| Parameter |
Value |
| Designation |
286P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-05-13T11:04:06.790080Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:22Z |
| Obs used |
470 |
| NEO |
- |
| M1 |
16.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-04-23.0000000 |
| e |
0.42417674 |
| q (au) |
2.369655 |
| a (au) |
4.115246 |
| i (deg) |
17.038782 |
| Ω (om, deg) |
283.947999 |
| ω (w, deg) |
24.688564 |
| M (ma, deg) |
185.095652 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.621 + 2.108\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.621 |
| n |
2.108 |
| gf |
1.000 |
| gb |
-0.682 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
09:10:27.36 |
+08:46:27.5 |
HIP 45093 |
10.37 |
| 2026-09-20 12:00 |
09:10:45.04 |
+08:44:22.0 |
HIP 45093 |
5.65 |
| 2026-09-21 00:00 |
09:11:02.64 |
+08:42:16.4 |
HIP 45093 |
1.80 |
| 2026-09-21 12:00 |
09:11:20.16 |
+08:40:10.9 |
HIP 45093 |
4.58 |
| 2026-09-22 00:00 |
09:11:37.61 |
+08:38:05.3 |
HIP 45093 |
9.21 |
| 2026-09-22 12:00 |
09:11:54.99 |
+08:35:59.7 |
HIP 45093 |
13.93 |
| 2026-09-23 00:00 |
09:12:12.29 |
+08:33:54.0 |
HIP 45093 |
18.67 |
| 2026-09-23 12:00 |
09:12:29.52 |
+08:31:48.4 |
HIP 45234 |
19.92 |
| 2026-09-24 00:00 |
09:12:46.66 |
+08:29:42.7 |
HIP 45234 |
16.32 |
| 2026-09-24 12:00 |
09:13:03.73 |
+08:27:37.1 |
HIP 45234 |
13.43 |
| 2026-09-25 00:00 |
09:13:20.72 |
+08:25:31.4 |
HIP 45234 |
11.78 |
| 2026-09-25 12:00 |
09:13:37.63 |
+08:23:25.8 |
HIP 45234 |
11.87 |
| 2026-09-26 00:00 |
09:13:54.46 |
+08:21:20.1 |
HIP 45234 |
13.66 |
| 2026-09-26 12:00 |
09:14:11.21 |
+08:19:14.5 |
HIP 45234 |
16.58 |
| 2026-09-27 00:00 |
09:14:27.88 |
+08:17:08.9 |
HIP 45234 |
20.14 |
| 2026-09-27 12:00 |
09:14:44.47 |
+08:15:03.3 |
HIP 45234 |
24.04 |
| 2026-09-28 00:00 |
09:15:00.98 |
+08:12:57.7 |
HIP 45234 |
28.14 |
| 2026-09-28 12:00 |
09:15:17.40 |
+08:10:52.1 |
HIP 45234 |
32.35 |
| 2026-09-29 00:00 |
09:15:33.74 |
+08:08:46.6 |
HIP 45589 |
32.06 |
| 2026-09-29 12:00 |
09:15:49.99 |
+08:06:41.1 |
HIP 45589 |
29.55 |
| 2026-09-30 00:00 |
09:16:06.16 |
+08:04:35.7 |
HIP 45613 |
27.07 |
| 2026-09-30 12:00 |
09:16:22.24 |
+08:02:30.2 |
HIP 45613 |
22.67 |
| 2026-10-01 00:00 |
09:16:38.24 |
+08:00:24.9 |
HIP 45613 |
18.34 |
| 2026-10-01 12:00 |
09:16:54.14 |
+07:58:19.6 |
HIP 45613 |
14.12 |
| 2026-10-02 00:00 |
09:17:09.96 |
+07:56:14.3 |
HIP 45613 |
10.14 |
| 2026-10-02 12:00 |
09:17:25.69 |
+07:54:09.1 |
HIP 45613 |
6.75 |
| 2026-10-03 00:00 |
09:17:41.33 |
+07:52:04.0 |
HIP 45613 |
5.26 |
| 2026-10-03 12:00 |
09:17:56.88 |
+07:49:58.9 |
HIP 45613 |
6.95 |
| 2026-10-04 00:00 |
09:18:12.34 |
+07:47:53.9 |
HIP 45613 |
10.34 |
| 2026-10-04 12:00 |
09:18:27.70 |
+07:45:49.0 |
HIP 45613 |
14.25 |
| 2026-10-05 00:00 |
09:18:42.98 |
+07:43:44.1 |
HIP 45613 |
18.34 |
| 2026-10-05 12:00 |
09:18:58.15 |
+07:41:39.4 |
HIP 45613 |
22.50 |
| 2026-10-06 00:00 |
09:19:13.23 |
+07:39:34.8 |
HIP 45613 |
26.68 |
| 2026-10-06 12:00 |
09:19:28.22 |
+07:37:30.2 |
HIP 45613 |
30.87 |
| 2026-10-07 00:00 |
09:19:43.11 |
+07:35:25.8 |
HIP 45613 |
35.05 |
| 2026-10-07 12:00 |
09:19:57.90 |
+07:33:21.5 |
HIP 45772 |
37.55 |
| 2026-10-08 00:00 |
09:20:12.59 |
+07:31:17.3 |
HIP 45653 |
38.59 |
| 2026-10-08 12:00 |
09:20:27.19 |
+07:29:13.2 |
HIP 45653 |
39.95 |
| 2026-10-09 00:00 |
09:20:41.68 |
+07:27:09.2 |
HIP 45901 |
38.90 |
| 2026-10-09 12:00 |
09:20:56.07 |
+07:25:05.4 |
HIP 45901 |
35.95 |
| 2026-10-10 00:00 |
09:21:10.36 |
+07:23:01.7 |
HIP 45901 |
33.26 |
| 2026-10-10 12:00 |
09:21:24.55 |
+07:20:58.2 |
HIP 45901 |
30.88 |
| 2026-10-11 00:00 |
09:21:38.63 |
+07:18:54.8 |
HIP 45901 |
28.89 |