C/2007 B2 (Skiff)
| Parameter |
Value |
| Designation |
C/2007 B2 (Skiff) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-08-20T20:11:20.682240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:03Z |
| Obs used |
1527 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
7.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-03-08.0000000 |
| e |
0.99596321 |
| q (au) |
2.974916 |
| a (au) |
736.951176 |
| i (deg) |
27.495297 |
| Ω (om, deg) |
14.868892 |
| ω (w, deg) |
205.997314 |
| M (ma, deg) |
359.991830 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.353 + 2.105\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.353 |
| n |
2.105 |
| gf |
1.000 |
| gb |
-0.636 |
| k |
0.800 |
| 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 |
00:30:42.96 |
-00:19:02.4 |
HIP 2333 |
13.01 |
| 2026-02-03 12:00 |
00:30:44.92 |
-00:18:45.5 |
HIP 2333 |
13.51 |
| 2026-02-04 00:00 |
00:30:46.90 |
-00:18:28.5 |
HIP 2333 |
14.01 |
| 2026-02-04 12:00 |
00:30:48.90 |
-00:18:11.3 |
HIP 2333 |
14.53 |
| 2026-02-05 00:00 |
00:30:50.92 |
-00:17:54.0 |
HIP 2333 |
15.06 |
| 2026-02-05 12:00 |
00:30:52.96 |
-00:17:36.7 |
HIP 2333 |
15.59 |
| 2026-02-06 00:00 |
00:30:55.02 |
-00:17:19.2 |
HIP 2333 |
16.14 |
| 2026-02-06 12:00 |
00:30:57.10 |
-00:17:01.6 |
HIP 2333 |
16.69 |
| 2026-02-07 00:00 |
00:30:59.20 |
-00:16:43.9 |
HIP 2333 |
17.25 |
| 2026-02-07 12:00 |
00:31:01.32 |
-00:16:26.0 |
HIP 2333 |
17.82 |
| 2026-02-08 00:00 |
00:31:03.45 |
-00:16:08.1 |
HIP 2333 |
18.40 |
| 2026-02-08 12:00 |
00:31:05.61 |
-00:15:50.1 |
HIP 2333 |
18.98 |
| 2026-02-09 00:00 |
00:31:07.79 |
-00:15:31.9 |
HIP 2333 |
19.57 |
| 2026-02-09 12:00 |
00:31:09.99 |
-00:15:13.7 |
HIP 2333 |
20.17 |
| 2026-02-10 00:00 |
00:31:12.21 |
-00:14:55.3 |
HIP 2333 |
20.77 |
| 2026-02-10 12:00 |
00:31:14.44 |
-00:14:36.9 |
HIP 2333 |
21.39 |
| 2026-02-11 00:00 |
00:31:16.70 |
-00:14:18.3 |
HIP 2333 |
22.00 |
| 2026-02-11 12:00 |
00:31:18.97 |
-00:13:59.7 |
HIP 2333 |
22.63 |
| 2026-02-12 00:00 |
00:31:21.27 |
-00:13:40.9 |
HIP 2333 |
23.26 |
| 2026-02-12 12:00 |
00:31:23.58 |
-00:13:22.1 |
HIP 2333 |
23.90 |
| 2026-02-13 00:00 |
00:31:25.91 |
-00:13:03.2 |
HIP 2333 |
24.54 |
| 2026-02-13 12:00 |
00:31:28.25 |
-00:12:44.1 |
HIP 2585 |
24.68 |
| 2026-02-14 00:00 |
00:31:30.62 |
-00:12:25.0 |
HIP 2585 |
24.38 |
| 2026-02-14 12:00 |
00:31:33.00 |
-00:12:05.8 |
HIP 2585 |
24.09 |
| 2026-02-15 00:00 |
00:31:35.40 |
-00:11:46.5 |
HIP 2585 |
23.82 |
| 2026-02-15 12:00 |
00:31:37.82 |
-00:11:27.1 |
HIP 2585 |
23.56 |
| 2026-02-16 00:00 |
00:31:40.25 |
-00:11:07.6 |
HIP 2585 |
23.32 |
| 2026-02-16 12:00 |
00:31:42.70 |
-00:10:48.0 |
HIP 2585 |
23.09 |
| 2026-02-17 00:00 |
00:31:45.17 |
-00:10:28.4 |
HIP 2585 |
22.88 |
| 2026-02-17 12:00 |
00:31:47.65 |
-00:10:08.6 |
HIP 2585 |
22.69 |
| 2026-02-18 00:00 |
00:31:50.15 |
-00:09:48.8 |
HIP 2585 |
22.51 |
| 2026-02-18 12:00 |
00:31:52.67 |
-00:09:28.9 |
HIP 2585 |
22.36 |
| 2026-02-19 00:00 |
00:31:55.20 |
-00:09:08.9 |
HIP 2585 |
22.22 |
| 2026-02-19 12:00 |
00:31:57.75 |
-00:08:48.9 |
HIP 2585 |
22.11 |
| 2026-02-20 00:00 |
00:32:00.32 |
-00:08:28.7 |
HIP 2585 |
22.02 |
| 2026-02-20 12:00 |
00:32:02.90 |
-00:08:08.5 |
HIP 2585 |
21.95 |
| 2026-02-21 00:00 |
00:32:05.49 |
-00:07:48.2 |
HIP 2585 |
21.90 |
| 2026-02-21 12:00 |
00:32:08.10 |
-00:07:27.9 |
HIP 2585 |
21.88 |
| 2026-02-22 00:00 |
00:32:10.73 |
-00:07:07.4 |
HIP 2585 |
21.88 |
| 2026-02-22 12:00 |
00:32:13.37 |
-00:06:46.9 |
HIP 2585 |
21.91 |
| 2026-02-23 00:00 |
00:32:16.02 |
-00:06:26.4 |
HIP 2585 |
21.96 |
| 2026-02-23 12:00 |
00:32:18.69 |
-00:06:05.7 |
HIP 2585 |
22.04 |
| 2026-02-24 00:00 |
00:32:21.37 |
-00:05:45.0 |
HIP 2585 |
22.14 |