| 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) |
| 2026-07-29 00:00 |
06:07:29.23 |
+34:29:55.0 |
HIP 29008 |
19.27 |
| 2026-07-29 12:00 |
06:08:37.86 |
+34:28:12.8 |
HIP 29072 |
20.19 |
| 2026-07-30 00:00 |
06:09:46.36 |
+34:26:28.8 |
HIP 29308 |
16.20 |
| 2026-07-30 12:00 |
06:10:54.73 |
+34:24:43.0 |
HIP 29308 |
9.32 |
| 2026-07-31 00:00 |
06:12:02.97 |
+34:22:55.3 |
HIP 29308 |
17.74 |
| 2026-07-31 12:00 |
06:13:11.07 |
+34:21:05.8 |
HIP 29308 |
30.73 |
| 2026-08-01 00:00 |
06:14:19.04 |
+34:19:14.5 |
HIP 29835 |
32.76 |
| 2026-08-01 12:00 |
06:15:26.88 |
+34:17:21.4 |
HIP 29835 |
18.62 |
| 2026-08-02 00:00 |
06:16:34.58 |
+34:15:26.5 |
HIP 29835 |
4.52 |
| 2026-08-02 12:00 |
06:17:42.14 |
+34:13:29.8 |
HIP 29835 |
9.60 |
| 2026-08-03 00:00 |
06:18:49.56 |
+34:11:31.3 |
HIP 30013 |
3.06 |
| 2026-08-03 12:00 |
06:19:56.84 |
+34:09:31.1 |
HIP 30013 |
12.67 |
| 2026-08-04 00:00 |
06:21:03.98 |
+34:07:29.1 |
HIP 30226 |
11.38 |
| 2026-08-04 12:00 |
06:22:10.98 |
+34:05:25.3 |
HIP 30226 |
10.86 |
| 2026-08-05 00:00 |
06:23:17.84 |
+34:03:19.8 |
HIP 30403 |
13.02 |
| 2026-08-05 12:00 |
06:24:24.54 |
+34:01:12.6 |
HIP 30403 |
18.05 |
| 2026-08-06 00:00 |
06:25:31.11 |
+33:59:03.7 |
HIP 30403 |
29.53 |
| 2026-08-06 12:00 |
06:26:37.52 |
+33:56:53.0 |
HIP 30928 |
39.22 |
| 2026-08-07 00:00 |
06:27:43.78 |
+33:54:40.7 |
HIP 30928 |
29.02 |
| 2026-08-07 12:00 |
06:28:49.89 |
+33:52:26.6 |
HIP 30982 |
16.73 |
| 2026-08-08 00:00 |
06:29:55.85 |
+33:50:10.9 |
HIP 30982 |
6.26 |
| 2026-08-08 12:00 |
06:31:01.66 |
+33:47:53.5 |
HIP 30982 |
13.54 |
| 2026-08-09 00:00 |
06:32:07.31 |
+33:45:34.5 |
HIP 30982 |
26.65 |
| 2026-08-09 12:00 |
06:33:12.80 |
+33:43:13.8 |
HIP 31458 |
30.06 |
| 2026-08-10 00:00 |
06:34:18.14 |
+33:40:51.4 |
HIP 31458 |
20.22 |
| 2026-08-10 12:00 |
06:35:23.31 |
+33:38:27.4 |
HIP 31458 |
17.15 |
| 2026-08-11 00:00 |
06:36:28.32 |
+33:36:01.9 |
HIP 31616 |
7.33 |
| 2026-08-11 12:00 |
06:37:33.17 |
+33:33:34.7 |
HIP 31616 |
8.05 |
| 2026-08-12 00:00 |
06:38:37.86 |
+33:31:05.9 |
HIP 31616 |
21.25 |
| 2026-08-12 12:00 |
06:39:42.38 |
+33:28:35.5 |
HIP 31913 |
14.98 |
| 2026-08-13 00:00 |
06:40:46.73 |
+33:26:03.6 |
HIP 31913 |
18.11 |
| 2026-08-13 12:00 |
06:41:50.92 |
+33:23:30.1 |
HIP 31960 |
25.72 |
| 2026-08-14 00:00 |
06:42:54.93 |
+33:20:55.0 |
HIP 31960 |
33.06 |
| 2026-08-14 12:00 |
06:43:58.77 |
+33:18:18.4 |
HIP 32415 |
30.76 |
| 2026-08-15 00:00 |
06:45:02.44 |
+33:15:40.3 |
HIP 32415 |
18.77 |
| 2026-08-15 12:00 |
06:46:05.94 |
+33:13:00.7 |
HIP 32415 |
11.25 |
| 2026-08-16 00:00 |
06:47:09.26 |
+33:10:19.5 |
HIP 32546 |
5.46 |
| 2026-08-16 12:00 |
06:48:12.40 |
+33:07:36.9 |
HIP 32546 |
9.35 |
| 2026-08-17 00:00 |
06:49:15.37 |
+33:04:52.7 |
HIP 32791 |
15.09 |
| 2026-08-17 12:00 |
06:50:18.16 |
+33:02:07.1 |
HIP 32791 |
12.31 |
| 2026-08-18 00:00 |
06:51:20.77 |
+32:59:20.1 |
HIP 32999 |
18.42 |
| 2026-08-18 12:00 |
06:52:23.20 |
+32:56:31.5 |
HIP 32999 |
8.85 |
| 2026-08-19 00:00 |
06:53:25.45 |
+32:53:41.6 |
HIP 33166 |
11.99 |