| Parameter |
Value |
| Designation |
209P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-30T20:16:24.784320Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:39Z |
| Obs used |
2879 |
| NEO |
Yes |
| M1 |
18.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-06-09.0000000 |
| e |
0.68144491 |
| q (au) |
0.939590 |
| a (au) |
2.949537 |
| i (deg) |
21.337815 |
| Ω (om, deg) |
62.868525 |
| ω (w, deg) |
152.634859 |
| M (ma, deg) |
225.583149 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.965 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.965 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.542 |
| 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) |
| 2026-06-01 00:00 |
02:16:16.51 |
+01:13:56.5 |
HIP 10697 |
21.55 |
| 2026-06-01 12:00 |
02:16:37.67 |
+01:15:35.2 |
HIP 10697 |
16.14 |
| 2026-06-02 00:00 |
02:16:58.76 |
+01:17:13.0 |
HIP 10697 |
10.87 |
| 2026-06-02 12:00 |
02:17:19.78 |
+01:18:50.0 |
HIP 10697 |
6.08 |
| 2026-06-03 00:00 |
02:17:40.74 |
+01:20:26.2 |
HIP 10697 |
4.00 |
| 2026-06-03 12:00 |
02:18:01.63 |
+01:22:01.6 |
HIP 10697 |
7.40 |
| 2026-06-04 00:00 |
02:18:22.45 |
+01:23:36.0 |
HIP 10697 |
12.35 |
| 2026-06-04 12:00 |
02:18:43.20 |
+01:25:09.7 |
HIP 10697 |
17.57 |
| 2026-06-05 00:00 |
02:19:03.89 |
+01:26:42.5 |
HIP 10697 |
22.86 |
| 2026-06-05 12:00 |
02:19:24.50 |
+01:28:14.4 |
HIP 10953 |
26.53 |
| 2026-06-06 00:00 |
02:19:45.05 |
+01:29:45.5 |
HIP 10953 |
21.19 |
| 2026-06-06 12:00 |
02:20:05.52 |
+01:31:15.7 |
HIP 10953 |
15.88 |
| 2026-06-07 00:00 |
02:20:25.92 |
+01:32:45.1 |
HIP 10953 |
10.62 |
| 2026-06-07 12:00 |
02:20:46.24 |
+01:34:13.5 |
HIP 10953 |
5.49 |
| 2026-06-08 00:00 |
02:21:06.50 |
+01:35:41.2 |
HIP 10953 |
1.85 |
| 2026-06-08 12:00 |
02:21:26.67 |
+01:37:07.9 |
HIP 10953 |
5.66 |
| 2026-06-09 00:00 |
02:21:46.78 |
+01:38:33.8 |
HIP 10953 |
10.73 |
| 2026-06-09 12:00 |
02:22:06.80 |
+01:39:58.8 |
HIP 11064 |
10.82 |
| 2026-06-10 00:00 |
02:22:26.75 |
+01:41:22.9 |
HIP 11064 |
8.58 |
| 2026-06-10 12:00 |
02:22:46.62 |
+01:42:46.2 |
HIP 11064 |
9.15 |
| 2026-06-11 00:00 |
02:23:06.41 |
+01:44:08.5 |
HIP 11064 |
12.12 |
| 2026-06-11 12:00 |
02:23:26.12 |
+01:45:30.0 |
HIP 11064 |
16.19 |
| 2026-06-12 00:00 |
02:23:45.75 |
+01:46:50.6 |
HIP 11064 |
20.71 |
| 2026-06-12 12:00 |
02:24:05.30 |
+01:48:10.3 |
HIP 11286 |
23.36 |
| 2026-06-13 00:00 |
02:24:24.76 |
+01:49:29.0 |
HIP 11286 |
20.39 |
| 2026-06-13 12:00 |
02:24:44.15 |
+01:50:46.9 |
HIP 11286 |
18.34 |
| 2026-06-14 00:00 |
02:25:03.44 |
+01:52:03.9 |
HIP 11286 |
17.52 |
| 2026-06-14 12:00 |
02:25:22.65 |
+01:53:19.9 |
HIP 11286 |
18.08 |
| 2026-06-15 00:00 |
02:25:41.78 |
+01:54:35.1 |
HIP 11286 |
19.88 |
| 2026-06-15 12:00 |
02:26:00.81 |
+01:55:49.3 |
HIP 11286 |
22.62 |
| 2026-06-16 00:00 |
02:26:19.76 |
+01:57:02.7 |
HIP 11474 |
25.03 |
| 2026-06-16 12:00 |
02:26:38.62 |
+01:58:15.1 |
HIP 11474 |
20.32 |
| 2026-06-17 00:00 |
02:26:57.39 |
+01:59:26.6 |
HIP 11474 |
15.73 |
| 2026-06-17 12:00 |
02:27:16.07 |
+02:00:37.2 |
HIP 11474 |
11.35 |
| 2026-06-18 00:00 |
02:27:34.65 |
+02:01:46.8 |
HIP 11474 |
7.54 |
| 2026-06-18 12:00 |
02:27:53.15 |
+02:02:55.5 |
HIP 11474 |
5.54 |
| 2026-06-19 00:00 |
02:28:11.55 |
+02:04:03.3 |
HIP 11474 |
7.03 |
| 2026-06-19 12:00 |
02:28:29.85 |
+02:05:10.2 |
HIP 11474 |
10.60 |
| 2026-06-20 00:00 |
02:28:48.06 |
+02:06:16.2 |
HIP 11597 |
11.88 |
| 2026-06-20 12:00 |
02:29:06.17 |
+02:07:21.2 |
HIP 11597 |
7.40 |
| 2026-06-21 00:00 |
02:29:24.19 |
+02:08:25.3 |
HIP 11597 |
3.42 |
| 2026-06-21 12:00 |
02:29:42.11 |
+02:09:28.5 |
HIP 11597 |
3.38 |
| 2026-06-22 00:00 |
02:29:59.92 |
+02:10:30.7 |
HIP 11597 |
7.28 |