451P/Christensen
| Parameter |
Value |
| Designation |
451P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-01-17T03:54:57.801600Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:44:16Z |
| Obs used |
157 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
15.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2006-11-24T10:39:07.776000Z |
| Discovery magnitude (MPC) |
20.10 N |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-01-11.0000000 |
| e |
0.55743773 |
| q (au) |
2.795689 |
| a (au) |
6.317053 |
| i (deg) |
26.493684 |
| Ω (om, deg) |
301.041988 |
| ω (w, deg) |
186.900815 |
| M (ma, deg) |
67.654045 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.305 + 3.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.305 |
| n |
3.229 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:02:13.66 |
-38:22:40.2 |
HIP 88314 |
6.14 |
| 2026-02-03 12:00 |
18:02:32.84 |
-38:22:55.4 |
HIP 88314 |
7.37 |
| 2026-02-04 00:00 |
18:02:51.93 |
-38:23:10.9 |
HIP 88314 |
9.94 |
| 2026-02-04 12:00 |
18:03:10.92 |
-38:23:26.5 |
HIP 88314 |
13.07 |
| 2026-02-05 00:00 |
18:03:29.81 |
-38:23:42.4 |
HIP 88314 |
16.44 |
| 2026-02-05 12:00 |
18:03:48.61 |
-38:23:58.4 |
HIP 88596 |
18.87 |
| 2026-02-06 00:00 |
18:04:07.30 |
-38:24:14.6 |
HIP 88596 |
15.23 |
| 2026-02-06 12:00 |
18:04:25.90 |
-38:24:31.1 |
HIP 88596 |
11.64 |
| 2026-02-07 00:00 |
18:04:44.39 |
-38:24:47.7 |
HIP 88596 |
8.13 |
| 2026-02-07 12:00 |
18:05:02.78 |
-38:25:04.6 |
HIP 88596 |
4.82 |
| 2026-02-08 00:00 |
18:05:21.07 |
-38:25:21.7 |
HIP 88596 |
2.57 |
| 2026-02-08 12:00 |
18:05:39.26 |
-38:25:38.9 |
HIP 88596 |
3.96 |
| 2026-02-09 00:00 |
18:05:57.34 |
-38:25:56.4 |
HIP 88596 |
7.08 |
| 2026-02-09 12:00 |
18:06:15.32 |
-38:26:14.1 |
HIP 88596 |
10.46 |
| 2026-02-10 00:00 |
18:06:33.19 |
-38:26:32.0 |
HIP 88596 |
13.89 |
| 2026-02-10 12:00 |
18:06:50.95 |
-38:26:50.1 |
HIP 88824 |
14.29 |
| 2026-02-11 00:00 |
18:07:08.61 |
-38:27:08.5 |
HIP 88824 |
11.23 |
| 2026-02-11 12:00 |
18:07:26.15 |
-38:27:27.0 |
HIP 88824 |
8.51 |
| 2026-02-12 00:00 |
18:07:43.59 |
-38:27:45.7 |
HIP 88824 |
6.51 |
| 2026-02-12 12:00 |
18:08:00.92 |
-38:28:04.7 |
HIP 88824 |
5.98 |
| 2026-02-13 00:00 |
18:08:18.13 |
-38:28:23.9 |
HIP 88824 |
7.22 |
| 2026-02-13 12:00 |
18:08:35.23 |
-38:28:43.3 |
HIP 88824 |
9.54 |
| 2026-02-14 00:00 |
18:08:52.22 |
-38:29:02.9 |
HIP 88941 |
9.05 |
| 2026-02-14 12:00 |
18:09:09.10 |
-38:29:22.7 |
HIP 88941 |
7.46 |
| 2026-02-15 00:00 |
18:09:25.86 |
-38:29:42.7 |
HIP 88941 |
7.16 |
| 2026-02-15 12:00 |
18:09:42.50 |
-38:30:03.0 |
HIP 88941 |
8.26 |
| 2026-02-16 00:00 |
18:09:59.03 |
-38:30:23.5 |
HIP 88941 |
10.31 |
| 2026-02-16 12:00 |
18:10:15.44 |
-38:30:44.1 |
HIP 88941 |
12.84 |
| 2026-02-17 00:00 |
18:10:31.73 |
-38:31:05.1 |
HIP 88941 |
15.60 |
| 2026-02-17 12:00 |
18:10:47.90 |
-38:31:26.2 |
HIP 88941 |
18.49 |
| 2026-02-18 00:00 |
18:11:03.95 |
-38:31:47.5 |
HIP 89131 |
20.43 |
| 2026-02-18 12:00 |
18:11:19.87 |
-38:32:09.1 |
HIP 89131 |
20.40 |
| 2026-02-19 00:00 |
18:11:35.68 |
-38:32:30.9 |
HIP 89131 |
20.85 |
| 2026-02-19 12:00 |
18:11:51.36 |
-38:32:52.9 |
HIP 89131 |
21.74 |
| 2026-02-20 00:00 |
18:12:06.92 |
-38:33:15.1 |
HIP 89201 |
22.20 |
| 2026-02-20 12:00 |
18:12:22.36 |
-38:33:37.5 |
HIP 89361 |
22.32 |
| 2026-02-21 00:00 |
18:12:37.67 |
-38:34:00.2 |
HIP 89361 |
19.79 |
| 2026-02-21 12:00 |
18:12:52.85 |
-38:34:23.0 |
HIP 89361 |
17.43 |
| 2026-02-22 00:00 |
18:13:07.90 |
-38:34:46.1 |
HIP 89361 |
15.32 |
| 2026-02-22 12:00 |
18:13:22.83 |
-38:35:09.4 |
HIP 89361 |
13.55 |
| 2026-02-23 00:00 |
18:13:37.63 |
-38:35:33.0 |
HIP 89361 |
12.26 |
| 2026-02-23 12:00 |
18:13:52.30 |
-38:35:56.7 |
HIP 89361 |
11.59 |
| 2026-02-24 00:00 |
18:14:06.84 |
-38:36:20.7 |
HIP 89361 |
11.63 |