| 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
$$
M_a = (20.000 + 2.741\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
2.741 |
| gf |
1.000 |
| gb |
-0.581 |
| 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) |
| 2026-09-20 00:00 |
09:04:37.22 |
+21:28:46.7 |
HIP 44408 |
26.17 |
| 2026-09-20 12:00 |
09:05:06.34 |
+21:26:49.5 |
HIP 44408 |
33.13 |
| 2026-09-21 00:00 |
09:05:35.32 |
+21:24:52.7 |
HIP 44812 |
34.57 |
| 2026-09-21 12:00 |
09:06:04.16 |
+21:22:56.3 |
HIP 44812 |
29.00 |
| 2026-09-22 00:00 |
09:06:32.87 |
+21:21:00.3 |
HIP 44812 |
24.21 |
| 2026-09-22 12:00 |
09:07:01.45 |
+21:19:04.8 |
HIP 44812 |
20.69 |
| 2026-09-23 00:00 |
09:07:29.89 |
+21:17:09.6 |
HIP 44792 |
16.92 |
| 2026-09-23 12:00 |
09:07:58.19 |
+21:15:15.0 |
HIP 44792 |
15.10 |
| 2026-09-24 00:00 |
09:08:26.36 |
+21:13:20.7 |
HIP 44792 |
16.23 |
| 2026-09-24 12:00 |
09:08:54.38 |
+21:11:27.0 |
HIP 44792 |
19.80 |
| 2026-09-25 00:00 |
09:09:22.27 |
+21:09:33.6 |
HIP 44792 |
24.73 |
| 2026-09-25 12:00 |
09:09:50.02 |
+21:07:40.8 |
HIP 44792 |
30.36 |
| 2026-09-26 00:00 |
09:10:17.63 |
+21:05:48.4 |
HIP 45046 |
34.59 |
| 2026-09-26 12:00 |
09:10:45.10 |
+21:03:56.5 |
HIP 45204 |
36.14 |
| 2026-09-27 00:00 |
09:11:12.43 |
+21:02:05.1 |
HIP 45204 |
30.21 |
| 2026-09-27 12:00 |
09:11:39.62 |
+21:00:14.2 |
HIP 45204 |
24.68 |
| 2026-09-28 00:00 |
09:12:06.66 |
+20:58:23.7 |
HIP 45204 |
19.84 |
| 2026-09-28 12:00 |
09:12:33.56 |
+20:56:33.8 |
HIP 45204 |
16.28 |
| 2026-09-29 00:00 |
09:13:00.32 |
+20:54:44.4 |
HIP 45204 |
14.91 |
| 2026-09-29 12:00 |
09:13:26.93 |
+20:52:55.5 |
HIP 45204 |
16.25 |
| 2026-09-30 00:00 |
09:13:53.39 |
+20:51:07.2 |
HIP 45204 |
19.72 |
| 2026-09-30 12:00 |
09:14:19.72 |
+20:49:19.4 |
HIP 45204 |
24.40 |
| 2026-10-01 00:00 |
09:14:45.89 |
+20:47:32.1 |
HIP 45519 |
28.48 |
| 2026-10-01 12:00 |
09:15:11.91 |
+20:45:45.4 |
HIP 45519 |
22.16 |
| 2026-10-02 00:00 |
09:15:37.79 |
+20:43:59.2 |
HIP 45519 |
15.91 |
| 2026-10-02 12:00 |
09:16:03.52 |
+20:42:13.7 |
HIP 45519 |
9.74 |
| 2026-10-03 00:00 |
09:16:29.09 |
+20:40:28.7 |
HIP 45519 |
3.96 |
| 2026-10-03 12:00 |
09:16:54.51 |
+20:38:44.2 |
HIP 45519 |
3.72 |
| 2026-10-04 00:00 |
09:17:19.79 |
+20:37:00.4 |
HIP 45519 |
9.39 |
| 2026-10-04 12:00 |
09:17:44.90 |
+20:35:17.2 |
HIP 45519 |
15.41 |
| 2026-10-05 00:00 |
09:18:09.87 |
+20:33:34.6 |
HIP 45671 |
16.45 |
| 2026-10-05 12:00 |
09:18:34.67 |
+20:31:52.6 |
HIP 45747 |
15.20 |
| 2026-10-06 00:00 |
09:18:59.32 |
+20:30:11.3 |
HIP 45747 |
9.75 |
| 2026-10-06 12:00 |
09:19:23.81 |
+20:28:30.6 |
HIP 45747 |
5.64 |
| 2026-10-07 00:00 |
09:19:48.15 |
+20:26:50.5 |
HIP 45747 |
6.29 |
| 2026-10-07 12:00 |
09:20:12.32 |
+20:25:11.1 |
HIP 45747 |
10.82 |
| 2026-10-08 00:00 |
09:20:36.33 |
+20:23:32.4 |
HIP 45747 |
16.22 |
| 2026-10-08 12:00 |
09:21:00.18 |
+20:21:54.3 |
HIP 45747 |
21.82 |
| 2026-10-09 00:00 |
09:21:23.87 |
+20:20:16.9 |
HIP 45747 |
27.47 |
| 2026-10-09 12:00 |
09:21:47.39 |
+20:18:40.3 |
HIP 46076 |
28.26 |
| 2026-10-10 00:00 |
09:22:10.74 |
+20:17:04.3 |
HIP 46076 |
23.11 |
| 2026-10-10 12:00 |
09:22:33.93 |
+20:15:29.0 |
HIP 46076 |
18.32 |
| 2026-10-11 00:00 |
09:22:56.96 |
+20:13:54.5 |
HIP 46076 |
14.21 |