| Parameter |
Value |
| Designation |
C/2009 B2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-03-07T09:25:59.010240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:28Z |
| Obs used |
187 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-03-11.0000000 |
| e |
0.94428145 |
| q (au) |
2.327612 |
| a (au) |
41.774447 |
| i (deg) |
156.872979 |
| Ω (om, deg) |
18.814641 |
| ω (w, deg) |
192.495776 |
| M (ma, deg) |
0.013167 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.370 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.370 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.916 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
02:02:40.14 |
+07:32:19.3 |
HIP 9548 |
15.18 |
| 2026-06-01 12:00 |
02:02:42.60 |
+07:32:31.3 |
HIP 9548 |
14.97 |
| 2026-06-02 00:00 |
02:02:45.05 |
+07:32:43.1 |
HIP 9548 |
14.79 |
| 2026-06-02 12:00 |
02:02:47.47 |
+07:32:54.8 |
HIP 9548 |
14.64 |
| 2026-06-03 00:00 |
02:02:49.88 |
+07:33:06.4 |
HIP 9548 |
14.51 |
| 2026-06-03 12:00 |
02:02:52.27 |
+07:33:17.8 |
HIP 9548 |
14.41 |
| 2026-06-04 00:00 |
02:02:54.64 |
+07:33:29.1 |
HIP 9548 |
14.33 |
| 2026-06-04 12:00 |
02:02:57.00 |
+07:33:40.3 |
HIP 9548 |
14.29 |
| 2026-06-05 00:00 |
02:02:59.34 |
+07:33:51.4 |
HIP 9548 |
14.27 |
| 2026-06-05 12:00 |
02:03:01.66 |
+07:34:02.4 |
HIP 9548 |
14.28 |
| 2026-06-06 00:00 |
02:03:03.96 |
+07:34:13.2 |
HIP 9548 |
14.31 |
| 2026-06-06 12:00 |
02:03:06.24 |
+07:34:23.8 |
HIP 9548 |
14.37 |
| 2026-06-07 00:00 |
02:03:08.51 |
+07:34:34.4 |
HIP 9548 |
14.45 |
| 2026-06-07 12:00 |
02:03:10.75 |
+07:34:44.8 |
HIP 9548 |
14.56 |
| 2026-06-08 00:00 |
02:03:12.98 |
+07:34:55.1 |
HIP 9548 |
14.69 |
| 2026-06-08 12:00 |
02:03:15.18 |
+07:35:05.3 |
HIP 9548 |
14.83 |
| 2026-06-09 00:00 |
02:03:17.37 |
+07:35:15.3 |
HIP 9548 |
15.00 |
| 2026-06-09 12:00 |
02:03:19.54 |
+07:35:25.1 |
HIP 9548 |
15.19 |
| 2026-06-10 00:00 |
02:03:21.68 |
+07:35:34.9 |
HIP 9548 |
15.39 |
| 2026-06-10 12:00 |
02:03:23.81 |
+07:35:44.5 |
HIP 9548 |
15.61 |
| 2026-06-11 00:00 |
02:03:25.92 |
+07:35:54.0 |
HIP 9548 |
15.84 |
| 2026-06-11 12:00 |
02:03:28.01 |
+07:36:03.3 |
HIP 9548 |
16.08 |
| 2026-06-12 00:00 |
02:03:30.07 |
+07:36:12.5 |
HIP 9548 |
16.34 |
| 2026-06-12 12:00 |
02:03:32.12 |
+07:36:21.6 |
HIP 9548 |
16.61 |
| 2026-06-13 00:00 |
02:03:34.14 |
+07:36:30.5 |
HIP 9548 |
16.89 |
| 2026-06-13 12:00 |
02:03:36.15 |
+07:36:39.2 |
HIP 9548 |
17.18 |
| 2026-06-14 00:00 |
02:03:38.13 |
+07:36:47.9 |
HIP 9548 |
17.47 |
| 2026-06-14 12:00 |
02:03:40.09 |
+07:36:56.4 |
HIP 9548 |
17.77 |
| 2026-06-15 00:00 |
02:03:42.03 |
+07:37:04.7 |
HIP 9548 |
18.08 |
| 2026-06-15 12:00 |
02:03:43.95 |
+07:37:12.9 |
HIP 9706 |
18.00 |
| 2026-06-16 00:00 |
02:03:45.84 |
+07:37:21.0 |
HIP 9706 |
17.51 |
| 2026-06-16 12:00 |
02:03:47.72 |
+07:37:28.9 |
HIP 9706 |
17.03 |
| 2026-06-17 00:00 |
02:03:49.57 |
+07:37:36.6 |
HIP 9706 |
16.56 |
| 2026-06-17 12:00 |
02:03:51.40 |
+07:37:44.2 |
HIP 9706 |
16.09 |
| 2026-06-18 00:00 |
02:03:53.20 |
+07:37:51.7 |
HIP 9706 |
15.63 |
| 2026-06-18 12:00 |
02:03:54.99 |
+07:37:59.0 |
HIP 9706 |
15.18 |
| 2026-06-19 00:00 |
02:03:56.75 |
+07:38:06.2 |
HIP 9706 |
14.73 |
| 2026-06-19 12:00 |
02:03:58.49 |
+07:38:13.2 |
HIP 9706 |
14.29 |
| 2026-06-20 00:00 |
02:04:00.20 |
+07:38:20.1 |
HIP 9706 |
13.86 |
| 2026-06-20 12:00 |
02:04:01.89 |
+07:38:26.9 |
HIP 9706 |
13.43 |
| 2026-06-21 00:00 |
02:04:03.56 |
+07:38:33.4 |
HIP 9706 |
13.01 |
| 2026-06-21 12:00 |
02:04:05.20 |
+07:38:39.9 |
HIP 9706 |
12.60 |
| 2026-06-22 00:00 |
02:04:06.82 |
+07:38:46.1 |
HIP 9706 |
12.19 |