| Parameter |
Value |
| Designation |
383P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-08-30T06:26:21.379200Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:12:28Z |
| Obs used |
349 |
| NEO |
- |
| M1 |
18.600 |
| K1 |
7.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-06-25T21:31:28.704000Z |
| Discovery magnitude (MPC) |
19.90 T |
| Discovery observatory (MPC) |
461 · University of Szeged, Piszkéstető Stn. (Konkoly) |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-03-04.0000000 |
| e |
0.61146880 |
| q (au) |
1.358800 |
| a (au) |
3.497274 |
| i (deg) |
11.867886 |
| Ω (om, deg) |
213.631703 |
| ω (w, deg) |
128.065705 |
| M (ma, deg) |
83.145252 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.746 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.746 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.911 |
| k |
0.993 |
| 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) |
| 2026-07-29 00:00 |
02:41:18.78 |
+22:41:11.9 |
HIP 12556 |
26.66 |
| 2026-07-29 12:00 |
02:42:42.65 |
+22:43:11.6 |
HIP 12665 |
20.20 |
| 2026-07-30 00:00 |
02:44:06.22 |
+22:45:06.6 |
HIP 12665 |
26.36 |
| 2026-07-30 12:00 |
02:45:29.50 |
+22:46:56.9 |
HIP 12998 |
25.15 |
| 2026-07-31 00:00 |
02:46:52.47 |
+22:48:42.6 |
HIP 13012 |
10.36 |
| 2026-07-31 12:00 |
02:48:15.15 |
+22:50:23.7 |
HIP 13111 |
15.32 |
| 2026-08-01 00:00 |
02:49:37.51 |
+22:52:00.1 |
HIP 13111 |
21.20 |
| 2026-08-01 12:00 |
02:50:59.56 |
+22:53:31.9 |
HIP 13362 |
19.91 |
| 2026-08-02 00:00 |
02:52:21.29 |
+22:54:59.0 |
HIP 13362 |
15.03 |
| 2026-08-02 12:00 |
02:53:42.70 |
+22:56:21.5 |
HIP 13430 |
24.52 |
| 2026-08-03 00:00 |
02:55:03.79 |
+22:57:39.4 |
HIP 13627 |
6.34 |
| 2026-08-03 12:00 |
02:56:24.54 |
+22:58:52.7 |
HIP 13627 |
12.77 |
| 2026-08-04 00:00 |
02:57:44.95 |
+23:00:01.5 |
HIP 13627 |
31.22 |
| 2026-08-04 12:00 |
02:59:05.03 |
+23:01:05.6 |
HIP 14024 |
23.90 |
| 2026-08-05 00:00 |
03:00:24.75 |
+23:02:05.2 |
HIP 14024 |
12.63 |
| 2026-08-05 12:00 |
03:01:44.13 |
+23:03:00.1 |
HIP 14024 |
20.47 |
| 2026-08-06 00:00 |
03:03:03.15 |
+23:03:50.6 |
HIP 14230 |
5.85 |
| 2026-08-06 12:00 |
03:04:21.81 |
+23:04:36.5 |
HIP 14230 |
12.28 |
| 2026-08-07 00:00 |
03:05:40.10 |
+23:05:17.8 |
HIP 14394 |
0.41 |
| 2026-08-07 12:00 |
03:06:58.02 |
+23:05:54.6 |
HIP 14394 |
17.71 |
| 2026-08-08 00:00 |
03:08:15.57 |
+23:06:27.0 |
HIP 14572 |
26.92 |
| 2026-08-08 12:00 |
03:09:32.73 |
+23:06:54.8 |
HIP 14572 |
33.52 |
| 2026-08-09 00:00 |
03:10:49.51 |
+23:07:18.1 |
HIP 14908 |
26.26 |
| 2026-08-09 12:00 |
03:12:05.90 |
+23:07:36.9 |
HIP 14908 |
15.41 |
| 2026-08-10 00:00 |
03:13:21.89 |
+23:07:51.3 |
HIP 15072 |
16.56 |
| 2026-08-10 12:00 |
03:14:37.49 |
+23:08:01.2 |
HIP 15072 |
11.77 |
| 2026-08-11 00:00 |
03:15:52.67 |
+23:08:06.7 |
HIP 15267 |
14.79 |
| 2026-08-11 12:00 |
03:17:07.45 |
+23:08:07.7 |
HIP 15267 |
2.46 |
| 2026-08-12 00:00 |
03:18:21.81 |
+23:08:04.4 |
HIP 15267 |
19.51 |
| 2026-08-12 12:00 |
03:19:35.75 |
+23:07:56.6 |
HIP 15586 |
16.38 |
| 2026-08-13 00:00 |
03:20:49.27 |
+23:07:44.5 |
HIP 15586 |
3.40 |
| 2026-08-13 12:00 |
03:22:02.37 |
+23:07:28.0 |
HIP 15640 |
11.66 |
| 2026-08-14 00:00 |
03:23:15.03 |
+23:07:07.2 |
HIP 15723 |
21.05 |
| 2026-08-14 12:00 |
03:24:27.25 |
+23:06:42.0 |
HIP 15723 |
32.19 |
| 2026-08-15 00:00 |
03:25:39.03 |
+23:06:12.6 |
HIP 16119 |
30.32 |
| 2026-08-15 12:00 |
03:26:50.37 |
+23:05:38.9 |
HIP 16119 |
16.31 |
| 2026-08-16 00:00 |
03:28:01.27 |
+23:05:00.9 |
HIP 16119 |
12.22 |
| 2026-08-16 12:00 |
03:29:11.71 |
+23:04:18.6 |
HIP 16181 |
19.12 |
| 2026-08-17 00:00 |
03:30:21.69 |
+23:03:32.2 |
HIP 16181 |
30.59 |
| 2026-08-17 12:00 |
03:31:31.21 |
+23:02:41.5 |
HIP 16428 |
32.34 |
| 2026-08-18 00:00 |
03:32:40.27 |
+23:01:46.7 |
HIP 16659 |
24.09 |
| 2026-08-18 12:00 |
03:33:48.87 |
+23:00:47.7 |
HIP 16659 |
10.93 |
| 2026-08-19 00:00 |
03:34:56.99 |
+22:59:44.5 |
HIP 16659 |
12.55 |