32P/Comas Sola
| Parameter |
Value |
| Designation |
32P/Comas Sola |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-05-01T13:45:17.645760Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:18:22Z |
| Obs used |
2867 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-12-14.0000000 |
| e |
0.55667903 |
| q (au) |
1.994458 |
| a (au) |
4.498903 |
| i (deg) |
9.944091 |
| Ω (om, deg) |
57.665791 |
| ω (w, deg) |
53.300686 |
| M (ma, deg) |
194.682189 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.511 + 5.370\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.511 |
| n |
5.370 |
| 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) |
| 2026-02-03 00:00 |
16:31:10.68 |
-22:37:47.2 |
HIP 80937 |
11.98 |
| 2026-02-03 12:00 |
16:31:28.62 |
-22:38:50.1 |
HIP 80937 |
9.45 |
| 2026-02-04 00:00 |
16:31:46.41 |
-22:39:52.7 |
HIP 80937 |
8.46 |
| 2026-02-04 12:00 |
16:32:04.05 |
-22:40:54.9 |
HIP 80937 |
9.45 |
| 2026-02-05 00:00 |
16:32:21.53 |
-22:41:56.7 |
HIP 80937 |
11.90 |
| 2026-02-05 12:00 |
16:32:38.86 |
-22:42:58.1 |
HIP 80937 |
15.08 |
| 2026-02-06 00:00 |
16:32:56.04 |
-22:43:59.2 |
HIP 81093 |
13.58 |
| 2026-02-06 12:00 |
16:33:13.05 |
-22:44:59.9 |
HIP 81093 |
9.61 |
| 2026-02-07 00:00 |
16:33:29.92 |
-22:46:00.2 |
HIP 81093 |
5.79 |
| 2026-02-07 12:00 |
16:33:46.62 |
-22:47:00.1 |
HIP 81093 |
2.67 |
| 2026-02-08 00:00 |
16:34:03.17 |
-22:47:59.7 |
HIP 81093 |
3.48 |
| 2026-02-08 12:00 |
16:34:19.55 |
-22:48:58.8 |
HIP 81093 |
6.90 |
| 2026-02-09 00:00 |
16:34:35.78 |
-22:49:57.7 |
HIP 81093 |
10.62 |
| 2026-02-09 12:00 |
16:34:51.84 |
-22:50:56.1 |
HIP 81169 |
14.14 |
| 2026-02-10 00:00 |
16:35:07.73 |
-22:51:54.2 |
HIP 81169 |
16.07 |
| 2026-02-10 12:00 |
16:35:23.47 |
-22:52:51.9 |
HIP 81169 |
18.55 |
| 2026-02-11 00:00 |
16:35:39.03 |
-22:53:49.3 |
HIP 81169 |
21.38 |
| 2026-02-11 12:00 |
16:35:54.43 |
-22:54:46.3 |
HIP 81169 |
24.42 |
| 2026-02-12 00:00 |
16:36:09.66 |
-22:55:42.9 |
HIP 81169 |
27.58 |
| 2026-02-12 12:00 |
16:36:24.73 |
-22:56:39.1 |
HIP 81464 |
26.55 |
| 2026-02-13 00:00 |
16:36:39.62 |
-22:57:35.1 |
HIP 81464 |
23.29 |
| 2026-02-13 12:00 |
16:36:54.34 |
-22:58:30.6 |
HIP 81464 |
20.16 |
| 2026-02-14 00:00 |
16:37:08.89 |
-22:59:25.8 |
HIP 81464 |
17.23 |
| 2026-02-14 12:00 |
16:37:23.26 |
-23:00:20.6 |
HIP 81464 |
14.56 |
| 2026-02-15 00:00 |
16:37:37.46 |
-23:01:15.1 |
HIP 81464 |
12.31 |
| 2026-02-15 12:00 |
16:37:51.48 |
-23:02:09.2 |
HIP 81464 |
10.70 |
| 2026-02-16 00:00 |
16:38:05.33 |
-23:03:03.0 |
HIP 81464 |
10.01 |
| 2026-02-16 12:00 |
16:38:19.00 |
-23:03:56.4 |
HIP 81464 |
10.37 |
| 2026-02-17 00:00 |
16:38:32.49 |
-23:04:49.5 |
HIP 81464 |
11.66 |
| 2026-02-17 12:00 |
16:38:45.80 |
-23:05:42.2 |
HIP 81464 |
13.59 |
| 2026-02-18 00:00 |
16:38:58.92 |
-23:06:34.5 |
HIP 81464 |
15.89 |
| 2026-02-18 12:00 |
16:39:11.87 |
-23:07:26.6 |
HIP 81464 |
18.42 |
| 2026-02-19 00:00 |
16:39:24.63 |
-23:08:18.2 |
HIP 81464 |
21.06 |
| 2026-02-19 12:00 |
16:39:37.21 |
-23:09:09.5 |
HIP 81464 |
23.77 |
| 2026-02-20 00:00 |
16:39:49.60 |
-23:10:00.5 |
HIP 81688 |
21.44 |
| 2026-02-20 12:00 |
16:40:01.81 |
-23:10:51.2 |
HIP 81688 |
18.55 |
| 2026-02-21 00:00 |
16:40:13.83 |
-23:11:41.5 |
HIP 81688 |
15.73 |
| 2026-02-21 12:00 |
16:40:25.66 |
-23:12:31.4 |
HIP 81688 |
12.96 |
| 2026-02-22 00:00 |
16:40:37.30 |
-23:13:21.0 |
HIP 81688 |
10.29 |
| 2026-02-22 12:00 |
16:40:48.76 |
-23:14:10.3 |
HIP 81688 |
7.73 |
| 2026-02-23 00:00 |
16:41:00.02 |
-23:14:59.3 |
HIP 81688 |
5.41 |
| 2026-02-23 12:00 |
16:41:11.09 |
-23:15:47.9 |
HIP 81688 |
3.69 |
| 2026-02-24 00:00 |
16:41:21.97 |
-23:16:36.2 |
HIP 81688 |
3.46 |