306P/LINEAR
| Parameter |
Value |
| Designation |
306P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-01-30T00:58:11.510400Z |
| Orbit solution date (soln_date, UTC) |
2025-12-02T15:12:53Z |
| Obs used |
406 |
| NEO |
Yes |
| M1 |
19.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-10-05.0000000 |
| e |
0.59853445 |
| q (au) |
1.246686 |
| a (au) |
3.105339 |
| i (deg) |
8.365199 |
| Ω (om, deg) |
341.493020 |
| ω (w, deg) |
0.694801 |
| M (ma, deg) |
338.919716 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 3.585\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
3.585 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
03:37:19.66 |
+29:51:54.4 |
HIP 16795 |
16.41 |
| 2026-02-03 12:00 |
03:37:55.48 |
+29:51:14.3 |
HIP 16795 |
23.86 |
| 2026-02-04 00:00 |
03:38:31.51 |
+29:50:35.5 |
HIP 17151 |
25.36 |
| 2026-02-04 12:00 |
03:39:07.73 |
+29:49:57.8 |
HIP 17151 |
18.16 |
| 2026-02-05 00:00 |
03:39:44.15 |
+29:49:21.3 |
HIP 17151 |
11.82 |
| 2026-02-05 12:00 |
03:40:20.76 |
+29:48:45.9 |
HIP 17151 |
8.64 |
| 2026-02-06 00:00 |
03:40:57.57 |
+29:48:11.7 |
HIP 17151 |
11.68 |
| 2026-02-06 12:00 |
03:41:34.56 |
+29:47:38.5 |
HIP 17151 |
18.08 |
| 2026-02-07 00:00 |
03:42:11.74 |
+29:47:06.5 |
HIP 17423 |
23.86 |
| 2026-02-07 12:00 |
03:42:49.11 |
+29:46:35.6 |
HIP 17423 |
15.97 |
| 2026-02-08 00:00 |
03:43:26.66 |
+29:46:05.7 |
HIP 17423 |
8.51 |
| 2026-02-08 12:00 |
03:44:04.38 |
+29:45:36.8 |
HIP 17423 |
4.84 |
| 2026-02-09 00:00 |
03:44:42.29 |
+29:45:08.9 |
HIP 17474 |
4.21 |
| 2026-02-09 12:00 |
03:45:20.38 |
+29:44:42.1 |
HIP 17474 |
9.78 |
| 2026-02-10 00:00 |
03:45:58.64 |
+29:44:16.2 |
HIP 17616 |
7.10 |
| 2026-02-10 12:00 |
03:46:37.07 |
+29:43:51.3 |
HIP 17616 |
4.29 |
| 2026-02-11 00:00 |
03:47:15.67 |
+29:43:27.3 |
HIP 17698 |
9.35 |
| 2026-02-11 12:00 |
03:47:54.45 |
+29:43:04.2 |
HIP 17698 |
11.35 |
| 2026-02-12 00:00 |
03:48:33.39 |
+29:42:42.1 |
HIP 17773 |
14.51 |
| 2026-02-12 12:00 |
03:49:12.50 |
+29:42:20.8 |
HIP 17937 |
13.01 |
| 2026-02-13 00:00 |
03:49:51.77 |
+29:42:00.4 |
HIP 17937 |
5.18 |
| 2026-02-13 12:00 |
03:50:31.20 |
+29:41:40.9 |
HIP 17971 |
3.02 |
| 2026-02-14 00:00 |
03:51:10.79 |
+29:41:22.1 |
HIP 18007 |
3.33 |
| 2026-02-14 12:00 |
03:51:50.54 |
+29:41:04.2 |
HIP 18007 |
11.39 |
| 2026-02-15 00:00 |
03:52:30.45 |
+29:40:47.1 |
HIP 18130 |
9.78 |
| 2026-02-15 12:00 |
03:53:10.51 |
+29:40:30.8 |
HIP 18130 |
12.09 |
| 2026-02-16 00:00 |
03:53:50.72 |
+29:40:15.2 |
HIP 18130 |
18.71 |
| 2026-02-16 12:00 |
03:54:31.08 |
+29:40:00.4 |
HIP 18130 |
26.62 |
| 2026-02-17 00:00 |
03:55:11.60 |
+29:39:46.3 |
HIP 18472 |
23.20 |
| 2026-02-17 12:00 |
03:55:52.26 |
+29:39:32.9 |
HIP 18472 |
15.06 |
| 2026-02-18 00:00 |
03:56:33.07 |
+29:39:20.2 |
HIP 18472 |
8.46 |
| 2026-02-18 12:00 |
03:57:14.02 |
+29:39:08.2 |
HIP 18472 |
8.62 |
| 2026-02-19 00:00 |
03:57:55.11 |
+29:38:56.8 |
HIP 18472 |
15.38 |
| 2026-02-19 12:00 |
03:58:36.34 |
+29:38:46.1 |
HIP 18687 |
20.44 |
| 2026-02-20 00:00 |
03:59:17.71 |
+29:38:36.0 |
HIP 18687 |
11.80 |
| 2026-02-20 12:00 |
03:59:59.22 |
+29:38:26.5 |
HIP 18687 |
4.69 |
| 2026-02-21 00:00 |
04:00:40.86 |
+29:38:17.5 |
HIP 18687 |
8.23 |
| 2026-02-21 12:00 |
04:01:22.64 |
+29:38:09.2 |
HIP 18687 |
16.67 |
| 2026-02-22 00:00 |
04:02:04.54 |
+29:38:01.4 |
HIP 18687 |
25.58 |
| 2026-02-22 12:00 |
04:02:46.57 |
+29:37:54.1 |
HIP 18965 |
29.53 |
| 2026-02-23 00:00 |
04:03:28.73 |
+29:37:47.4 |
HIP 18965 |
26.34 |
| 2026-02-23 12:00 |
04:04:11.01 |
+29:37:41.2 |
HIP 18965 |
26.18 |
| 2026-02-24 00:00 |
04:04:53.42 |
+29:37:35.4 |
HIP 18965 |
29.12 |