| Parameter |
Value |
| Designation |
32P/Comas Sola |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-01T13:07:20.858880Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T10:23:12Z |
| Obs used |
2872 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-12-16.0000000 |
| e |
0.55668781 |
| q (au) |
1.994409 |
| a (au) |
4.498882 |
| i (deg) |
9.943982 |
| Ω (om, deg) |
57.664762 |
| ω (w, deg) |
53.301243 |
| M (ma, deg) |
194.890347 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.509 + 5.372\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.509 |
| n |
5.372 |
| gf |
0.800 |
| gb |
-0.881 |
| k |
0.999 |
| 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 |
16:04:46.86 |
-23:53:05.3 |
HIP 78746 |
13.15 |
| 2026-09-20 12:00 |
16:05:02.29 |
-23:53:48.3 |
HIP 78746 |
13.59 |
| 2026-09-21 00:00 |
16:05:17.84 |
-23:54:31.6 |
HIP 78809 |
14.39 |
| 2026-09-21 12:00 |
16:05:33.51 |
-23:55:15.2 |
HIP 78809 |
15.46 |
| 2026-09-22 00:00 |
16:05:49.29 |
-23:55:59.1 |
HIP 78809 |
17.28 |
| 2026-09-22 12:00 |
16:06:05.20 |
-23:56:43.2 |
HIP 78996 |
19.36 |
| 2026-09-23 00:00 |
16:06:21.22 |
-23:57:27.5 |
HIP 78996 |
15.71 |
| 2026-09-23 12:00 |
16:06:37.35 |
-23:58:12.1 |
HIP 78996 |
12.07 |
| 2026-09-24 00:00 |
16:06:53.60 |
-23:58:56.9 |
HIP 78996 |
8.52 |
| 2026-09-24 12:00 |
16:07:09.96 |
-23:59:41.9 |
HIP 78996 |
5.28 |
| 2026-09-25 00:00 |
16:07:26.43 |
-24:00:27.2 |
HIP 78996 |
3.51 |
| 2026-09-25 12:00 |
16:07:43.01 |
-24:01:12.7 |
HIP 78996 |
5.13 |
| 2026-09-26 00:00 |
16:07:59.71 |
-24:01:58.5 |
HIP 78996 |
8.40 |
| 2026-09-26 12:00 |
16:08:16.52 |
-24:02:44.4 |
HIP 79054 |
11.78 |
| 2026-09-27 00:00 |
16:08:33.43 |
-24:03:30.6 |
HIP 79054 |
13.53 |
| 2026-09-27 12:00 |
16:08:50.45 |
-24:04:17.0 |
HIP 79054 |
16.08 |
| 2026-09-28 00:00 |
16:09:07.58 |
-24:05:03.6 |
HIP 79054 |
19.15 |
| 2026-09-28 12:00 |
16:09:24.82 |
-24:05:50.4 |
HIP 79054 |
22.52 |
| 2026-09-29 00:00 |
16:09:42.16 |
-24:06:37.4 |
HIP 79054 |
26.10 |
| 2026-09-29 12:00 |
16:09:59.61 |
-24:07:24.6 |
HIP 79229 |
27.63 |
| 2026-09-30 00:00 |
16:10:17.17 |
-24:08:12.0 |
HIP 79229 |
26.79 |
| 2026-09-30 12:00 |
16:10:34.83 |
-24:08:59.6 |
HIP 79392 |
25.67 |
| 2026-10-01 00:00 |
16:10:52.59 |
-24:09:47.4 |
HIP 79392 |
22.84 |
| 2026-10-01 12:00 |
16:11:10.45 |
-24:10:35.4 |
HIP 79392 |
20.45 |
| 2026-10-02 00:00 |
16:11:28.42 |
-24:11:23.5 |
HIP 79392 |
18.68 |
| 2026-10-02 12:00 |
16:11:46.48 |
-24:12:11.8 |
HIP 79392 |
17.73 |
| 2026-10-03 00:00 |
16:12:04.65 |
-24:13:00.3 |
HIP 79392 |
17.76 |
| 2026-10-03 12:00 |
16:12:22.92 |
-24:13:49.0 |
HIP 79392 |
18.77 |
| 2026-10-04 00:00 |
16:12:41.29 |
-24:14:37.9 |
HIP 79534 |
15.26 |
| 2026-10-04 12:00 |
16:12:59.76 |
-24:15:26.9 |
HIP 79534 |
11.03 |
| 2026-10-05 00:00 |
16:13:18.32 |
-24:16:16.1 |
HIP 79534 |
6.86 |
| 2026-10-05 12:00 |
16:13:36.98 |
-24:17:05.4 |
HIP 79534 |
3.10 |
| 2026-10-06 00:00 |
16:13:55.74 |
-24:17:54.9 |
HIP 79534 |
3.11 |
| 2026-10-06 12:00 |
16:14:14.59 |
-24:18:44.5 |
HIP 79534 |
6.92 |
| 2026-10-07 00:00 |
16:14:33.54 |
-24:19:34.3 |
HIP 79534 |
11.18 |
| 2026-10-07 12:00 |
16:14:52.58 |
-24:20:24.2 |
HIP 79534 |
15.53 |
| 2026-10-08 00:00 |
16:15:11.72 |
-24:21:14.3 |
HIP 79740 |
17.62 |
| 2026-10-08 12:00 |
16:15:30.95 |
-24:22:04.5 |
HIP 79740 |
13.71 |
| 2026-10-09 00:00 |
16:15:50.27 |
-24:22:54.8 |
HIP 79740 |
10.24 |
| 2026-10-09 12:00 |
16:16:09.68 |
-24:23:45.3 |
HIP 79740 |
7.86 |
| 2026-10-10 00:00 |
16:16:29.18 |
-24:24:35.9 |
HIP 79740 |
7.70 |
| 2026-10-10 12:00 |
16:16:48.77 |
-24:25:26.6 |
HIP 79740 |
9.90 |
| 2026-10-11 00:00 |
16:17:08.45 |
-24:26:17.5 |
HIP 79806 |
13.01 |