| 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) |
| 2026-09-20 00:00 |
16:47:13.90 |
+08:00:21.8 |
HIP 82045 |
24.61 |
| 2026-09-20 12:00 |
16:47:34.32 |
+07:56:58.3 |
HIP 82248 |
28.98 |
| 2026-09-21 00:00 |
16:47:54.97 |
+07:53:35.1 |
HIP 82248 |
30.90 |
| 2026-09-21 12:00 |
16:48:15.84 |
+07:50:12.4 |
HIP 82248 |
33.83 |
| 2026-09-22 00:00 |
16:48:36.95 |
+07:46:50.1 |
HIP 82400 |
33.88 |
| 2026-09-22 12:00 |
16:48:58.28 |
+07:43:28.3 |
HIP 82400 |
32.92 |
| 2026-09-23 00:00 |
16:49:19.83 |
+07:40:06.9 |
HIP 82402 |
29.25 |
| 2026-09-23 12:00 |
16:49:41.61 |
+07:36:46.0 |
HIP 82402 |
23.82 |
| 2026-09-24 00:00 |
16:50:03.61 |
+07:33:25.6 |
HIP 82402 |
18.97 |
| 2026-09-24 12:00 |
16:50:25.84 |
+07:30:05.7 |
HIP 82402 |
15.32 |
| 2026-09-25 00:00 |
16:50:48.28 |
+07:26:46.3 |
HIP 82402 |
13.90 |
| 2026-09-25 12:00 |
16:51:10.95 |
+07:23:27.4 |
HIP 82402 |
15.41 |
| 2026-09-26 00:00 |
16:51:33.83 |
+07:20:09.1 |
HIP 82402 |
19.21 |
| 2026-09-26 12:00 |
16:51:56.93 |
+07:16:51.3 |
HIP 82402 |
24.28 |
| 2026-09-27 00:00 |
16:52:20.25 |
+07:13:34.0 |
HIP 82614 |
22.59 |
| 2026-09-27 12:00 |
16:52:43.79 |
+07:10:17.3 |
HIP 82614 |
22.21 |
| 2026-09-28 00:00 |
16:53:07.54 |
+07:07:01.2 |
HIP 82614 |
23.78 |
| 2026-09-28 12:00 |
16:53:31.50 |
+07:03:45.6 |
HIP 82733 |
23.24 |
| 2026-09-29 00:00 |
16:53:55.68 |
+07:00:30.6 |
HIP 82696 |
20.54 |
| 2026-09-29 12:00 |
16:54:20.07 |
+06:57:16.2 |
HIP 82696 |
16.82 |
| 2026-09-30 00:00 |
16:54:44.68 |
+06:54:02.5 |
HIP 82696 |
15.48 |
| 2026-09-30 12:00 |
16:55:09.49 |
+06:50:49.3 |
HIP 82696 |
17.12 |
| 2026-10-01 00:00 |
16:55:34.52 |
+06:47:36.8 |
HIP 82696 |
21.11 |
| 2026-10-01 12:00 |
16:55:59.76 |
+06:44:24.9 |
HIP 82929 |
19.19 |
| 2026-10-02 00:00 |
16:56:25.20 |
+06:41:13.6 |
HIP 82929 |
12.87 |
| 2026-10-02 12:00 |
16:56:50.86 |
+06:38:03.1 |
HIP 82929 |
7.97 |
| 2026-10-03 00:00 |
16:57:16.72 |
+06:34:53.1 |
HIP 82929 |
7.97 |
| 2026-10-03 12:00 |
16:57:42.79 |
+06:31:43.9 |
HIP 82929 |
12.94 |
| 2026-10-04 00:00 |
16:58:09.07 |
+06:28:35.4 |
HIP 83120 |
16.98 |
| 2026-10-04 12:00 |
16:58:35.55 |
+06:25:27.5 |
HIP 83120 |
13.78 |
| 2026-10-05 00:00 |
16:59:02.23 |
+06:22:20.4 |
HIP 83120 |
14.04 |
| 2026-10-05 12:00 |
16:59:29.13 |
+06:19:14.0 |
HIP 83120 |
17.66 |
| 2026-10-06 00:00 |
16:59:56.22 |
+06:16:08.3 |
HIP 83223 |
20.61 |
| 2026-10-06 12:00 |
17:00:23.52 |
+06:13:03.4 |
HIP 83277 |
18.64 |
| 2026-10-07 00:00 |
17:00:51.02 |
+06:09:59.2 |
HIP 83277 |
18.17 |
| 2026-10-07 12:00 |
17:01:18.72 |
+06:06:55.8 |
HIP 83277 |
20.60 |
| 2026-10-08 00:00 |
17:01:46.62 |
+06:03:53.2 |
HIP 83277 |
25.15 |
| 2026-10-08 12:00 |
17:02:14.72 |
+06:00:51.3 |
HIP 83277 |
30.92 |
| 2026-10-09 00:00 |
17:02:43.02 |
+05:57:50.3 |
HIP 83277 |
37.38 |
| 2026-10-09 12:00 |
17:03:11.52 |
+05:54:50.1 |
HIP 83620 |
44.05 |
| 2026-10-10 00:00 |
17:03:40.21 |
+05:51:50.7 |
HIP 83620 |
41.31 |
| 2026-10-10 12:00 |
17:04:09.10 |
+05:48:52.2 |
HIP 83620 |
39.87 |
| 2026-10-11 00:00 |
17:04:38.18 |
+05:45:54.5 |
HIP 83620 |
39.89 |