| 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 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
11:32:50.48 |
-70:32:07.4 |
HIP 56379 |
20.65 |
| 2026-07-29 12:00 |
11:32:57.37 |
-70:31:35.2 |
HIP 56379 |
20.04 |
| 2026-07-30 00:00 |
11:33:04.31 |
-70:31:03.3 |
HIP 56379 |
19.45 |
| 2026-07-30 12:00 |
11:33:11.31 |
-70:30:31.8 |
HIP 56379 |
18.88 |
| 2026-07-31 00:00 |
11:33:18.37 |
-70:30:00.6 |
HIP 56379 |
18.33 |
| 2026-07-31 12:00 |
11:33:25.48 |
-70:29:29.8 |
HIP 56379 |
17.81 |
| 2026-08-01 00:00 |
11:33:32.64 |
-70:28:59.4 |
HIP 56379 |
17.31 |
| 2026-08-01 12:00 |
11:33:39.86 |
-70:28:29.3 |
HIP 56379 |
16.84 |
| 2026-08-02 00:00 |
11:33:47.13 |
-70:27:59.6 |
HIP 56379 |
16.41 |
| 2026-08-02 12:00 |
11:33:54.46 |
-70:27:30.2 |
HIP 56379 |
16.00 |
| 2026-08-03 00:00 |
11:34:01.83 |
-70:27:01.3 |
HIP 56379 |
15.64 |
| 2026-08-03 12:00 |
11:34:09.26 |
-70:26:32.7 |
HIP 56379 |
15.31 |
| 2026-08-04 00:00 |
11:34:16.74 |
-70:26:04.4 |
HIP 56379 |
15.02 |
| 2026-08-04 12:00 |
11:34:24.26 |
-70:25:36.6 |
HIP 56552 |
14.74 |
| 2026-08-05 00:00 |
11:34:31.84 |
-70:25:09.1 |
HIP 56552 |
14.05 |
| 2026-08-05 12:00 |
11:34:39.47 |
-70:24:42.0 |
HIP 56552 |
13.38 |
| 2026-08-06 00:00 |
11:34:47.15 |
-70:24:15.3 |
HIP 56552 |
12.72 |
| 2026-08-06 12:00 |
11:34:54.87 |
-70:23:48.9 |
HIP 56552 |
12.08 |
| 2026-08-07 00:00 |
11:35:02.65 |
-70:23:23.0 |
HIP 56552 |
11.46 |
| 2026-08-07 12:00 |
11:35:10.47 |
-70:22:57.4 |
HIP 56552 |
10.87 |
| 2026-08-08 00:00 |
11:35:18.34 |
-70:22:32.2 |
HIP 56552 |
10.31 |
| 2026-08-08 12:00 |
11:35:26.26 |
-70:22:07.4 |
HIP 56552 |
9.79 |
| 2026-08-09 00:00 |
11:35:34.22 |
-70:21:43.0 |
HIP 56552 |
9.31 |
| 2026-08-09 12:00 |
11:35:42.23 |
-70:21:19.0 |
HIP 56552 |
8.88 |
| 2026-08-10 00:00 |
11:35:50.28 |
-70:20:55.4 |
HIP 56552 |
8.51 |
| 2026-08-10 12:00 |
11:35:58.38 |
-70:20:32.1 |
HIP 56552 |
8.21 |
| 2026-08-11 00:00 |
11:36:06.52 |
-70:20:09.3 |
HIP 56552 |
7.98 |
| 2026-08-11 12:00 |
11:36:14.71 |
-70:19:46.9 |
HIP 56552 |
7.83 |
| 2026-08-12 00:00 |
11:36:22.93 |
-70:19:24.9 |
HIP 56552 |
7.76 |
| 2026-08-12 12:00 |
11:36:31.20 |
-70:19:03.2 |
HIP 56552 |
7.78 |
| 2026-08-13 00:00 |
11:36:39.52 |
-70:18:42.0 |
HIP 56552 |
7.89 |
| 2026-08-13 12:00 |
11:36:47.87 |
-70:18:21.2 |
HIP 56552 |
8.08 |
| 2026-08-14 00:00 |
11:36:56.27 |
-70:18:00.8 |
HIP 56552 |
8.34 |
| 2026-08-14 12:00 |
11:37:04.70 |
-70:17:40.8 |
HIP 56552 |
8.68 |
| 2026-08-15 00:00 |
11:37:13.17 |
-70:17:21.2 |
HIP 56552 |
9.08 |
| 2026-08-15 12:00 |
11:37:21.69 |
-70:17:02.0 |
HIP 56552 |
9.54 |
| 2026-08-16 00:00 |
11:37:30.24 |
-70:16:43.3 |
HIP 56552 |
10.04 |
| 2026-08-16 12:00 |
11:37:38.83 |
-70:16:24.9 |
HIP 56552 |
10.58 |
| 2026-08-17 00:00 |
11:37:47.45 |
-70:16:07.0 |
HIP 56552 |
11.16 |
| 2026-08-17 12:00 |
11:37:56.11 |
-70:15:49.4 |
HIP 56552 |
11.77 |
| 2026-08-18 00:00 |
11:38:04.81 |
-70:15:32.3 |
HIP 56552 |
12.40 |
| 2026-08-18 12:00 |
11:38:13.55 |
-70:15:15.6 |
HIP 56552 |
13.05 |
| 2026-08-19 00:00 |
11:38:22.32 |
-70:14:59.3 |
HIP 56552 |
13.73 |