| Parameter |
Value |
| Designation |
C/2006 F2 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-03-30T10:14:20.296320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-03-31.0000000 |
| e |
0.65137027 |
| q (au) |
4.296452 |
| a (au) |
12.323827 |
| i (deg) |
20.511217 |
| Ω (om, deg) |
8.260719 |
| ω (w, deg) |
181.011341 |
| M (ma, deg) |
0.013062 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.117 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.117 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.982 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
00:29:04.68 |
+02:21:17.2 |
HIP 2331 |
13.51 |
| 2026-05-12 12:00 |
00:29:08.97 |
+02:21:48.2 |
HIP 2331 |
12.33 |
| 2026-05-13 00:00 |
00:29:13.22 |
+02:22:19.0 |
HIP 2331 |
11.17 |
| 2026-05-13 12:00 |
00:29:17.45 |
+02:22:49.6 |
HIP 2331 |
10.02 |
| 2026-05-14 00:00 |
00:29:21.65 |
+02:23:20.0 |
HIP 2331 |
8.88 |
| 2026-05-14 12:00 |
00:29:25.82 |
+02:23:50.2 |
HIP 2331 |
7.76 |
| 2026-05-15 00:00 |
00:29:29.97 |
+02:24:20.2 |
HIP 2331 |
6.66 |
| 2026-05-15 12:00 |
00:29:34.08 |
+02:24:50.1 |
HIP 2331 |
5.58 |
| 2026-05-16 00:00 |
00:29:38.17 |
+02:25:19.7 |
HIP 2331 |
4.55 |
| 2026-05-16 12:00 |
00:29:42.22 |
+02:25:49.2 |
HIP 2331 |
3.58 |
| 2026-05-17 00:00 |
00:29:46.25 |
+02:26:18.4 |
HIP 2331 |
2.73 |
| 2026-05-17 12:00 |
00:29:50.25 |
+02:26:47.5 |
HIP 2331 |
2.16 |
| 2026-05-18 00:00 |
00:29:54.21 |
+02:27:16.3 |
HIP 2331 |
2.07 |
| 2026-05-18 12:00 |
00:29:58.15 |
+02:27:45.0 |
HIP 2331 |
2.52 |
| 2026-05-19 00:00 |
00:30:02.05 |
+02:28:13.4 |
HIP 2331 |
3.28 |
| 2026-05-19 12:00 |
00:30:05.93 |
+02:28:41.7 |
HIP 2331 |
4.17 |
| 2026-05-20 00:00 |
00:30:09.77 |
+02:29:09.7 |
HIP 2331 |
5.13 |
| 2026-05-20 12:00 |
00:30:13.58 |
+02:29:37.5 |
HIP 2331 |
6.12 |
| 2026-05-21 00:00 |
00:30:17.36 |
+02:30:05.2 |
HIP 2331 |
7.12 |
| 2026-05-21 12:00 |
00:30:21.11 |
+02:30:32.6 |
HIP 2331 |
8.12 |
| 2026-05-22 00:00 |
00:30:24.83 |
+02:30:59.8 |
HIP 2331 |
9.12 |
| 2026-05-22 12:00 |
00:30:28.51 |
+02:31:26.8 |
HIP 2331 |
10.12 |
| 2026-05-23 00:00 |
00:30:32.16 |
+02:31:53.5 |
HIP 2331 |
11.12 |
| 2026-05-23 12:00 |
00:30:35.78 |
+02:32:20.1 |
HIP 2331 |
12.11 |
| 2026-05-24 00:00 |
00:30:39.37 |
+02:32:46.5 |
HIP 2331 |
13.09 |
| 2026-05-24 12:00 |
00:30:42.92 |
+02:33:12.6 |
HIP 2331 |
14.07 |
| 2026-05-25 00:00 |
00:30:46.44 |
+02:33:38.5 |
HIP 2331 |
15.04 |
| 2026-05-25 12:00 |
00:30:49.93 |
+02:34:04.2 |
HIP 2331 |
16.00 |
| 2026-05-26 00:00 |
00:30:53.38 |
+02:34:29.7 |
HIP 2331 |
16.95 |
| 2026-05-26 12:00 |
00:30:56.80 |
+02:34:54.9 |
HIP 2331 |
17.90 |
| 2026-05-27 00:00 |
00:31:00.18 |
+02:35:19.9 |
HIP 2331 |
18.84 |
| 2026-05-27 12:00 |
00:31:03.53 |
+02:35:44.8 |
HIP 2331 |
19.76 |
| 2026-05-28 00:00 |
00:31:06.85 |
+02:36:09.3 |
HIP 2331 |
20.68 |
| 2026-05-28 12:00 |
00:31:10.13 |
+02:36:33.7 |
HIP 2331 |
21.59 |
| 2026-05-29 00:00 |
00:31:13.38 |
+02:36:57.8 |
HIP 2331 |
22.49 |
| 2026-05-29 12:00 |
00:31:16.59 |
+02:37:21.7 |
HIP 2331 |
23.39 |
| 2026-05-30 00:00 |
00:31:19.77 |
+02:37:45.4 |
HIP 2331 |
24.27 |
| 2026-05-30 12:00 |
00:31:22.91 |
+02:38:08.9 |
HIP 2331 |
25.14 |
| 2026-05-31 00:00 |
00:31:26.02 |
+02:38:32.1 |
HIP 2331 |
26.00 |
| 2026-05-31 12:00 |
00:31:29.09 |
+02:38:55.1 |
HIP 2331 |
26.86 |
| 2026-06-01 00:00 |
00:31:32.12 |
+02:39:17.8 |
HIP 2331 |
27.70 |
| 2026-06-01 12:00 |
00:31:35.12 |
+02:39:40.3 |
HIP 2331 |
28.54 |
| 2026-06-02 00:00 |
00:31:38.08 |
+02:40:02.6 |
HIP 2331 |
29.36 |