| 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) |
| 2026-03-26 00:00 |
15:02:52.57 |
-33:01:05.0 |
HIP 73624 |
22.53 |
| 2026-03-26 12:00 |
15:02:45.90 |
-33:01:19.1 |
HIP 73624 |
22.90 |
| 2026-03-27 00:00 |
15:02:39.15 |
-33:01:32.7 |
HIP 73624 |
23.34 |
| 2026-03-27 12:00 |
15:02:32.34 |
-33:01:45.9 |
HIP 73624 |
23.85 |
| 2026-03-28 00:00 |
15:02:25.46 |
-33:01:58.6 |
HIP 73505 |
23.66 |
| 2026-03-28 12:00 |
15:02:18.51 |
-33:02:10.8 |
HIP 73505 |
23.10 |
| 2026-03-29 00:00 |
15:02:11.50 |
-33:02:22.6 |
HIP 73505 |
22.61 |
| 2026-03-29 12:00 |
15:02:04.42 |
-33:02:33.9 |
HIP 73505 |
22.20 |
| 2026-03-30 00:00 |
15:01:57.27 |
-33:02:44.7 |
HIP 73505 |
21.87 |
| 2026-03-30 12:00 |
15:01:50.07 |
-33:02:55.1 |
HIP 73505 |
21.63 |
| 2026-03-31 00:00 |
15:01:42.79 |
-33:03:05.0 |
HIP 73505 |
21.49 |
| 2026-03-31 12:00 |
15:01:35.46 |
-33:03:14.5 |
HIP 73505 |
21.44 |
| 2026-04-01 00:00 |
15:01:28.06 |
-33:03:23.4 |
HIP 73505 |
21.50 |
| 2026-04-01 12:00 |
15:01:20.60 |
-33:03:31.9 |
HIP 73505 |
21.67 |
| 2026-04-02 00:00 |
15:01:13.07 |
-33:03:40.0 |
HIP 73505 |
21.94 |
| 2026-04-02 12:00 |
15:01:05.49 |
-33:03:47.5 |
HIP 73505 |
22.32 |
| 2026-04-03 00:00 |
15:00:57.85 |
-33:03:54.6 |
HIP 73505 |
22.79 |
| 2026-04-03 12:00 |
15:00:50.14 |
-33:04:01.2 |
HIP 73505 |
23.37 |
| 2026-04-04 00:00 |
15:00:42.38 |
-33:04:07.3 |
HIP 73505 |
24.04 |
| 2026-04-04 12:00 |
15:00:34.56 |
-33:04:13.0 |
HIP 73505 |
24.79 |
| 2026-04-05 00:00 |
15:00:26.69 |
-33:04:18.2 |
HIP 73505 |
25.63 |
| 2026-04-05 12:00 |
15:00:18.75 |
-33:04:22.9 |
HIP 73387 |
26.26 |
| 2026-04-06 00:00 |
15:00:10.76 |
-33:04:27.1 |
HIP 73387 |
26.01 |
| 2026-04-06 12:00 |
15:00:02.72 |
-33:04:30.9 |
HIP 73387 |
25.87 |
| 2026-04-07 00:00 |
14:59:54.62 |
-33:04:34.1 |
HIP 73387 |
25.83 |
| 2026-04-07 12:00 |
14:59:46.47 |
-33:04:36.9 |
HIP 73387 |
25.89 |
| 2026-04-08 00:00 |
14:59:38.26 |
-33:04:39.2 |
HIP 73221 |
25.23 |
| 2026-04-08 12:00 |
14:59:30.00 |
-33:04:41.1 |
HIP 73221 |
23.70 |
| 2026-04-09 00:00 |
14:59:21.69 |
-33:04:42.4 |
HIP 73221 |
22.19 |
| 2026-04-09 12:00 |
14:59:13.33 |
-33:04:43.3 |
HIP 73221 |
20.72 |
| 2026-04-10 00:00 |
14:59:04.92 |
-33:04:43.7 |
HIP 73221 |
19.29 |
| 2026-04-10 12:00 |
14:58:56.46 |
-33:04:43.6 |
HIP 73221 |
17.92 |
| 2026-04-11 00:00 |
14:58:47.95 |
-33:04:43.0 |
HIP 73221 |
16.62 |
| 2026-04-11 12:00 |
14:58:39.39 |
-33:04:42.0 |
HIP 73221 |
15.41 |
| 2026-04-12 00:00 |
14:58:30.79 |
-33:04:40.5 |
HIP 73221 |
14.33 |
| 2026-04-12 12:00 |
14:58:22.14 |
-33:04:38.5 |
HIP 73221 |
13.41 |
| 2026-04-13 00:00 |
14:58:13.44 |
-33:04:36.0 |
HIP 73221 |
12.69 |
| 2026-04-13 12:00 |
14:58:04.70 |
-33:04:33.0 |
HIP 73221 |
12.20 |
| 2026-04-14 00:00 |
14:57:55.91 |
-33:04:29.5 |
HIP 73221 |
11.98 |
| 2026-04-14 12:00 |
14:57:47.09 |
-33:04:25.6 |
HIP 73221 |
12.05 |
| 2026-04-15 00:00 |
14:57:38.22 |
-33:04:21.2 |
HIP 73221 |
12.41 |
| 2026-04-15 12:00 |
14:57:29.31 |
-33:04:16.3 |
HIP 73221 |
13.04 |
| 2026-04-16 00:00 |
14:57:20.36 |
-33:04:11.0 |
HIP 73221 |
13.90 |