| Parameter |
Value |
| Designation |
297P/Beshore |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-03-21T00:41:22.073280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:17Z |
| Obs used |
569 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
20.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-02-28.0000000 |
| e |
0.30860610 |
| q (au) |
2.408841 |
| a (au) |
3.484036 |
| i (deg) |
10.263390 |
| Ω (om, deg) |
98.285080 |
| ω (w, deg) |
131.820042 |
| M (ma, deg) |
52.131741 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.803 + 3.805\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.803 |
| n |
3.805 |
| gf |
0.800 |
| gb |
-0.883 |
| k |
0.998 |
| δ90 |
1.000 |
| 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) |
| 2026-07-29 00:00 |
09:11:35.05 |
+22:48:44.3 |
HIP 45004 |
23.78 |
| 2026-07-29 12:00 |
09:12:16.73 |
+22:46:08.0 |
HIP 45004 |
32.44 |
| 2026-07-30 00:00 |
09:12:58.43 |
+22:43:31.1 |
HIP 45379 |
26.37 |
| 2026-07-30 12:00 |
09:13:40.15 |
+22:40:53.8 |
HIP 45379 |
16.84 |
| 2026-07-31 00:00 |
09:14:21.89 |
+22:38:15.9 |
HIP 45379 |
8.39 |
| 2026-07-31 12:00 |
09:15:03.65 |
+22:35:37.6 |
HIP 45379 |
7.52 |
| 2026-08-01 00:00 |
09:15:45.42 |
+22:32:58.8 |
HIP 45379 |
15.57 |
| 2026-08-01 12:00 |
09:16:27.21 |
+22:30:19.5 |
HIP 45425 |
22.90 |
| 2026-08-02 00:00 |
09:17:09.02 |
+22:27:39.7 |
HIP 45425 |
31.47 |
| 2026-08-02 12:00 |
09:17:50.84 |
+22:24:59.4 |
HIP 45611 |
38.10 |
| 2026-08-03 00:00 |
09:18:32.68 |
+22:22:18.7 |
HIP 45830 |
33.85 |
| 2026-08-03 12:00 |
09:19:14.54 |
+22:19:37.5 |
HIP 45830 |
27.66 |
| 2026-08-04 00:00 |
09:19:56.40 |
+22:16:55.8 |
HIP 45830 |
24.20 |
| 2026-08-04 12:00 |
09:20:38.29 |
+22:14:13.6 |
HIP 45830 |
24.67 |
| 2026-08-05 00:00 |
09:21:20.19 |
+22:11:31.0 |
HIP 45954 |
24.90 |
| 2026-08-05 12:00 |
09:22:02.10 |
+22:08:47.9 |
HIP 46018 |
17.69 |
| 2026-08-06 00:00 |
09:22:44.03 |
+22:06:04.3 |
HIP 46018 |
13.34 |
| 2026-08-06 12:00 |
09:23:25.97 |
+22:03:20.3 |
HIP 46018 |
15.70 |
| 2026-08-07 00:00 |
09:24:07.92 |
+22:00:35.8 |
HIP 46018 |
22.77 |
| 2026-08-07 12:00 |
09:24:49.89 |
+21:57:50.9 |
HIP 46018 |
31.55 |
| 2026-08-08 00:00 |
09:25:31.86 |
+21:55:05.5 |
HIP 46309 |
29.38 |
| 2026-08-08 12:00 |
09:26:13.85 |
+21:52:19.7 |
HIP 46309 |
23.04 |
| 2026-08-09 00:00 |
09:26:55.85 |
+21:49:33.4 |
HIP 46309 |
20.09 |
| 2026-08-09 12:00 |
09:27:37.86 |
+21:46:46.7 |
HIP 46309 |
21.96 |
| 2026-08-10 00:00 |
09:28:19.88 |
+21:43:59.6 |
HIP 46309 |
27.69 |
| 2026-08-10 12:00 |
09:29:01.91 |
+21:41:12.1 |
HIP 46621 |
20.42 |
| 2026-08-11 00:00 |
09:29:43.95 |
+21:38:24.1 |
HIP 46621 |
13.86 |
| 2026-08-11 12:00 |
09:30:26.00 |
+21:35:35.7 |
HIP 46621 |
13.18 |
| 2026-08-12 00:00 |
09:31:08.05 |
+21:32:46.9 |
HIP 46621 |
19.03 |
| 2026-08-12 12:00 |
09:31:50.11 |
+21:29:57.7 |
HIP 46804 |
22.09 |
| 2026-08-13 00:00 |
09:32:32.18 |
+21:27:08.1 |
HIP 46804 |
24.65 |
| 2026-08-13 12:00 |
09:33:14.25 |
+21:24:18.1 |
HIP 46804 |
30.57 |
| 2026-08-14 00:00 |
09:33:56.33 |
+21:21:27.6 |
HIP 46804 |
38.34 |
| 2026-08-14 12:00 |
09:34:38.42 |
+21:18:36.9 |
HIP 46828 |
43.59 |
| 2026-08-15 00:00 |
09:35:20.51 |
+21:15:45.7 |
HIP 47197 |
47.81 |
| 2026-08-15 12:00 |
09:36:02.60 |
+21:12:54.1 |
HIP 47329 |
41.76 |
| 2026-08-16 00:00 |
09:36:44.70 |
+21:10:02.2 |
HIP 47383 |
34.63 |
| 2026-08-16 12:00 |
09:37:26.80 |
+21:07:09.9 |
HIP 47383 |
25.21 |
| 2026-08-17 00:00 |
09:38:08.90 |
+21:04:17.2 |
HIP 47383 |
16.76 |
| 2026-08-17 12:00 |
09:38:51.00 |
+21:01:24.2 |
HIP 47383 |
11.64 |
| 2026-08-18 00:00 |
09:39:33.10 |
+20:58:30.8 |
HIP 47383 |
14.13 |
| 2026-08-18 12:00 |
09:40:15.21 |
+20:55:37.1 |
HIP 47484 |
9.55 |
| 2026-08-19 00:00 |
09:40:57.32 |
+20:52:43.0 |
HIP 47484 |
9.05 |