| 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) |
| 2026-09-20 00:00 |
10:25:38.17 |
+17:38:15.9 |
HIP 51005 |
9.37 |
| 2026-09-20 12:00 |
10:26:19.57 |
+17:35:09.2 |
HIP 51005 |
16.88 |
| 2026-09-21 00:00 |
10:27:00.95 |
+17:32:02.5 |
HIP 51145 |
18.96 |
| 2026-09-21 12:00 |
10:27:42.30 |
+17:28:55.9 |
HIP 51145 |
19.66 |
| 2026-09-22 00:00 |
10:28:23.63 |
+17:25:49.2 |
HIP 51299 |
18.43 |
| 2026-09-22 12:00 |
10:29:04.94 |
+17:22:42.5 |
HIP 51299 |
15.57 |
| 2026-09-23 00:00 |
10:29:46.22 |
+17:19:35.9 |
HIP 51299 |
18.94 |
| 2026-09-23 12:00 |
10:30:27.48 |
+17:16:29.3 |
HIP 51388 |
20.46 |
| 2026-09-24 00:00 |
10:31:08.71 |
+17:13:22.7 |
HIP 51388 |
24.86 |
| 2026-09-24 12:00 |
10:31:49.91 |
+17:10:16.1 |
HIP 51388 |
32.11 |
| 2026-09-25 00:00 |
10:32:31.09 |
+17:07:09.6 |
HIP 51677 |
30.26 |
| 2026-09-25 12:00 |
10:33:12.24 |
+17:04:03.1 |
HIP 51677 |
30.58 |
| 2026-09-26 00:00 |
10:33:53.36 |
+17:00:56.7 |
HIP 51677 |
34.15 |
| 2026-09-26 12:00 |
10:34:34.46 |
+16:57:50.4 |
HIP 51965 |
38.62 |
| 2026-09-27 00:00 |
10:35:15.53 |
+16:54:44.1 |
HIP 51965 |
32.10 |
| 2026-09-27 12:00 |
10:35:56.57 |
+16:51:37.9 |
HIP 51965 |
27.94 |
| 2026-09-28 00:00 |
10:36:37.59 |
+16:48:31.8 |
HIP 51965 |
27.26 |
| 2026-09-28 12:00 |
10:37:18.58 |
+16:45:25.7 |
HIP 51965 |
30.27 |
| 2026-09-29 00:00 |
10:37:59.54 |
+16:42:19.7 |
HIP 52026 |
34.54 |
| 2026-09-29 12:00 |
10:38:40.47 |
+16:39:13.9 |
HIP 52120 |
31.76 |
| 2026-09-30 00:00 |
10:39:21.37 |
+16:36:08.1 |
HIP 52120 |
29.21 |
| 2026-09-30 12:00 |
10:40:02.24 |
+16:33:02.5 |
HIP 52295 |
25.15 |
| 2026-10-01 00:00 |
10:40:43.08 |
+16:29:56.9 |
HIP 52295 |
23.34 |
| 2026-10-01 12:00 |
10:41:23.90 |
+16:26:51.5 |
HIP 52363 |
14.44 |
| 2026-10-02 00:00 |
10:42:04.68 |
+16:23:46.3 |
HIP 52363 |
6.76 |
| 2026-10-02 12:00 |
10:42:45.43 |
+16:20:41.1 |
HIP 52363 |
9.66 |
| 2026-10-03 00:00 |
10:43:26.15 |
+16:17:36.1 |
HIP 52363 |
18.73 |
| 2026-10-03 12:00 |
10:44:06.84 |
+16:14:31.3 |
HIP 52580 |
15.49 |
| 2026-10-04 00:00 |
10:44:47.49 |
+16:11:26.6 |
HIP 52580 |
9.96 |
| 2026-10-04 12:00 |
10:45:28.11 |
+16:08:22.1 |
HIP 52580 |
12.95 |
| 2026-10-05 00:00 |
10:46:08.70 |
+16:05:17.8 |
HIP 52580 |
21.10 |
| 2026-10-05 12:00 |
10:46:49.26 |
+16:02:13.7 |
HIP 52718 |
30.40 |
| 2026-10-06 00:00 |
10:47:29.78 |
+15:59:09.8 |
HIP 52918 |
27.80 |
| 2026-10-06 12:00 |
10:48:10.26 |
+15:56:06.0 |
HIP 52918 |
17.64 |
| 2026-10-07 00:00 |
10:48:50.71 |
+15:53:02.5 |
HIP 52918 |
7.58 |
| 2026-10-07 12:00 |
10:49:31.13 |
+15:49:59.2 |
HIP 52918 |
3.41 |
| 2026-10-08 00:00 |
10:50:11.50 |
+15:46:56.2 |
HIP 52918 |
13.16 |
| 2026-10-08 12:00 |
10:50:51.84 |
+15:43:53.4 |
HIP 53031 |
19.51 |
| 2026-10-09 00:00 |
10:51:32.14 |
+15:40:50.8 |
HIP 53031 |
23.52 |
| 2026-10-09 12:00 |
10:52:12.41 |
+15:37:48.5 |
HIP 53124 |
28.02 |
| 2026-10-10 00:00 |
10:52:52.63 |
+15:34:46.5 |
HIP 53124 |
33.19 |
| 2026-10-10 12:00 |
10:53:32.81 |
+15:31:44.7 |
HIP 53366 |
26.62 |
| 2026-10-11 00:00 |
10:54:12.95 |
+15:28:43.3 |
HIP 53366 |
18.69 |