| 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) |
| 2026-09-20 00:00 |
04:28:28.30 |
+19:45:36.2 |
HIP 20890 |
2.38 |
| 2026-09-20 12:00 |
04:28:58.00 |
+19:40:51.6 |
HIP 20890 |
6.08 |
| 2026-09-21 00:00 |
04:29:27.00 |
+19:36:04.3 |
HIP 20890 |
14.42 |
| 2026-09-21 12:00 |
04:29:55.31 |
+19:31:14.5 |
HIP 21008 |
19.92 |
| 2026-09-22 00:00 |
04:30:22.93 |
+19:26:22.1 |
HIP 21008 |
24.10 |
| 2026-09-22 12:00 |
04:30:49.85 |
+19:21:27.2 |
HIP 21008 |
29.94 |
| 2026-09-23 00:00 |
04:31:16.07 |
+19:16:29.8 |
HIP 21089 |
27.31 |
| 2026-09-23 12:00 |
04:31:41.59 |
+19:11:30.0 |
HIP 21089 |
23.47 |
| 2026-09-24 00:00 |
04:32:06.42 |
+19:06:27.7 |
HIP 21089 |
21.74 |
| 2026-09-24 12:00 |
04:32:30.54 |
+19:01:23.0 |
HIP 21261 |
16.87 |
| 2026-09-25 00:00 |
04:32:53.95 |
+18:56:15.9 |
HIP 21261 |
12.22 |
| 2026-09-25 12:00 |
04:33:16.66 |
+18:51:06.4 |
HIP 21261 |
11.42 |
| 2026-09-26 00:00 |
04:33:38.67 |
+18:45:54.6 |
HIP 21261 |
14.96 |
| 2026-09-26 12:00 |
04:33:59.97 |
+18:40:40.5 |
HIP 21350 |
20.20 |
| 2026-09-27 00:00 |
04:34:20.55 |
+18:35:24.2 |
HIP 21350 |
13.06 |
| 2026-09-27 12:00 |
04:34:40.43 |
+18:30:05.5 |
HIP 21350 |
6.04 |
| 2026-09-28 00:00 |
04:34:59.59 |
+18:24:44.7 |
HIP 21350 |
1.63 |
| 2026-09-28 12:00 |
04:35:18.04 |
+18:19:21.7 |
HIP 21350 |
8.11 |
| 2026-09-29 00:00 |
04:35:35.78 |
+18:13:56.5 |
HIP 21350 |
14.91 |
| 2026-09-29 12:00 |
04:35:52.80 |
+18:08:29.2 |
HIP 21350 |
21.67 |
| 2026-09-30 00:00 |
04:36:09.10 |
+18:02:59.8 |
HIP 21332 |
27.48 |
| 2026-09-30 12:00 |
04:36:24.68 |
+17:57:28.3 |
HIP 21332 |
27.45 |
| 2026-10-01 00:00 |
04:36:39.54 |
+17:51:54.8 |
HIP 21332 |
28.81 |
| 2026-10-01 12:00 |
04:36:53.68 |
+17:46:19.2 |
HIP 21332 |
31.34 |
| 2026-10-02 00:00 |
04:37:07.10 |
+17:40:41.7 |
HIP 21630 |
27.31 |
| 2026-10-02 12:00 |
04:37:19.79 |
+17:35:02.3 |
HIP 21630 |
21.69 |
| 2026-10-03 00:00 |
04:37:31.76 |
+17:29:20.9 |
HIP 21630 |
16.82 |
| 2026-10-03 12:00 |
04:37:43.01 |
+17:23:37.7 |
HIP 21630 |
13.45 |
| 2026-10-04 00:00 |
04:37:53.53 |
+17:17:52.6 |
HIP 21630 |
12.76 |
| 2026-10-04 12:00 |
04:38:03.33 |
+17:12:05.8 |
HIP 21630 |
15.07 |
| 2026-10-05 00:00 |
04:38:12.40 |
+17:06:17.2 |
HIP 21630 |
19.30 |
| 2026-10-05 12:00 |
04:38:20.74 |
+17:00:26.8 |
HIP 21630 |
24.44 |
| 2026-10-06 00:00 |
04:38:28.36 |
+16:54:34.8 |
HIP 21630 |
30.02 |
| 2026-10-06 12:00 |
04:38:35.26 |
+16:48:41.1 |
HIP 21762 |
31.86 |
| 2026-10-07 00:00 |
04:38:41.43 |
+16:42:45.8 |
HIP 21762 |
27.62 |
| 2026-10-07 12:00 |
04:38:46.88 |
+16:36:49.0 |
HIP 21751 |
24.28 |
| 2026-10-08 00:00 |
04:38:51.61 |
+16:30:50.6 |
HIP 21751 |
20.64 |
| 2026-10-08 12:00 |
04:38:55.61 |
+16:24:50.8 |
HIP 21751 |
18.51 |
| 2026-10-09 00:00 |
04:38:58.91 |
+16:18:49.6 |
HIP 21751 |
18.42 |
| 2026-10-09 12:00 |
04:39:01.48 |
+16:12:46.9 |
HIP 21588 |
16.52 |
| 2026-10-10 00:00 |
04:39:03.34 |
+16:06:43.0 |
HIP 21683 |
12.05 |
| 2026-10-10 12:00 |
04:39:04.49 |
+16:00:37.7 |
HIP 21683 |
6.25 |
| 2026-10-11 00:00 |
04:39:04.94 |
+15:54:31.3 |
HIP 21683 |
2.82 |