| 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) |
| 2026-06-01 00:00 |
17:13:30.28 |
+13:38:42.1 |
HIP 84167 |
28.77 |
| 2026-06-01 12:00 |
17:13:07.38 |
+13:41:31.4 |
HIP 84167 |
28.59 |
| 2026-06-02 00:00 |
17:12:44.39 |
+13:44:18.0 |
HIP 84167 |
29.71 |
| 2026-06-02 12:00 |
17:12:21.30 |
+13:47:02.0 |
HIP 84167 |
31.98 |
| 2026-06-03 00:00 |
17:11:58.12 |
+13:49:43.3 |
HIP 84032 |
31.07 |
| 2026-06-03 12:00 |
17:11:34.85 |
+13:52:21.9 |
HIP 84032 |
30.47 |
| 2026-06-04 00:00 |
17:11:11.51 |
+13:54:57.8 |
HIP 84032 |
31.08 |
| 2026-06-04 12:00 |
17:10:48.08 |
+13:57:31.0 |
HIP 84032 |
32.84 |
| 2026-06-05 00:00 |
17:10:24.58 |
+14:00:01.4 |
HIP 84032 |
35.58 |
| 2026-06-05 12:00 |
17:10:01.00 |
+14:02:29.0 |
HIP 83790 |
36.92 |
| 2026-06-06 00:00 |
17:09:37.37 |
+14:04:53.8 |
HIP 83790 |
31.09 |
| 2026-06-06 12:00 |
17:09:13.67 |
+14:07:15.8 |
HIP 83790 |
25.41 |
| 2026-06-07 00:00 |
17:08:49.91 |
+14:09:34.9 |
HIP 83790 |
20.04 |
| 2026-06-07 12:00 |
17:08:26.09 |
+14:11:51.1 |
HIP 83790 |
15.28 |
| 2026-06-08 00:00 |
17:08:02.23 |
+14:14:04.5 |
HIP 83790 |
11.90 |
| 2026-06-08 12:00 |
17:07:38.32 |
+14:16:14.9 |
HIP 83792 |
7.56 |
| 2026-06-09 00:00 |
17:07:14.37 |
+14:18:22.4 |
HIP 83792 |
6.39 |
| 2026-06-09 12:00 |
17:06:50.39 |
+14:20:27.0 |
HIP 83792 |
10.07 |
| 2026-06-10 00:00 |
17:06:26.37 |
+14:22:28.6 |
HIP 83792 |
15.43 |
| 2026-06-10 12:00 |
17:06:02.32 |
+14:24:27.2 |
HIP 83792 |
21.24 |
| 2026-06-11 00:00 |
17:05:38.25 |
+14:26:22.8 |
HIP 83552 |
25.81 |
| 2026-06-11 12:00 |
17:05:14.16 |
+14:28:15.5 |
HIP 83552 |
21.02 |
| 2026-06-12 00:00 |
17:04:50.06 |
+14:30:05.0 |
HIP 83552 |
17.16 |
| 2026-06-12 12:00 |
17:04:25.95 |
+14:31:51.6 |
HIP 83552 |
14.94 |
| 2026-06-13 00:00 |
17:04:01.83 |
+14:33:35.0 |
HIP 83435 |
12.74 |
| 2026-06-13 12:00 |
17:03:37.71 |
+14:35:15.5 |
HIP 83435 |
8.00 |
| 2026-06-14 00:00 |
17:03:13.60 |
+14:36:52.8 |
HIP 83411 |
5.50 |
| 2026-06-14 12:00 |
17:02:49.50 |
+14:38:27.0 |
HIP 83411 |
1.76 |
| 2026-06-15 00:00 |
17:02:25.41 |
+14:39:58.1 |
HIP 83411 |
6.98 |
| 2026-06-15 12:00 |
17:02:01.34 |
+14:41:26.2 |
HIP 83411 |
12.91 |
| 2026-06-16 00:00 |
17:01:37.29 |
+14:42:51.1 |
HIP 83308 |
14.17 |
| 2026-06-16 12:00 |
17:01:13.28 |
+14:44:12.8 |
HIP 83308 |
13.63 |
| 2026-06-17 00:00 |
17:00:49.29 |
+14:45:31.5 |
HIP 83308 |
15.59 |
| 2026-06-17 12:00 |
17:00:25.34 |
+14:46:47.0 |
HIP 83308 |
19.28 |
| 2026-06-18 00:00 |
17:00:01.44 |
+14:47:59.4 |
HIP 83221 |
22.53 |
| 2026-06-18 12:00 |
16:59:37.58 |
+14:49:08.6 |
HIP 83221 |
23.83 |
| 2026-06-19 00:00 |
16:59:13.78 |
+14:50:14.7 |
HIP 83034 |
25.22 |
| 2026-06-19 12:00 |
16:58:50.03 |
+14:51:17.7 |
HIP 83034 |
20.96 |
| 2026-06-20 00:00 |
16:58:26.34 |
+14:52:17.5 |
HIP 83034 |
17.68 |
| 2026-06-20 12:00 |
16:58:02.72 |
+14:53:14.2 |
HIP 83034 |
15.96 |
| 2026-06-21 00:00 |
16:57:39.17 |
+14:54:07.8 |
HIP 82955 |
15.79 |
| 2026-06-21 12:00 |
16:57:15.69 |
+14:54:58.2 |
HIP 82955 |
14.71 |
| 2026-06-22 00:00 |
16:56:52.29 |
+14:55:45.5 |
HIP 82955 |
15.73 |