| 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) |
| 2026-07-29 00:00 |
08:02:35.47 |
+25:11:20.9 |
HIP 39263 |
13.14 |
| 2026-07-29 12:00 |
08:03:15.54 |
+25:09:17.5 |
HIP 39297 |
19.15 |
| 2026-07-30 00:00 |
08:03:55.54 |
+25:07:13.9 |
HIP 39297 |
26.40 |
| 2026-07-30 12:00 |
08:04:35.45 |
+25:05:10.0 |
HIP 39648 |
32.09 |
| 2026-07-31 00:00 |
08:05:15.28 |
+25:03:05.9 |
HIP 39648 |
29.03 |
| 2026-07-31 12:00 |
08:05:55.03 |
+25:01:01.6 |
HIP 39648 |
28.74 |
| 2026-08-01 00:00 |
08:06:34.70 |
+24:58:57.1 |
HIP 39811 |
26.21 |
| 2026-08-01 12:00 |
08:07:14.29 |
+24:56:52.4 |
HIP 39811 |
18.25 |
| 2026-08-02 00:00 |
08:07:53.79 |
+24:54:47.4 |
HIP 39811 |
12.20 |
| 2026-08-02 12:00 |
08:08:33.22 |
+24:52:42.3 |
HIP 39811 |
11.57 |
| 2026-08-03 00:00 |
08:09:12.56 |
+24:50:36.9 |
HIP 39941 |
2.98 |
| 2026-08-03 12:00 |
08:09:51.82 |
+24:48:31.4 |
HIP 39941 |
6.20 |
| 2026-08-04 00:00 |
08:10:30.99 |
+24:46:25.6 |
HIP 39941 |
15.33 |
| 2026-08-04 12:00 |
08:11:10.09 |
+24:44:19.7 |
HIP 39941 |
24.45 |
| 2026-08-05 00:00 |
08:11:49.10 |
+24:42:13.6 |
HIP 40157 |
28.80 |
| 2026-08-05 12:00 |
08:12:28.02 |
+24:40:07.3 |
HIP 40120 |
29.66 |
| 2026-08-06 00:00 |
08:13:06.86 |
+24:38:00.9 |
HIP 40388 |
22.79 |
| 2026-08-06 12:00 |
08:13:45.62 |
+24:35:54.3 |
HIP 40388 |
15.50 |
| 2026-08-07 00:00 |
08:14:24.29 |
+24:33:47.5 |
HIP 40388 |
11.19 |
| 2026-08-07 12:00 |
08:15:02.87 |
+24:31:40.6 |
HIP 40388 |
13.17 |
| 2026-08-08 00:00 |
08:15:41.37 |
+24:29:33.5 |
HIP 40388 |
19.60 |
| 2026-08-08 12:00 |
08:16:19.79 |
+24:27:26.3 |
HIP 40595 |
18.55 |
| 2026-08-09 00:00 |
08:16:58.11 |
+24:25:18.9 |
HIP 40595 |
15.95 |
| 2026-08-09 12:00 |
08:17:36.35 |
+24:23:11.4 |
HIP 40595 |
18.04 |
| 2026-08-10 00:00 |
08:18:14.50 |
+24:21:03.8 |
HIP 40756 |
16.35 |
| 2026-08-10 12:00 |
08:18:52.56 |
+24:18:56.0 |
HIP 40756 |
9.26 |
| 2026-08-11 00:00 |
08:19:30.53 |
+24:16:48.2 |
HIP 40756 |
7.97 |
| 2026-08-11 12:00 |
08:20:08.42 |
+24:14:40.2 |
HIP 40756 |
14.13 |
| 2026-08-12 00:00 |
08:20:46.21 |
+24:12:32.2 |
HIP 40881 |
11.65 |
| 2026-08-12 12:00 |
08:21:23.91 |
+24:10:24.0 |
HIP 40881 |
14.89 |
| 2026-08-13 00:00 |
08:22:01.52 |
+24:08:15.7 |
HIP 41076 |
11.65 |
| 2026-08-13 12:00 |
08:22:39.04 |
+24:06:07.4 |
HIP 41076 |
2.84 |
| 2026-08-14 00:00 |
08:23:16.46 |
+24:03:59.0 |
HIP 41076 |
5.99 |
| 2026-08-14 12:00 |
08:23:53.80 |
+24:01:50.5 |
HIP 41076 |
14.78 |
| 2026-08-15 00:00 |
08:24:31.03 |
+23:59:41.9 |
HIP 41244 |
6.28 |
| 2026-08-15 12:00 |
08:25:08.18 |
+23:57:33.3 |
HIP 41244 |
3.07 |
| 2026-08-16 00:00 |
08:25:45.23 |
+23:55:24.6 |
HIP 41244 |
11.50 |
| 2026-08-16 12:00 |
08:26:22.18 |
+23:53:15.9 |
HIP 41244 |
20.17 |
| 2026-08-17 00:00 |
08:26:59.04 |
+23:51:07.1 |
HIP 41574 |
28.42 |
| 2026-08-17 12:00 |
08:27:35.80 |
+23:48:58.3 |
HIP 41574 |
24.15 |
| 2026-08-18 00:00 |
08:28:12.47 |
+23:46:49.5 |
HIP 41574 |
22.57 |
| 2026-08-18 12:00 |
08:28:49.04 |
+23:44:40.7 |
HIP 41574 |
24.19 |
| 2026-08-19 00:00 |
08:29:25.51 |
+23:42:31.8 |
HIP 41743 |
22.55 |