| Parameter |
Value |
| Designation |
30P/Reinmuth 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-08-19T01:40:55.568640Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T14:15:16Z |
| Obs used |
2543 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
7.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-04-19.0000000 |
| e |
0.50225502 |
| q (au) |
1.876931 |
| a (au) |
3.770870 |
| i (deg) |
8.128534 |
| Ω (om, deg) |
119.715299 |
| ω (w, deg) |
13.245201 |
| M (ma, deg) |
294.440858 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.317 + 2.368\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.317 |
| n |
2.368 |
| gf |
0.999 |
| gb |
-0.504 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
18:22:05.14 |
-18:17:53.4 |
HIP 90055 |
18.57 |
| 2026-05-12 12:00 |
18:21:52.65 |
-18:17:55.9 |
HIP 90055 |
20.09 |
| 2026-05-13 00:00 |
18:21:39.95 |
-18:17:58.6 |
HIP 90055 |
21.95 |
| 2026-05-13 12:00 |
18:21:27.02 |
-18:18:01.6 |
HIP 90055 |
24.08 |
| 2026-05-14 00:00 |
18:21:13.88 |
-18:18:04.9 |
HIP 89992 |
25.20 |
| 2026-05-14 12:00 |
18:21:00.52 |
-18:18:08.6 |
HIP 89992 |
26.31 |
| 2026-05-15 00:00 |
18:20:46.95 |
-18:18:12.6 |
HIP 89992 |
27.77 |
| 2026-05-15 12:00 |
18:20:33.17 |
-18:18:16.8 |
HIP 89736 |
26.46 |
| 2026-05-16 00:00 |
18:20:19.18 |
-18:18:21.4 |
HIP 89736 |
23.34 |
| 2026-05-16 12:00 |
18:20:04.98 |
-18:18:26.3 |
HIP 89736 |
20.24 |
| 2026-05-17 00:00 |
18:19:50.58 |
-18:18:31.5 |
HIP 89736 |
17.20 |
| 2026-05-17 12:00 |
18:19:35.97 |
-18:18:37.0 |
HIP 89736 |
14.30 |
| 2026-05-18 00:00 |
18:19:21.16 |
-18:18:42.8 |
HIP 89736 |
11.68 |
| 2026-05-18 12:00 |
18:19:06.16 |
-18:18:48.9 |
HIP 89736 |
9.64 |
| 2026-05-19 00:00 |
18:18:50.96 |
-18:18:55.3 |
HIP 89736 |
8.65 |
| 2026-05-19 12:00 |
18:18:35.56 |
-18:19:02.0 |
HIP 89736 |
9.11 |
| 2026-05-20 00:00 |
18:18:19.98 |
-18:19:09.0 |
HIP 89736 |
10.89 |
| 2026-05-20 12:00 |
18:18:04.20 |
-18:19:16.3 |
HIP 89630 |
12.01 |
| 2026-05-21 00:00 |
18:17:48.24 |
-18:19:23.9 |
HIP 89630 |
9.62 |
| 2026-05-21 12:00 |
18:17:32.10 |
-18:19:31.8 |
HIP 89630 |
8.32 |
| 2026-05-22 00:00 |
18:17:15.77 |
-18:19:40.0 |
HIP 89630 |
8.69 |
| 2026-05-22 12:00 |
18:16:59.26 |
-18:19:48.5 |
HIP 89630 |
10.60 |
| 2026-05-23 00:00 |
18:16:42.58 |
-18:19:57.2 |
HIP 89630 |
13.44 |
| 2026-05-23 12:00 |
18:16:25.73 |
-18:20:06.3 |
HIP 89630 |
16.78 |
| 2026-05-24 00:00 |
18:16:08.70 |
-18:20:15.6 |
HIP 89529 |
16.79 |
| 2026-05-24 12:00 |
18:15:51.50 |
-18:20:25.2 |
HIP 89529 |
17.01 |
| 2026-05-25 00:00 |
18:15:34.14 |
-18:20:35.1 |
HIP 89529 |
18.19 |
| 2026-05-25 12:00 |
18:15:16.62 |
-18:20:45.2 |
HIP 89384 |
16.86 |
| 2026-05-26 00:00 |
18:14:58.93 |
-18:20:55.7 |
HIP 89384 |
14.28 |
| 2026-05-26 12:00 |
18:14:41.09 |
-18:21:06.4 |
HIP 89384 |
12.61 |
| 2026-05-27 00:00 |
18:14:23.09 |
-18:21:17.3 |
HIP 89384 |
12.25 |
| 2026-05-27 12:00 |
18:14:04.94 |
-18:21:28.5 |
HIP 89384 |
13.34 |
| 2026-05-28 00:00 |
18:13:46.64 |
-18:21:40.0 |
HIP 89384 |
15.62 |
| 2026-05-28 12:00 |
18:13:28.19 |
-18:21:51.8 |
HIP 89384 |
18.68 |
| 2026-05-29 00:00 |
18:13:09.60 |
-18:22:03.8 |
HIP 89158 |
19.66 |
| 2026-05-29 12:00 |
18:12:50.87 |
-18:22:16.0 |
HIP 89158 |
15.21 |
| 2026-05-30 00:00 |
18:12:32.00 |
-18:22:28.6 |
HIP 89158 |
10.73 |
| 2026-05-30 12:00 |
18:12:12.99 |
-18:22:41.3 |
HIP 89158 |
6.22 |
| 2026-05-31 00:00 |
18:11:53.85 |
-18:22:54.3 |
HIP 89158 |
1.68 |
| 2026-05-31 12:00 |
18:11:34.59 |
-18:23:07.6 |
HIP 89158 |
2.91 |
| 2026-06-01 00:00 |
18:11:15.19 |
-18:23:21.1 |
HIP 89158 |
7.51 |
| 2026-06-01 12:00 |
18:10:55.67 |
-18:23:34.8 |
HIP 89158 |
12.15 |
| 2026-06-02 00:00 |
18:10:36.03 |
-18:23:48.8 |
HIP 89158 |
16.81 |