| 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) |
| 2026-03-26 00:00 |
00:20:58.74 |
+01:23:11.2 |
HIP 1601 |
19.28 |
| 2026-03-26 12:00 |
00:21:04.35 |
+01:23:51.6 |
HIP 1596 |
20.13 |
| 2026-03-27 00:00 |
00:21:09.96 |
+01:24:32.0 |
HIP 1596 |
20.98 |
| 2026-03-27 12:00 |
00:21:15.56 |
+01:25:12.4 |
HIP 1596 |
21.90 |
| 2026-03-28 00:00 |
00:21:21.17 |
+01:25:52.8 |
HIP 1596 |
22.88 |
| 2026-03-28 12:00 |
00:21:26.78 |
+01:26:33.1 |
HIP 1596 |
23.93 |
| 2026-03-29 00:00 |
00:21:32.38 |
+01:27:13.5 |
HIP 1596 |
25.03 |
| 2026-03-29 12:00 |
00:21:37.99 |
+01:27:53.8 |
HIP 1596 |
26.18 |
| 2026-03-30 00:00 |
00:21:43.59 |
+01:28:34.1 |
HIP 1783 |
25.26 |
| 2026-03-30 12:00 |
00:21:49.19 |
+01:29:14.3 |
HIP 1783 |
23.93 |
| 2026-03-31 00:00 |
00:21:54.78 |
+01:29:54.5 |
HIP 1783 |
22.63 |
| 2026-03-31 12:00 |
00:22:00.38 |
+01:30:34.7 |
HIP 1783 |
21.36 |
| 2026-04-01 00:00 |
00:22:05.97 |
+01:31:14.9 |
HIP 1783 |
20.13 |
| 2026-04-01 12:00 |
00:22:11.55 |
+01:31:55.0 |
HIP 1783 |
18.95 |
| 2026-04-02 00:00 |
00:22:17.14 |
+01:32:35.1 |
HIP 1783 |
17.83 |
| 2026-04-02 12:00 |
00:22:22.71 |
+01:33:15.2 |
HIP 1783 |
16.77 |
| 2026-04-03 00:00 |
00:22:28.29 |
+01:33:55.2 |
HIP 1783 |
15.80 |
| 2026-04-03 12:00 |
00:22:33.86 |
+01:34:35.2 |
HIP 1783 |
14.92 |
| 2026-04-04 00:00 |
00:22:39.42 |
+01:35:15.1 |
HIP 1783 |
14.16 |
| 2026-04-04 12:00 |
00:22:44.98 |
+01:35:55.0 |
HIP 1783 |
13.54 |
| 2026-04-05 00:00 |
00:22:50.54 |
+01:36:34.8 |
HIP 1783 |
13.06 |
| 2026-04-05 12:00 |
00:22:56.09 |
+01:37:14.6 |
HIP 1783 |
12.76 |
| 2026-04-06 00:00 |
00:23:01.63 |
+01:37:54.4 |
HIP 1783 |
12.63 |
| 2026-04-06 12:00 |
00:23:07.17 |
+01:38:34.0 |
HIP 1783 |
12.70 |
| 2026-04-07 00:00 |
00:23:12.70 |
+01:39:13.7 |
HIP 1783 |
12.94 |
| 2026-04-07 12:00 |
00:23:18.22 |
+01:39:53.3 |
HIP 1783 |
13.36 |
| 2026-04-08 00:00 |
00:23:23.73 |
+01:40:32.8 |
HIP 1783 |
13.93 |
| 2026-04-08 12:00 |
00:23:29.24 |
+01:41:12.2 |
HIP 1924 |
14.33 |
| 2026-04-09 00:00 |
00:23:34.74 |
+01:41:51.6 |
HIP 1924 |
13.60 |
| 2026-04-09 12:00 |
00:23:40.23 |
+01:42:31.0 |
HIP 1924 |
13.01 |
| 2026-04-10 00:00 |
00:23:45.71 |
+01:43:10.2 |
HIP 1924 |
12.58 |
| 2026-04-10 12:00 |
00:23:51.19 |
+01:43:49.4 |
HIP 1924 |
12.31 |
| 2026-04-11 00:00 |
00:23:56.65 |
+01:44:28.6 |
HIP 1924 |
12.23 |
| 2026-04-11 12:00 |
00:24:02.11 |
+01:45:07.6 |
HIP 1924 |
12.34 |
| 2026-04-12 00:00 |
00:24:07.55 |
+01:45:46.6 |
HIP 1924 |
12.63 |
| 2026-04-12 12:00 |
00:24:12.99 |
+01:46:25.5 |
HIP 1924 |
13.09 |
| 2026-04-13 00:00 |
00:24:18.41 |
+01:47:04.3 |
HIP 1924 |
13.69 |
| 2026-04-13 12:00 |
00:24:23.83 |
+01:47:43.1 |
HIP 1924 |
14.43 |
| 2026-04-14 00:00 |
00:24:29.23 |
+01:48:21.8 |
HIP 1924 |
15.27 |
| 2026-04-14 12:00 |
00:24:34.62 |
+01:49:00.3 |
HIP 2006 |
14.42 |
| 2026-04-15 00:00 |
00:24:40.00 |
+01:49:38.8 |
HIP 2006 |
12.94 |
| 2026-04-15 12:00 |
00:24:45.37 |
+01:50:17.2 |
HIP 2006 |
11.46 |
| 2026-04-16 00:00 |
00:24:50.72 |
+01:50:55.6 |
HIP 2006 |
9.99 |