| Parameter |
Value |
| Designation |
P/2008 O3 (Boattini) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-06-03T01:59:52.333440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:21Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
28.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-08-28.0000000 |
| e |
0.69495599 |
| q (au) |
2.497269 |
| a (au) |
8.186587 |
| i (deg) |
32.269872 |
| Ω (om, deg) |
47.572666 |
| ω (w, deg) |
340.983593 |
| M (ma, deg) |
3.615161 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.607 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.607 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.664 |
| k |
0.800 |
| δ90 |
9.998 |
| 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) |
| 2026-09-20 00:00 |
15:13:32.18 |
-23:41:36.8 |
HIP 74529 |
9.71 |
| 2026-09-20 12:00 |
15:13:40.17 |
-23:42:10.9 |
HIP 74529 |
9.83 |
| 2026-09-21 00:00 |
15:13:48.23 |
-23:42:45.3 |
HIP 74529 |
10.32 |
| 2026-09-21 12:00 |
15:13:56.36 |
-23:43:20.0 |
HIP 74529 |
11.13 |
| 2026-09-22 00:00 |
15:14:04.56 |
-23:43:55.0 |
HIP 74529 |
12.22 |
| 2026-09-22 12:00 |
15:14:12.83 |
-23:44:30.2 |
HIP 74529 |
13.52 |
| 2026-09-23 00:00 |
15:14:21.16 |
-23:45:05.8 |
HIP 74529 |
14.98 |
| 2026-09-23 12:00 |
15:14:29.56 |
-23:45:41.7 |
HIP 74529 |
16.57 |
| 2026-09-24 00:00 |
15:14:38.03 |
-23:46:17.9 |
HIP 74529 |
18.25 |
| 2026-09-24 12:00 |
15:14:46.57 |
-23:46:54.4 |
HIP 74529 |
20.01 |
| 2026-09-25 00:00 |
15:14:55.17 |
-23:47:31.1 |
HIP 74529 |
21.84 |
| 2026-09-25 12:00 |
15:15:03.83 |
-23:48:08.2 |
HIP 74529 |
23.72 |
| 2026-09-26 00:00 |
15:15:12.56 |
-23:48:45.5 |
HIP 74529 |
25.64 |
| 2026-09-26 12:00 |
15:15:21.35 |
-23:49:23.1 |
HIP 74529 |
27.61 |
| 2026-09-27 00:00 |
15:15:30.21 |
-23:50:01.0 |
HIP 74529 |
29.61 |
| 2026-09-27 12:00 |
15:15:39.13 |
-23:50:39.2 |
HIP 74529 |
31.63 |
| 2026-09-28 00:00 |
15:15:48.11 |
-23:51:17.7 |
HIP 74529 |
33.69 |
| 2026-09-28 12:00 |
15:15:57.16 |
-23:51:56.5 |
HIP 74529 |
35.77 |
| 2026-09-29 00:00 |
15:16:06.27 |
-23:52:35.5 |
HIP 74870 |
36.05 |
| 2026-09-29 12:00 |
15:16:15.44 |
-23:53:14.8 |
HIP 74870 |
34.99 |
| 2026-09-30 00:00 |
15:16:24.67 |
-23:53:54.4 |
HIP 74870 |
34.03 |
| 2026-09-30 12:00 |
15:16:33.96 |
-23:54:34.2 |
HIP 74870 |
33.19 |
| 2026-10-01 00:00 |
15:16:43.31 |
-23:55:14.4 |
HIP 74920 |
32.38 |
| 2026-10-01 12:00 |
15:16:52.73 |
-23:55:54.8 |
HIP 74920 |
30.28 |
| 2026-10-02 00:00 |
15:17:02.20 |
-23:56:35.5 |
HIP 74920 |
28.18 |
| 2026-10-02 12:00 |
15:17:11.73 |
-23:57:16.4 |
HIP 74920 |
26.10 |
| 2026-10-03 00:00 |
15:17:21.32 |
-23:57:57.6 |
HIP 74920 |
24.05 |
| 2026-10-03 12:00 |
15:17:30.97 |
-23:58:39.1 |
HIP 74920 |
22.02 |
| 2026-10-04 00:00 |
15:17:40.68 |
-23:59:20.8 |
HIP 74920 |
20.05 |
| 2026-10-04 12:00 |
15:17:50.44 |
-24:00:02.8 |
HIP 74920 |
18.16 |
| 2026-10-05 00:00 |
15:18:00.26 |
-24:00:45.1 |
HIP 74920 |
16.36 |
| 2026-10-05 12:00 |
15:18:10.14 |
-24:01:27.6 |
HIP 74920 |
14.71 |
| 2026-10-06 00:00 |
15:18:20.07 |
-24:02:10.3 |
HIP 74920 |
13.28 |
| 2026-10-06 12:00 |
15:18:30.06 |
-24:02:53.4 |
HIP 74920 |
12.14 |
| 2026-10-07 00:00 |
15:18:40.11 |
-24:03:36.6 |
HIP 74920 |
11.38 |
| 2026-10-07 12:00 |
15:18:50.21 |
-24:04:20.2 |
HIP 74920 |
11.11 |
| 2026-10-08 00:00 |
15:19:00.36 |
-24:05:04.0 |
HIP 74920 |
11.35 |
| 2026-10-08 12:00 |
15:19:10.57 |
-24:05:48.0 |
HIP 74920 |
12.10 |
| 2026-10-09 00:00 |
15:19:20.83 |
-24:06:32.2 |
HIP 75012 |
10.64 |
| 2026-10-09 12:00 |
15:19:31.14 |
-24:07:16.8 |
HIP 75012 |
9.16 |
| 2026-10-10 00:00 |
15:19:41.51 |
-24:08:01.5 |
HIP 75012 |
8.17 |
| 2026-10-10 12:00 |
15:19:51.92 |
-24:08:46.5 |
HIP 75012 |
7.87 |
| 2026-10-11 00:00 |
15:20:02.39 |
-24:09:31.7 |
HIP 75012 |
8.34 |