| Parameter |
Value |
| Designation |
C/2009 K3 (Beshore) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-12-16T23:14:58.859520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:31Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-05-27.0000000 |
| e |
1.00000000 |
| q (au) |
2.869026 |
| a (au) |
- |
| i (deg) |
144.420909 |
| Ω (om, deg) |
0.729520 |
| ω (w, deg) |
268.400721 |
| M (ma, deg) |
- |
Magnitude
Scatter + Global Linear
$$
M_a = (4.131 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.131 |
| n |
6.000 |
| gf |
0.982 |
| gb |
-0.639 |
| k |
1.000 |
| δ90 |
9.948 |
| 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) |
| 2026-09-20 00:00 |
20:23:47.61 |
+10:15:55.7 |
HIP 100559 |
7.75 |
| 2026-09-20 12:00 |
20:23:45.24 |
+10:15:27.5 |
HIP 100559 |
7.76 |
| 2026-09-21 00:00 |
20:23:42.89 |
+10:14:59.3 |
HIP 100559 |
7.84 |
| 2026-09-21 12:00 |
20:23:40.57 |
+10:14:31.0 |
HIP 100559 |
8.00 |
| 2026-09-22 00:00 |
20:23:38.28 |
+10:14:02.7 |
HIP 100559 |
8.23 |
| 2026-09-22 12:00 |
20:23:36.01 |
+10:13:34.4 |
HIP 100559 |
8.51 |
| 2026-09-23 00:00 |
20:23:33.78 |
+10:13:06.0 |
HIP 100559 |
8.85 |
| 2026-09-23 12:00 |
20:23:31.56 |
+10:12:37.5 |
HIP 100559 |
9.23 |
| 2026-09-24 00:00 |
20:23:29.38 |
+10:12:09.1 |
HIP 100559 |
9.65 |
| 2026-09-24 12:00 |
20:23:27.22 |
+10:11:40.6 |
HIP 100559 |
10.11 |
| 2026-09-25 00:00 |
20:23:25.09 |
+10:11:12.1 |
HIP 100559 |
10.60 |
| 2026-09-25 12:00 |
20:23:22.99 |
+10:10:43.5 |
HIP 100559 |
11.11 |
| 2026-09-26 00:00 |
20:23:20.91 |
+10:10:14.9 |
HIP 100559 |
11.64 |
| 2026-09-26 12:00 |
20:23:18.86 |
+10:09:46.3 |
HIP 100559 |
12.18 |
| 2026-09-27 00:00 |
20:23:16.84 |
+10:09:17.7 |
HIP 100559 |
12.74 |
| 2026-09-27 12:00 |
20:23:14.85 |
+10:08:49.0 |
HIP 100559 |
13.31 |
| 2026-09-28 00:00 |
20:23:12.88 |
+10:08:20.4 |
HIP 100559 |
13.89 |
| 2026-09-28 12:00 |
20:23:10.95 |
+10:07:51.7 |
HIP 100559 |
14.48 |
| 2026-09-29 00:00 |
20:23:09.04 |
+10:07:23.0 |
HIP 100559 |
15.07 |
| 2026-09-29 12:00 |
20:23:07.16 |
+10:06:54.3 |
HIP 100559 |
15.66 |
| 2026-09-30 00:00 |
20:23:05.31 |
+10:06:25.6 |
HIP 100559 |
16.26 |
| 2026-09-30 12:00 |
20:23:03.48 |
+10:05:56.8 |
HIP 100559 |
16.86 |
| 2026-10-01 00:00 |
20:23:01.69 |
+10:05:28.1 |
HIP 100559 |
17.47 |
| 2026-10-01 12:00 |
20:22:59.92 |
+10:04:59.4 |
HIP 100559 |
18.07 |
| 2026-10-02 00:00 |
20:22:58.19 |
+10:04:30.6 |
HIP 100559 |
18.67 |
| 2026-10-02 12:00 |
20:22:56.48 |
+10:04:01.9 |
HIP 100559 |
19.28 |
| 2026-10-03 00:00 |
20:22:54.80 |
+10:03:33.2 |
HIP 100559 |
19.88 |
| 2026-10-03 12:00 |
20:22:53.15 |
+10:03:04.5 |
HIP 100559 |
20.48 |
| 2026-10-04 00:00 |
20:22:51.53 |
+10:02:35.8 |
HIP 100559 |
21.08 |
| 2026-10-04 12:00 |
20:22:49.94 |
+10:02:07.1 |
HIP 100559 |
21.68 |
| 2026-10-05 00:00 |
20:22:48.38 |
+10:01:38.4 |
HIP 100559 |
22.28 |
| 2026-10-05 12:00 |
20:22:46.85 |
+10:01:09.7 |
HIP 100559 |
22.87 |
| 2026-10-06 00:00 |
20:22:45.35 |
+10:00:41.0 |
HIP 100559 |
23.46 |
| 2026-10-06 12:00 |
20:22:43.88 |
+10:00:12.4 |
HIP 100559 |
24.05 |
| 2026-10-07 00:00 |
20:22:42.44 |
+09:59:43.8 |
HIP 100559 |
24.63 |
| 2026-10-07 12:00 |
20:22:41.03 |
+09:59:15.2 |
HIP 100559 |
25.21 |
| 2026-10-08 00:00 |
20:22:39.65 |
+09:58:46.6 |
HIP 100559 |
25.79 |
| 2026-10-08 12:00 |
20:22:38.30 |
+09:58:18.1 |
HIP 100559 |
26.37 |
| 2026-10-09 00:00 |
20:22:36.98 |
+09:57:49.6 |
HIP 100559 |
26.94 |
| 2026-10-09 12:00 |
20:22:35.69 |
+09:57:21.1 |
HIP 100559 |
27.50 |
| 2026-10-10 00:00 |
20:22:34.43 |
+09:56:52.7 |
HIP 100559 |
28.07 |
| 2026-10-10 12:00 |
20:22:33.20 |
+09:56:24.3 |
HIP 100559 |
28.63 |
| 2026-10-11 00:00 |
20:22:32.00 |
+09:55:55.9 |
HIP 100559 |
29.18 |