| 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) |
| 2026-03-26 00:00 |
07:33:08.32 |
+15:39:45.9 |
HIP 36739 |
4.18 |
| 2026-03-26 12:00 |
07:33:07.95 |
+15:39:49.0 |
HIP 36739 |
4.28 |
| 2026-03-27 00:00 |
07:33:07.77 |
+15:39:51.8 |
HIP 36739 |
4.33 |
| 2026-03-27 12:00 |
07:33:07.78 |
+15:39:54.3 |
HIP 36739 |
4.35 |
| 2026-03-28 00:00 |
07:33:07.97 |
+15:39:56.4 |
HIP 36739 |
4.32 |
| 2026-03-28 12:00 |
07:33:08.34 |
+15:39:58.2 |
HIP 36739 |
4.24 |
| 2026-03-29 00:00 |
07:33:08.89 |
+15:39:59.6 |
HIP 36739 |
4.13 |
| 2026-03-29 12:00 |
07:33:09.63 |
+15:40:00.6 |
HIP 36739 |
3.98 |
| 2026-03-30 00:00 |
07:33:10.55 |
+15:40:01.3 |
HIP 36739 |
3.78 |
| 2026-03-30 12:00 |
07:33:11.65 |
+15:40:01.6 |
HIP 36739 |
3.55 |
| 2026-03-31 00:00 |
07:33:12.93 |
+15:40:01.6 |
HIP 36739 |
3.28 |
| 2026-03-31 12:00 |
07:33:14.39 |
+15:40:01.2 |
HIP 36739 |
2.98 |
| 2026-04-01 00:00 |
07:33:16.03 |
+15:40:00.4 |
HIP 36739 |
2.65 |
| 2026-04-01 12:00 |
07:33:17.84 |
+15:39:59.3 |
HIP 36739 |
2.32 |
| 2026-04-02 00:00 |
07:33:19.84 |
+15:39:57.8 |
HIP 36739 |
1.99 |
| 2026-04-02 12:00 |
07:33:22.01 |
+15:39:56.0 |
HIP 36739 |
1.71 |
| 2026-04-03 00:00 |
07:33:24.36 |
+15:39:53.8 |
HIP 36739 |
1.55 |
| 2026-04-03 12:00 |
07:33:26.89 |
+15:39:51.2 |
HIP 36739 |
1.60 |
| 2026-04-04 00:00 |
07:33:29.59 |
+15:39:48.2 |
HIP 36739 |
1.88 |
| 2026-04-04 12:00 |
07:33:32.47 |
+15:39:44.9 |
HIP 36739 |
2.35 |
| 2026-04-05 00:00 |
07:33:35.52 |
+15:39:41.2 |
HIP 36739 |
2.94 |
| 2026-04-05 12:00 |
07:33:38.74 |
+15:39:37.1 |
HIP 36739 |
3.62 |
| 2026-04-06 00:00 |
07:33:42.14 |
+15:39:32.6 |
HIP 36739 |
4.38 |
| 2026-04-06 12:00 |
07:33:45.71 |
+15:39:27.8 |
HIP 36739 |
5.19 |
| 2026-04-07 00:00 |
07:33:49.45 |
+15:39:22.6 |
HIP 36739 |
6.06 |
| 2026-04-07 12:00 |
07:33:53.37 |
+15:39:17.0 |
HIP 36739 |
6.98 |
| 2026-04-08 00:00 |
07:33:57.45 |
+15:39:11.0 |
HIP 36739 |
7.94 |
| 2026-04-08 12:00 |
07:34:01.71 |
+15:39:04.7 |
HIP 36739 |
8.95 |
| 2026-04-09 00:00 |
07:34:06.13 |
+15:38:57.9 |
HIP 36739 |
10.01 |
| 2026-04-09 12:00 |
07:34:10.73 |
+15:38:50.8 |
HIP 36739 |
11.11 |
| 2026-04-10 00:00 |
07:34:15.49 |
+15:38:43.3 |
HIP 36739 |
12.25 |
| 2026-04-10 12:00 |
07:34:20.42 |
+15:38:35.3 |
HIP 36739 |
13.43 |
| 2026-04-11 00:00 |
07:34:25.52 |
+15:38:27.0 |
HIP 36739 |
14.66 |
| 2026-04-11 12:00 |
07:34:30.78 |
+15:38:18.3 |
HIP 36739 |
15.92 |
| 2026-04-12 00:00 |
07:34:36.21 |
+15:38:09.2 |
HIP 36739 |
17.23 |
| 2026-04-12 12:00 |
07:34:41.80 |
+15:37:59.7 |
HIP 36739 |
18.58 |
| 2026-04-13 00:00 |
07:34:47.56 |
+15:37:49.8 |
HIP 36739 |
19.97 |
| 2026-04-13 12:00 |
07:34:53.48 |
+15:37:39.5 |
HIP 36739 |
21.40 |
| 2026-04-14 00:00 |
07:34:59.57 |
+15:37:28.8 |
HIP 36739 |
22.87 |
| 2026-04-14 12:00 |
07:35:05.82 |
+15:37:17.7 |
HIP 36739 |
24.38 |
| 2026-04-15 00:00 |
07:35:12.23 |
+15:37:06.2 |
HIP 36739 |
25.93 |
| 2026-04-15 12:00 |
07:35:18.80 |
+15:36:54.3 |
HIP 36739 |
27.52 |
| 2026-04-16 00:00 |
07:35:25.53 |
+15:36:42.0 |
HIP 36739 |
29.15 |