286P/Christensen
| 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) |
| 2026-02-03 00:00 |
07:49:19.79 |
+15:11:53.7 |
HIP 38218 |
8.46 |
| 2026-02-03 12:00 |
07:49:02.90 |
+15:12:16.9 |
HIP 38218 |
12.04 |
| 2026-02-04 00:00 |
07:48:46.10 |
+15:12:40.2 |
HIP 38218 |
15.85 |
| 2026-02-04 12:00 |
07:48:29.39 |
+15:13:03.5 |
HIP 38218 |
19.74 |
| 2026-02-05 00:00 |
07:48:12.78 |
+15:13:26.7 |
HIP 38005 |
21.54 |
| 2026-02-05 12:00 |
07:47:56.26 |
+15:13:50.0 |
HIP 38005 |
19.22 |
| 2026-02-06 00:00 |
07:47:39.84 |
+15:14:13.3 |
HIP 38005 |
17.53 |
| 2026-02-06 12:00 |
07:47:23.51 |
+15:14:36.6 |
HIP 38005 |
16.64 |
| 2026-02-07 00:00 |
07:47:07.29 |
+15:14:59.9 |
HIP 38005 |
16.66 |
| 2026-02-07 12:00 |
07:46:51.18 |
+15:15:23.1 |
HIP 38005 |
17.57 |
| 2026-02-08 00:00 |
07:46:35.17 |
+15:15:46.4 |
HIP 38005 |
19.22 |
| 2026-02-08 12:00 |
07:46:19.27 |
+15:16:09.6 |
HIP 38005 |
21.44 |
| 2026-02-09 00:00 |
07:46:03.48 |
+15:16:32.7 |
HIP 38005 |
24.06 |
| 2026-02-09 12:00 |
07:45:47.80 |
+15:16:55.8 |
HIP 38005 |
26.94 |
| 2026-02-10 00:00 |
07:45:32.24 |
+15:17:18.9 |
HIP 37685 |
23.89 |
| 2026-02-10 12:00 |
07:45:16.80 |
+15:17:42.0 |
HIP 37685 |
20.21 |
| 2026-02-11 00:00 |
07:45:01.48 |
+15:18:04.9 |
HIP 37685 |
16.60 |
| 2026-02-11 12:00 |
07:44:46.28 |
+15:18:27.9 |
HIP 37685 |
13.08 |
| 2026-02-12 00:00 |
07:44:31.20 |
+15:18:50.7 |
HIP 37685 |
9.70 |
| 2026-02-12 12:00 |
07:44:16.25 |
+15:19:13.5 |
HIP 37685 |
6.65 |
| 2026-02-13 00:00 |
07:44:01.43 |
+15:19:36.2 |
HIP 37685 |
4.56 |
| 2026-02-13 12:00 |
07:43:46.74 |
+15:19:58.8 |
HIP 37685 |
4.80 |
| 2026-02-14 00:00 |
07:43:32.18 |
+15:20:21.4 |
HIP 37685 |
7.10 |
| 2026-02-14 12:00 |
07:43:17.76 |
+15:20:43.8 |
HIP 37685 |
10.10 |
| 2026-02-15 00:00 |
07:43:03.47 |
+15:21:06.2 |
HIP 37685 |
13.32 |
| 2026-02-15 12:00 |
07:42:49.32 |
+15:21:28.4 |
HIP 37685 |
16.60 |
| 2026-02-16 00:00 |
07:42:35.31 |
+15:21:50.6 |
HIP 37499 |
17.51 |
| 2026-02-16 12:00 |
07:42:21.45 |
+15:22:12.6 |
HIP 37499 |
15.19 |
| 2026-02-17 00:00 |
07:42:07.72 |
+15:22:34.5 |
HIP 37499 |
13.34 |
| 2026-02-17 12:00 |
07:41:54.15 |
+15:22:56.3 |
HIP 37499 |
12.14 |
| 2026-02-18 00:00 |
07:41:40.72 |
+15:23:18.0 |
HIP 37499 |
11.77 |
| 2026-02-18 12:00 |
07:41:27.44 |
+15:23:39.5 |
HIP 37499 |
12.26 |
| 2026-02-19 00:00 |
07:41:14.31 |
+15:24:00.9 |
HIP 37499 |
13.51 |
| 2026-02-19 12:00 |
07:41:01.33 |
+15:24:22.2 |
HIP 37499 |
15.30 |
| 2026-02-20 00:00 |
07:40:48.51 |
+15:24:43.3 |
HIP 37499 |
17.45 |
| 2026-02-20 12:00 |
07:40:35.84 |
+15:25:04.2 |
HIP 37499 |
19.83 |
| 2026-02-21 00:00 |
07:40:23.33 |
+15:25:25.0 |
HIP 37499 |
22.34 |
| 2026-02-21 12:00 |
07:40:10.98 |
+15:25:45.7 |
HIP 37499 |
24.93 |
| 2026-02-22 00:00 |
07:39:58.79 |
+15:26:06.2 |
HIP 37499 |
27.57 |
| 2026-02-22 12:00 |
07:39:46.76 |
+15:26:26.5 |
HIP 37499 |
30.23 |
| 2026-02-23 00:00 |
07:39:34.90 |
+15:26:46.6 |
HIP 37499 |
32.90 |
| 2026-02-23 12:00 |
07:39:23.19 |
+15:27:06.6 |
HIP 37499 |
35.56 |
| 2026-02-24 00:00 |
07:39:11.66 |
+15:27:26.3 |
HIP 37499 |
38.21 |