| 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) |
| 2026-05-12 00:00 |
07:33:43.87 |
+27:36:38.5 |
HIP 36718 |
13.17 |
| 2026-05-12 12:00 |
07:34:14.23 |
+27:35:34.5 |
HIP 36718 |
17.38 |
| 2026-05-13 00:00 |
07:34:44.74 |
+27:34:29.8 |
HIP 36718 |
22.92 |
| 2026-05-13 12:00 |
07:35:15.39 |
+27:33:24.6 |
HIP 36718 |
29.05 |
| 2026-05-14 00:00 |
07:35:46.19 |
+27:32:18.8 |
HIP 37131 |
29.30 |
| 2026-05-14 12:00 |
07:36:17.14 |
+27:31:12.5 |
HIP 37131 |
23.81 |
| 2026-05-15 00:00 |
07:36:48.23 |
+27:30:05.5 |
HIP 37131 |
19.28 |
| 2026-05-15 12:00 |
07:37:19.46 |
+27:28:58.0 |
HIP 37131 |
16.53 |
| 2026-05-16 00:00 |
07:37:50.83 |
+27:27:49.9 |
HIP 37131 |
16.54 |
| 2026-05-16 12:00 |
07:38:22.34 |
+27:26:41.2 |
HIP 37131 |
19.33 |
| 2026-05-17 00:00 |
07:38:53.98 |
+27:25:32.0 |
HIP 37131 |
23.99 |
| 2026-05-17 12:00 |
07:39:25.77 |
+27:24:22.1 |
HIP 37131 |
29.66 |
| 2026-05-18 00:00 |
07:39:57.69 |
+27:23:11.7 |
HIP 37407 |
35.46 |
| 2026-05-18 12:00 |
07:40:29.74 |
+27:22:00.7 |
HIP 37407 |
34.99 |
| 2026-05-19 00:00 |
07:41:01.93 |
+27:20:49.1 |
HIP 37407 |
36.01 |
| 2026-05-19 12:00 |
07:41:34.25 |
+27:19:36.9 |
HIP 37407 |
38.39 |
| 2026-05-20 00:00 |
07:42:06.69 |
+27:18:24.2 |
HIP 37407 |
41.94 |
| 2026-05-20 12:00 |
07:42:39.27 |
+27:17:10.8 |
HIP 37642 |
42.92 |
| 2026-05-21 00:00 |
07:43:11.97 |
+27:15:56.9 |
HIP 37642 |
40.41 |
| 2026-05-21 12:00 |
07:43:44.80 |
+27:14:42.4 |
HIP 37642 |
39.14 |
| 2026-05-22 00:00 |
07:44:17.75 |
+27:13:27.2 |
HIP 37886 |
36.69 |
| 2026-05-22 12:00 |
07:44:50.83 |
+27:12:11.5 |
HIP 37886 |
31.83 |
| 2026-05-23 00:00 |
07:45:24.03 |
+27:10:55.2 |
HIP 37886 |
28.14 |
| 2026-05-23 12:00 |
07:45:57.35 |
+27:09:38.3 |
HIP 37886 |
26.12 |
| 2026-05-24 00:00 |
07:46:30.78 |
+27:08:20.9 |
HIP 37886 |
26.20 |
| 2026-05-24 12:00 |
07:47:04.34 |
+27:07:02.8 |
HIP 37886 |
28.38 |
| 2026-05-25 00:00 |
07:47:38.01 |
+27:05:44.1 |
HIP 37886 |
32.26 |
| 2026-05-25 12:00 |
07:48:11.80 |
+27:04:24.8 |
HIP 38228 |
28.79 |
| 2026-05-26 00:00 |
07:48:45.70 |
+27:03:05.0 |
HIP 38228 |
24.25 |
| 2026-05-26 12:00 |
07:49:19.71 |
+27:01:44.5 |
HIP 38228 |
21.54 |
| 2026-05-27 00:00 |
07:49:53.84 |
+27:00:23.5 |
HIP 38228 |
21.40 |
| 2026-05-27 12:00 |
07:50:28.08 |
+26:59:01.8 |
HIP 38228 |
23.92 |
| 2026-05-28 00:00 |
07:51:02.43 |
+26:57:39.6 |
HIP 38228 |
28.41 |
| 2026-05-28 12:00 |
07:51:36.89 |
+26:56:16.7 |
HIP 38538 |
27.23 |
| 2026-05-29 00:00 |
07:52:11.45 |
+26:54:53.2 |
HIP 38538 |
19.64 |
| 2026-05-29 12:00 |
07:52:46.12 |
+26:53:29.2 |
HIP 38538 |
12.32 |
| 2026-05-30 00:00 |
07:53:20.90 |
+26:52:04.5 |
HIP 38538 |
6.44 |
| 2026-05-30 12:00 |
07:53:55.78 |
+26:50:39.2 |
HIP 38538 |
7.46 |
| 2026-05-31 00:00 |
07:54:30.77 |
+26:49:13.3 |
HIP 38538 |
13.99 |
| 2026-05-31 12:00 |
07:55:05.86 |
+26:47:46.8 |
HIP 38679 |
17.02 |
| 2026-06-01 00:00 |
07:55:41.05 |
+26:46:19.7 |
HIP 38679 |
19.82 |
| 2026-06-01 12:00 |
07:56:16.35 |
+26:44:52.0 |
HIP 38679 |
24.99 |
| 2026-06-02 00:00 |
07:56:51.74 |
+26:43:23.7 |
HIP 38679 |
31.40 |