206P/Barnard-Boattini
| Parameter |
Value |
| Designation |
206P/Barnard-Boattini |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-10-24T01:07:08.970240Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T23:01:17Z |
| Obs used |
284 |
| NEO |
Yes |
| M1 |
20.300 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-07-06.0000000 |
| e |
0.64853407 |
| q (au) |
1.136482 |
| a (au) |
3.233549 |
| i (deg) |
33.203832 |
| Ω (om, deg) |
204.376478 |
| ω (w, deg) |
181.361053 |
| M (ma, deg) |
217.437581 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 2.307\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
2.307 |
| gf |
1.000 |
| gb |
-0.849 |
| k |
0.973 |
| 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) |
| 2026-02-03 00:00 |
17:05:43.06 |
-01:15:49.8 |
HIP 83732 |
16.17 |
| 2026-02-03 12:00 |
17:06:06.59 |
-01:13:43.8 |
HIP 83732 |
10.44 |
| 2026-02-04 00:00 |
17:06:30.03 |
-01:11:36.5 |
HIP 83732 |
5.92 |
| 2026-02-04 12:00 |
17:06:53.36 |
-01:09:27.7 |
HIP 83732 |
6.23 |
| 2026-02-05 00:00 |
17:07:16.58 |
-01:07:17.7 |
HIP 83732 |
10.95 |
| 2026-02-05 12:00 |
17:07:39.71 |
-01:05:06.3 |
HIP 83853 |
8.49 |
| 2026-02-06 00:00 |
17:08:02.73 |
-01:02:53.5 |
HIP 83853 |
3.31 |
| 2026-02-06 12:00 |
17:08:25.64 |
-01:00:39.4 |
HIP 83853 |
5.08 |
| 2026-02-07 00:00 |
17:08:48.45 |
-00:58:24.0 |
HIP 83853 |
10.78 |
| 2026-02-07 12:00 |
17:09:11.15 |
-00:56:07.1 |
HIP 83853 |
16.77 |
| 2026-02-08 00:00 |
17:09:33.74 |
-00:53:49.0 |
HIP 83991 |
12.29 |
| 2026-02-08 12:00 |
17:09:56.22 |
-00:51:29.4 |
HIP 83991 |
6.86 |
| 2026-02-09 00:00 |
17:10:18.59 |
-00:49:08.6 |
HIP 83991 |
4.09 |
| 2026-02-09 12:00 |
17:10:40.84 |
-00:46:46.3 |
HIP 83991 |
7.71 |
| 2026-02-10 00:00 |
17:11:02.98 |
-00:44:22.7 |
HIP 83991 |
13.21 |
| 2026-02-10 12:00 |
17:11:25.01 |
-00:41:57.8 |
HIP 84166 |
15.06 |
| 2026-02-11 00:00 |
17:11:46.92 |
-00:39:31.4 |
HIP 84166 |
11.27 |
| 2026-02-11 12:00 |
17:12:08.71 |
-00:37:03.8 |
HIP 84166 |
9.98 |
| 2026-02-12 00:00 |
17:12:30.38 |
-00:34:34.7 |
HIP 84166 |
12.01 |
| 2026-02-12 12:00 |
17:12:51.93 |
-00:32:04.3 |
HIP 84253 |
11.82 |
| 2026-02-13 00:00 |
17:13:13.36 |
-00:29:32.5 |
HIP 84253 |
6.97 |
| 2026-02-13 12:00 |
17:13:34.66 |
-00:26:59.4 |
HIP 84253 |
5.22 |
| 2026-02-14 00:00 |
17:13:55.84 |
-00:24:24.9 |
HIP 84253 |
8.66 |
| 2026-02-14 12:00 |
17:14:16.90 |
-00:21:49.1 |
HIP 84253 |
13.83 |
| 2026-02-15 00:00 |
17:14:37.83 |
-00:19:11.8 |
HIP 84253 |
19.38 |
| 2026-02-15 12:00 |
17:14:58.63 |
-00:16:33.3 |
HIP 84253 |
25.04 |
| 2026-02-16 00:00 |
17:15:19.30 |
-00:13:53.3 |
HIP 84514 |
23.21 |
| 2026-02-16 12:00 |
17:15:39.84 |
-00:11:12.1 |
HIP 84514 |
21.04 |
| 2026-02-17 00:00 |
17:16:00.25 |
-00:08:29.4 |
HIP 84514 |
20.37 |
| 2026-02-17 12:00 |
17:16:20.52 |
-00:05:45.4 |
HIP 84514 |
21.34 |
| 2026-02-18 00:00 |
17:16:40.66 |
-00:03:00.1 |
HIP 84514 |
23.73 |
| 2026-02-18 12:00 |
17:17:00.67 |
-00:00:13.4 |
HIP 84514 |
27.15 |
| 2026-02-19 00:00 |
17:17:20.53 |
+00:02:34.7 |
HIP 84514 |
31.27 |
| 2026-02-19 12:00 |
17:17:40.26 |
+00:05:24.1 |
HIP 84707 |
34.81 |
| 2026-02-20 00:00 |
17:17:59.85 |
+00:08:14.8 |
HIP 84707 |
29.89 |
| 2026-02-20 12:00 |
17:18:19.30 |
+00:11:06.9 |
HIP 84707 |
25.27 |
| 2026-02-21 00:00 |
17:18:38.60 |
+00:14:00.3 |
HIP 84707 |
21.15 |
| 2026-02-21 12:00 |
17:18:57.77 |
+00:16:55.1 |
HIP 84817 |
16.76 |
| 2026-02-22 00:00 |
17:19:16.79 |
+00:19:51.2 |
HIP 84817 |
12.47 |
| 2026-02-22 12:00 |
17:19:35.66 |
+00:22:48.6 |
HIP 84817 |
9.65 |
| 2026-02-23 00:00 |
17:19:54.38 |
+00:25:47.3 |
HIP 84817 |
9.67 |
| 2026-02-23 12:00 |
17:20:12.96 |
+00:28:47.4 |
HIP 84817 |
12.48 |
| 2026-02-24 00:00 |
17:20:31.39 |
+00:31:48.8 |
HIP 84817 |
16.71 |