44P/Reinmuth 2
| Parameter |
Value |
| Designation |
44P/Reinmuth 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-04-23T16:37:41.194560Z |
| Orbit solution date (soln_date, UTC) |
2024-03-20T08:30:40Z |
| Obs used |
1496 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
5.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-03-31.0000000 |
| e |
0.42698572 |
| q (au) |
2.113823 |
| a (au) |
3.688953 |
| i (deg) |
5.898445 |
| Ω (om, deg) |
286.481266 |
| ω (w, deg) |
58.123620 |
| M (ma, deg) |
255.155949 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.126 + 2.675\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.126 |
| n |
2.675 |
| gf |
0.994 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.992 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
11:40:19.35 |
-04:35:25.6 |
HIP 56907 |
22.94 |
| 2026-02-03 12:00 |
11:40:08.70 |
-04:34:53.7 |
HIP 56907 |
22.94 |
| 2026-02-04 00:00 |
11:39:57.89 |
-04:34:20.5 |
HIP 56907 |
23.28 |
| 2026-02-04 12:00 |
11:39:46.91 |
-04:33:46.0 |
HIP 56907 |
23.96 |
| 2026-02-05 00:00 |
11:39:35.77 |
-04:33:10.2 |
HIP 56907 |
24.96 |
| 2026-02-05 12:00 |
11:39:24.47 |
-04:32:33.2 |
HIP 56848 |
24.35 |
| 2026-02-06 00:00 |
11:39:13.01 |
-04:31:54.9 |
HIP 56848 |
23.73 |
| 2026-02-06 12:00 |
11:39:01.39 |
-04:31:15.2 |
HIP 56699 |
21.91 |
| 2026-02-07 00:00 |
11:38:49.61 |
-04:30:34.4 |
HIP 56699 |
18.96 |
| 2026-02-07 12:00 |
11:38:37.67 |
-04:29:52.2 |
HIP 56699 |
15.99 |
| 2026-02-08 00:00 |
11:38:25.58 |
-04:29:08.8 |
HIP 56699 |
13.02 |
| 2026-02-08 12:00 |
11:38:13.34 |
-04:28:24.2 |
HIP 56699 |
10.10 |
| 2026-02-09 00:00 |
11:38:00.94 |
-04:27:38.2 |
HIP 56699 |
7.33 |
| 2026-02-09 12:00 |
11:37:48.39 |
-04:26:51.1 |
HIP 56699 |
5.07 |
| 2026-02-10 00:00 |
11:37:35.69 |
-04:26:02.7 |
HIP 56699 |
4.31 |
| 2026-02-10 12:00 |
11:37:22.85 |
-04:25:13.0 |
HIP 56699 |
5.76 |
| 2026-02-11 00:00 |
11:37:09.85 |
-04:24:22.1 |
HIP 56699 |
8.38 |
| 2026-02-11 12:00 |
11:36:56.72 |
-04:23:30.0 |
HIP 56699 |
11.44 |
| 2026-02-12 00:00 |
11:36:43.44 |
-04:22:36.6 |
HIP 56699 |
14.68 |
| 2026-02-12 12:00 |
11:36:30.02 |
-04:21:42.1 |
HIP 56699 |
18.03 |
| 2026-02-13 00:00 |
11:36:16.46 |
-04:20:46.3 |
HIP 56500 |
19.35 |
| 2026-02-13 12:00 |
11:36:02.77 |
-04:19:49.3 |
HIP 56500 |
16.02 |
| 2026-02-14 00:00 |
11:35:48.94 |
-04:18:51.1 |
HIP 56500 |
12.78 |
| 2026-02-14 12:00 |
11:35:34.97 |
-04:17:51.8 |
HIP 56500 |
9.76 |
| 2026-02-15 00:00 |
11:35:20.88 |
-04:16:51.2 |
HIP 56500 |
7.29 |
| 2026-02-15 12:00 |
11:35:06.65 |
-04:15:49.5 |
HIP 56500 |
6.15 |
| 2026-02-16 00:00 |
11:34:52.30 |
-04:14:46.6 |
HIP 56500 |
7.09 |
| 2026-02-16 12:00 |
11:34:37.83 |
-04:13:42.6 |
HIP 56419 |
9.22 |
| 2026-02-17 00:00 |
11:34:23.23 |
-04:12:37.4 |
HIP 56419 |
5.47 |
| 2026-02-17 12:00 |
11:34:08.51 |
-04:11:31.1 |
HIP 56419 |
1.91 |
| 2026-02-18 00:00 |
11:33:53.67 |
-04:10:23.7 |
HIP 56419 |
2.62 |
| 2026-02-18 12:00 |
11:33:38.72 |
-04:09:15.1 |
HIP 56419 |
6.36 |
| 2026-02-19 00:00 |
11:33:23.65 |
-04:08:05.5 |
HIP 56419 |
10.25 |
| 2026-02-19 12:00 |
11:33:08.47 |
-04:06:54.7 |
HIP 56419 |
14.19 |
| 2026-02-20 00:00 |
11:32:53.18 |
-04:05:42.9 |
HIP 56419 |
18.18 |
| 2026-02-20 12:00 |
11:32:37.79 |
-04:04:30.0 |
HIP 56419 |
22.19 |
| 2026-02-21 00:00 |
11:32:22.29 |
-04:03:16.1 |
HIP 56419 |
26.24 |
| 2026-02-21 12:00 |
11:32:06.69 |
-04:02:01.1 |
HIP 56419 |
30.33 |
| 2026-02-22 00:00 |
11:31:50.99 |
-04:00:45.1 |
HIP 56419 |
34.44 |
| 2026-02-22 12:00 |
11:31:35.20 |
-03:59:28.0 |
HIP 56419 |
38.58 |
| 2026-02-23 00:00 |
11:31:19.31 |
-03:58:10.0 |
HIP 56049 |
42.49 |
| 2026-02-23 12:00 |
11:31:03.33 |
-03:56:50.9 |
HIP 56049 |
40.63 |
| 2026-02-24 00:00 |
11:30:47.26 |
-03:55:30.9 |
HIP 56049 |
39.14 |