C/2013 F1 (Boattini)
| Parameter |
Value |
| Designation |
C/2013 F1 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-12-02T15:47:47.538240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
274 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-04-14.0000000 |
| e |
1.00279701 |
| q (au) |
1.859992 |
| a (au) |
-664.991992 |
| i (deg) |
79.687882 |
| Ω (om, deg) |
30.122757 |
| ω (w, deg) |
92.003330 |
| M (ma, deg) |
0.007606 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.724 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.724 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.996 |
| 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 |
12:08:33.54 |
-73:00:26.1 |
HIP 59070 |
8.55 |
| 2026-02-03 12:00 |
12:08:24.68 |
-73:01:07.4 |
HIP 59070 |
7.67 |
| 2026-02-04 00:00 |
12:08:15.74 |
-73:01:48.4 |
HIP 59070 |
6.80 |
| 2026-02-04 12:00 |
12:08:06.69 |
-73:02:28.9 |
HIP 59070 |
5.95 |
| 2026-02-05 00:00 |
12:07:57.56 |
-73:03:09.0 |
HIP 59070 |
5.13 |
| 2026-02-05 12:00 |
12:07:48.33 |
-73:03:48.8 |
HIP 59070 |
4.35 |
| 2026-02-06 00:00 |
12:07:39.01 |
-73:04:28.1 |
HIP 59070 |
3.64 |
| 2026-02-06 12:00 |
12:07:29.60 |
-73:05:06.9 |
HIP 59070 |
3.06 |
| 2026-02-07 00:00 |
12:07:20.09 |
-73:05:45.4 |
HIP 59070 |
2.69 |
| 2026-02-07 12:00 |
12:07:10.50 |
-73:06:23.5 |
HIP 59070 |
2.61 |
| 2026-02-08 00:00 |
12:07:00.82 |
-73:07:01.1 |
HIP 59070 |
2.85 |
| 2026-02-08 12:00 |
12:06:51.04 |
-73:07:38.2 |
HIP 59070 |
3.34 |
| 2026-02-09 00:00 |
12:06:41.18 |
-73:08:15.0 |
HIP 59070 |
3.99 |
| 2026-02-09 12:00 |
12:06:31.24 |
-73:08:51.3 |
HIP 59070 |
4.73 |
| 2026-02-10 00:00 |
12:06:21.20 |
-73:09:27.2 |
HIP 59070 |
5.53 |
| 2026-02-10 12:00 |
12:06:11.08 |
-73:10:02.6 |
HIP 59070 |
6.36 |
| 2026-02-11 00:00 |
12:06:00.87 |
-73:10:37.5 |
HIP 59070 |
7.22 |
| 2026-02-11 12:00 |
12:05:50.58 |
-73:11:12.0 |
HIP 59070 |
8.09 |
| 2026-02-12 00:00 |
12:05:40.21 |
-73:11:46.1 |
HIP 59070 |
8.98 |
| 2026-02-12 12:00 |
12:05:29.75 |
-73:12:19.7 |
HIP 59070 |
9.87 |
| 2026-02-13 00:00 |
12:05:19.21 |
-73:12:52.8 |
HIP 59070 |
10.77 |
| 2026-02-13 12:00 |
12:05:08.59 |
-73:13:25.5 |
HIP 59070 |
11.67 |
| 2026-02-14 00:00 |
12:04:57.89 |
-73:13:57.7 |
HIP 59070 |
12.57 |
| 2026-02-14 12:00 |
12:04:47.11 |
-73:14:29.4 |
HIP 58674 |
13.13 |
| 2026-02-15 00:00 |
12:04:36.25 |
-73:15:00.7 |
HIP 58674 |
12.25 |
| 2026-02-15 12:00 |
12:04:25.32 |
-73:15:31.5 |
HIP 58674 |
11.36 |
| 2026-02-16 00:00 |
12:04:14.31 |
-73:16:01.7 |
HIP 58674 |
10.48 |
| 2026-02-16 12:00 |
12:04:03.22 |
-73:16:31.6 |
HIP 58674 |
9.61 |
| 2026-02-17 00:00 |
12:03:52.06 |
-73:17:00.9 |
HIP 58674 |
8.75 |
| 2026-02-17 12:00 |
12:03:40.82 |
-73:17:29.7 |
HIP 58674 |
7.91 |
| 2026-02-18 00:00 |
12:03:29.52 |
-73:17:58.0 |
HIP 58674 |
7.09 |
| 2026-02-18 12:00 |
12:03:18.14 |
-73:18:25.9 |
HIP 58674 |
6.29 |
| 2026-02-19 00:00 |
12:03:06.69 |
-73:18:53.2 |
HIP 58674 |
5.53 |
| 2026-02-19 12:00 |
12:02:55.17 |
-73:19:20.0 |
HIP 58674 |
4.83 |
| 2026-02-20 00:00 |
12:02:43.58 |
-73:19:46.4 |
HIP 58674 |
4.22 |
| 2026-02-20 12:00 |
12:02:31.93 |
-73:20:12.2 |
HIP 58674 |
3.73 |
| 2026-02-21 00:00 |
12:02:20.21 |
-73:20:37.5 |
HIP 58674 |
3.43 |
| 2026-02-21 12:00 |
12:02:08.43 |
-73:21:02.3 |
HIP 58674 |
3.37 |
| 2026-02-22 00:00 |
12:01:56.58 |
-73:21:26.6 |
HIP 58674 |
3.56 |
| 2026-02-22 12:00 |
12:01:44.67 |
-73:21:50.4 |
HIP 58674 |
3.95 |
| 2026-02-23 00:00 |
12:01:32.70 |
-73:22:13.7 |
HIP 58674 |
4.51 |
| 2026-02-23 12:00 |
12:01:20.67 |
-73:22:36.4 |
HIP 58674 |
5.17 |
| 2026-02-24 00:00 |
12:01:08.58 |
-73:22:58.6 |
HIP 58674 |
5.90 |