026-08-15 12:00 |
14:34:30.88 |
-31:04:08.3 |
HIP 71167 |
16.22 |
| 2026-08-16 00:00 |
14:34:33.61 |
-31:03:55.8 |
HIP 71167 |
16.70 |
| 2026-08-16 12:00 |
14:34:36.42 |
-31:03:43.8 |
HIP 71167 |
17.21 |
| 2026-08-17 00:00 |
14:34:39.30 |
-31:03:32.1 |
HIP 71167 |
17.74 |
| 2026-08-17 12:00 |
14:34:42.27 |
-31:03:20.9 |
HIP 71167 |
18.29 |
| 2026-08-18 00:00 |
14:34:45.31 |
-31:03:10.0 |
HIP 71167 |
18.87 |
| 2026-08-18 12:00 |
14:34:48.42 |
-31:02:59.5 |
HIP 71167 |
19.48 |
| 2026-08-19 00:00 |
14:34:51.61 |
-31:02:49.5 |
HIP 71167 |
20.11 |