| 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
$$
M_a = (5.795 + 3.046\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.795 |
| n |
3.046 |
| gf |
1.000 |
| gb |
-0.935 |
| 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) |
| 2026-06-01 00:00 |
17:12:56.31 |
-15:42:09.7 |
HIP 84269 |
12.95 |
| 2026-06-01 12:00 |
17:12:51.32 |
-15:42:05.1 |
HIP 84269 |
13.83 |
| 2026-06-02 00:00 |
17:12:46.32 |
-15:42:00.6 |
HIP 84269 |
14.76 |
| 2026-06-02 12:00 |
17:12:41.32 |
-15:41:56.1 |
HIP 84269 |
15.72 |
| 2026-06-03 00:00 |
17:12:36.31 |
-15:41:51.7 |
HIP 84269 |
16.72 |
| 2026-06-03 12:00 |
17:12:31.30 |
-15:41:47.4 |
HIP 84269 |
17.75 |
| 2026-06-04 00:00 |
17:12:26.28 |
-15:41:43.1 |
HIP 84269 |
18.80 |
| 2026-06-04 12:00 |
17:12:21.26 |
-15:41:38.8 |
HIP 84269 |
19.86 |
| 2026-06-05 00:00 |
17:12:16.24 |
-15:41:34.7 |
HIP 84269 |
20.95 |
| 2026-06-05 12:00 |
17:12:11.22 |
-15:41:30.5 |
HIP 84269 |
22.05 |
| 2026-06-06 00:00 |
17:12:06.19 |
-15:41:26.5 |
HIP 84269 |
23.16 |
| 2026-06-06 12:00 |
17:12:01.16 |
-15:41:22.5 |
HIP 84012 |
23.80 |
| 2026-06-07 00:00 |
17:11:56.12 |
-15:41:18.5 |
HIP 84012 |
22.60 |
| 2026-06-07 12:00 |
17:11:51.09 |
-15:41:14.6 |
HIP 84012 |
21.40 |
| 2026-06-08 00:00 |
17:11:46.06 |
-15:41:10.8 |
HIP 84012 |
20.20 |
| 2026-06-08 12:00 |
17:11:41.02 |
-15:41:07.0 |
HIP 84012 |
19.01 |
| 2026-06-09 00:00 |
17:11:35.98 |
-15:41:03.3 |
HIP 84012 |
17.82 |
| 2026-06-09 12:00 |
17:11:30.95 |
-15:40:59.7 |
HIP 84012 |
16.62 |
| 2026-06-10 00:00 |
17:11:25.91 |
-15:40:56.1 |
HIP 84012 |
15.44 |
| 2026-06-10 12:00 |
17:11:20.87 |
-15:40:52.6 |
HIP 84012 |
14.25 |
| 2026-06-11 00:00 |
17:11:15.84 |
-15:40:49.1 |
HIP 84012 |
13.08 |
| 2026-06-11 12:00 |
17:11:10.80 |
-15:40:45.7 |
HIP 84012 |
11.91 |
| 2026-06-12 00:00 |
17:11:05.77 |
-15:40:42.4 |
HIP 84012 |
10.75 |
| 2026-06-12 12:00 |
17:11:00.74 |
-15:40:39.1 |
HIP 84012 |
9.60 |
| 2026-06-13 00:00 |
17:10:55.71 |
-15:40:35.9 |
HIP 84012 |
8.47 |
| 2026-06-13 12:00 |
17:10:50.69 |
-15:40:32.8 |
HIP 84012 |
7.37 |
| 2026-06-14 00:00 |
17:10:45.67 |
-15:40:29.7 |
HIP 84012 |
6.30 |
| 2026-06-14 12:00 |
17:10:40.65 |
-15:40:26.7 |
HIP 84012 |
5.30 |
| 2026-06-15 00:00 |
17:10:35.63 |
-15:40:23.7 |
HIP 84012 |
4.41 |
| 2026-06-15 12:00 |
17:10:30.62 |
-15:40:20.8 |
HIP 84012 |
3.70 |
| 2026-06-16 00:00 |
17:10:25.62 |
-15:40:18.0 |
HIP 84012 |
3.29 |
| 2026-06-16 12:00 |
17:10:20.62 |
-15:40:15.3 |
HIP 84012 |
3.29 |
| 2026-06-17 00:00 |
17:10:15.62 |
-15:40:12.6 |
HIP 84012 |
3.71 |
| 2026-06-17 12:00 |
17:10:10.63 |
-15:40:10.0 |
HIP 84012 |
4.42 |
| 2026-06-18 00:00 |
17:10:05.65 |
-15:40:07.5 |
HIP 84012 |
5.31 |
| 2026-06-18 12:00 |
17:10:00.67 |
-15:40:05.0 |
HIP 84012 |
6.30 |
| 2026-06-19 00:00 |
17:09:55.70 |
-15:40:02.6 |
HIP 84012 |
7.36 |
| 2026-06-19 12:00 |
17:09:50.74 |
-15:40:00.2 |
HIP 84012 |
8.45 |
| 2026-06-20 00:00 |
17:09:45.78 |
-15:39:58.0 |
HIP 84012 |
9.56 |
| 2026-06-20 12:00 |
17:09:40.83 |
-15:39:55.8 |
HIP 84012 |
10.68 |
| 2026-06-21 00:00 |
17:09:35.89 |
-15:39:53.6 |
HIP 84012 |
11.82 |
| 2026-06-21 12:00 |
17:09:30.96 |
-15:39:51.6 |
HIP 84012 |
12.97 |
| 2026-06-22 00:00 |
17:09:26.04 |
-15:39:49.6 |
HIP 84012 |
14.12 |