C/2008 S3 (Boattini)
| Parameter |
Value |
| Designation |
C/2008 S3 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-06-07T00:27:12.735360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:23Z |
| Obs used |
1909 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
6.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-04-19.0000000 |
| e |
1.00107749 |
| q (au) |
8.017919 |
| a (au) |
-7441.315951 |
| i (deg) |
162.702798 |
| Ω (om, deg) |
54.938054 |
| ω (w, deg) |
39.937767 |
| M (ma, deg) |
-0.000075 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.809 + 3.039\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.809 |
| n |
3.039 |
| gf |
0.995 |
| gb |
-0.936 |
| k |
1.000 |
| δ90 |
9.992 |
| 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 |
17:20:43.53 |
-16:05:08.1 |
HIP 84791 |
16.07 |
| 2026-02-03 12:00 |
17:20:45.56 |
-16:05:06.3 |
HIP 84791 |
16.46 |
| 2026-02-04 00:00 |
17:20:47.55 |
-16:05:04.4 |
HIP 84791 |
16.85 |
| 2026-02-04 12:00 |
17:20:49.52 |
-16:05:02.4 |
HIP 84791 |
17.24 |
| 2026-02-05 00:00 |
17:20:51.45 |
-16:05:00.4 |
HIP 84791 |
17.63 |
| 2026-02-05 12:00 |
17:20:53.35 |
-16:04:58.3 |
HIP 84791 |
18.01 |
| 2026-02-06 00:00 |
17:20:55.23 |
-16:04:56.1 |
HIP 84791 |
18.40 |
| 2026-02-06 12:00 |
17:20:57.07 |
-16:04:53.8 |
HIP 84791 |
18.78 |
| 2026-02-07 00:00 |
17:20:58.88 |
-16:04:51.5 |
HIP 84791 |
19.16 |
| 2026-02-07 12:00 |
17:21:00.66 |
-16:04:49.1 |
HIP 84791 |
19.54 |
| 2026-02-08 00:00 |
17:21:02.41 |
-16:04:46.6 |
HIP 84791 |
19.91 |
| 2026-02-08 12:00 |
17:21:04.12 |
-16:04:44.1 |
HIP 84791 |
20.28 |
| 2026-02-09 00:00 |
17:21:05.81 |
-16:04:41.5 |
HIP 84791 |
20.64 |
| 2026-02-09 12:00 |
17:21:07.46 |
-16:04:38.8 |
HIP 84791 |
21.00 |
| 2026-02-10 00:00 |
17:21:09.08 |
-16:04:36.1 |
HIP 84791 |
21.36 |
| 2026-02-10 12:00 |
17:21:10.67 |
-16:04:33.3 |
HIP 84791 |
21.71 |
| 2026-02-11 00:00 |
17:21:12.23 |
-16:04:30.4 |
HIP 84791 |
22.05 |
| 2026-02-11 12:00 |
17:21:13.75 |
-16:04:27.5 |
HIP 84791 |
22.39 |
| 2026-02-12 00:00 |
17:21:15.24 |
-16:04:24.5 |
HIP 84791 |
22.73 |
| 2026-02-12 12:00 |
17:21:16.70 |
-16:04:21.4 |
HIP 84791 |
23.06 |
| 2026-02-13 00:00 |
17:21:18.12 |
-16:04:18.3 |
HIP 84791 |
23.38 |
| 2026-02-13 12:00 |
17:21:19.51 |
-16:04:15.1 |
HIP 84791 |
23.70 |
| 2026-02-14 00:00 |
17:21:20.87 |
-16:04:11.8 |
HIP 84791 |
24.01 |
| 2026-02-14 12:00 |
17:21:22.19 |
-16:04:08.4 |
HIP 84791 |
24.32 |
| 2026-02-15 00:00 |
17:21:23.48 |
-16:04:05.0 |
HIP 84791 |
24.62 |
| 2026-02-15 12:00 |
17:21:24.74 |
-16:04:01.6 |
HIP 84791 |
24.91 |
| 2026-02-16 00:00 |
17:21:25.96 |
-16:03:58.0 |
HIP 84791 |
25.19 |
| 2026-02-16 12:00 |
17:21:27.14 |
-16:03:54.4 |
HIP 84791 |
25.47 |
| 2026-02-17 00:00 |
17:21:28.29 |
-16:03:50.8 |
HIP 84791 |
25.75 |
| 2026-02-17 12:00 |
17:21:29.41 |
-16:03:47.1 |
HIP 84791 |
26.01 |
| 2026-02-18 00:00 |
17:21:30.49 |
-16:03:43.3 |
HIP 84791 |
26.27 |
| 2026-02-18 12:00 |
17:21:31.53 |
-16:03:39.4 |
HIP 84791 |
26.53 |
| 2026-02-19 00:00 |
17:21:32.54 |
-16:03:35.5 |
HIP 84791 |
26.77 |
| 2026-02-19 12:00 |
17:21:33.52 |
-16:03:31.5 |
HIP 84791 |
27.01 |
| 2026-02-20 00:00 |
17:21:34.46 |
-16:03:27.5 |
HIP 84791 |
27.24 |
| 2026-02-20 12:00 |
17:21:35.36 |
-16:03:23.4 |
HIP 84791 |
27.47 |
| 2026-02-21 00:00 |
17:21:36.23 |
-16:03:19.3 |
HIP 84791 |
27.69 |
| 2026-02-21 12:00 |
17:21:37.06 |
-16:03:15.1 |
HIP 84791 |
27.90 |
| 2026-02-22 00:00 |
17:21:37.86 |
-16:03:10.8 |
HIP 84791 |
28.10 |
| 2026-02-22 12:00 |
17:21:38.62 |
-16:03:06.5 |
HIP 85105 |
28.27 |
| 2026-02-23 00:00 |
17:21:39.34 |
-16:03:02.1 |
HIP 85105 |
28.09 |
| 2026-02-23 12:00 |
17:21:40.03 |
-16:02:57.7 |
HIP 85105 |
27.92 |
| 2026-02-24 00:00 |
17:21:40.68 |
-16:02:53.2 |
HIP 85105 |
27.77 |