| Parameter |
Value |
| Designation |
P/2009 B1 (Boattini) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-02-06T04:48:47.580480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:28Z |
| Obs used |
111 |
| NEO |
- |
| M1 |
13.200 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-01-31.0000000 |
| e |
0.63719062 |
| q (au) |
2.426592 |
| a (au) |
6.688339 |
| i (deg) |
22.228478 |
| Ω (om, deg) |
297.438307 |
| ω (w, deg) |
128.593842 |
| M (ma, deg) |
359.646689 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.340 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.340 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.902 |
| δ90 |
1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
03:46:47.15 |
+33:59:11.7 |
HIP 17622 |
7.94 |
| 2026-06-01 12:00 |
03:48:00.56 |
+34:01:23.8 |
HIP 17815 |
19.39 |
| 2026-06-02 00:00 |
03:49:14.01 |
+34:03:34.0 |
HIP 17969 |
15.76 |
| 2026-06-02 12:00 |
03:50:27.51 |
+34:05:42.3 |
HIP 17969 |
2.62 |
| 2026-06-03 00:00 |
03:51:41.05 |
+34:07:48.8 |
HIP 18111 |
9.59 |
| 2026-06-03 12:00 |
03:52:54.62 |
+34:09:53.4 |
HIP 18111 |
8.14 |
| 2026-06-04 00:00 |
03:54:08.24 |
+34:11:56.1 |
HIP 18111 |
22.64 |
| 2026-06-04 12:00 |
03:55:21.90 |
+34:13:56.9 |
HIP 18394 |
8.35 |
| 2026-06-05 00:00 |
03:56:35.59 |
+34:15:55.8 |
HIP 18458 |
6.66 |
| 2026-06-05 12:00 |
03:57:49.32 |
+34:17:52.8 |
HIP 18458 |
16.91 |
| 2026-06-06 00:00 |
03:59:03.08 |
+34:19:47.8 |
HIP 18708 |
17.42 |
| 2026-06-06 12:00 |
04:00:16.88 |
+34:21:41.0 |
HIP 18708 |
2.12 |
| 2026-06-07 00:00 |
04:01:30.71 |
+34:23:32.2 |
HIP 18708 |
13.28 |
| 2026-06-07 12:00 |
04:02:44.58 |
+34:25:21.4 |
HIP 18895 |
12.71 |
| 2026-06-08 00:00 |
04:03:58.47 |
+34:27:08.8 |
HIP 18895 |
15.55 |
| 2026-06-08 12:00 |
04:05:12.39 |
+34:28:54.1 |
HIP 19089 |
15.34 |
| 2026-06-09 00:00 |
04:06:26.33 |
+34:30:37.5 |
HIP 19089 |
19.30 |
| 2026-06-09 12:00 |
04:07:40.31 |
+34:32:19.0 |
HIP 19132 |
29.32 |
| 2026-06-10 00:00 |
04:08:54.31 |
+34:33:58.4 |
HIP 19364 |
35.23 |
| 2026-06-10 12:00 |
04:10:08.33 |
+34:35:35.9 |
HIP 19573 |
21.97 |
| 2026-06-11 00:00 |
04:11:22.37 |
+34:37:11.4 |
HIP 19573 |
13.69 |
| 2026-06-11 12:00 |
04:12:36.43 |
+34:38:44.9 |
HIP 19573 |
19.02 |
| 2026-06-12 00:00 |
04:13:50.51 |
+34:40:16.5 |
HIP 19903 |
31.12 |
| 2026-06-12 12:00 |
04:15:04.60 |
+34:41:46.0 |
HIP 19903 |
17.06 |
| 2026-06-13 00:00 |
04:16:18.72 |
+34:43:13.5 |
HIP 19903 |
9.06 |
| 2026-06-13 12:00 |
04:17:32.84 |
+34:44:39.0 |
HIP 20013 |
12.09 |
| 2026-06-14 00:00 |
04:18:46.98 |
+34:46:02.5 |
HIP 20013 |
18.77 |
| 2026-06-14 12:00 |
04:20:01.12 |
+34:47:23.9 |
HIP 20252 |
14.24 |
| 2026-06-15 00:00 |
04:21:15.28 |
+34:48:43.3 |
HIP 20340 |
14.65 |
| 2026-06-15 12:00 |
04:22:29.44 |
+34:50:00.7 |
HIP 20340 |
20.34 |
| 2026-06-16 00:00 |
04:23:43.60 |
+34:51:16.0 |
HIP 20534 |
21.94 |
| 2026-06-16 12:00 |
04:24:57.77 |
+34:52:29.3 |
HIP 20709 |
18.49 |
| 2026-06-17 00:00 |
04:26:11.94 |
+34:53:40.6 |
HIP 20709 |
10.73 |
| 2026-06-17 12:00 |
04:27:26.11 |
+34:54:49.8 |
HIP 20851 |
10.19 |
| 2026-06-18 00:00 |
04:28:40.27 |
+34:55:56.9 |
HIP 20851 |
8.99 |
| 2026-06-18 12:00 |
04:29:54.44 |
+34:57:02.0 |
HIP 20926 |
20.79 |
| 2026-06-19 00:00 |
04:31:08.59 |
+34:58:05.0 |
HIP 20926 |
29.74 |
| 2026-06-19 12:00 |
04:32:22.74 |
+34:59:05.9 |
HIP 21291 |
23.69 |
| 2026-06-20 00:00 |
04:33:36.88 |
+35:00:04.8 |
HIP 21291 |
13.36 |
| 2026-06-20 12:00 |
04:34:51.01 |
+35:01:01.5 |
HIP 21291 |
16.08 |
| 2026-06-21 00:00 |
04:36:05.13 |
+35:01:56.2 |
HIP 21491 |
11.55 |
| 2026-06-21 12:00 |
04:37:19.24 |
+35:02:48.8 |
HIP 21491 |
7.38 |
| 2026-06-22 00:00 |
04:38:33.33 |
+35:03:39.4 |
HIP 21491 |
20.90 |