373P/Rinner
| Parameter |
Value |
| Designation |
373P/Rinner |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-11-06T15:02:24.866880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:38Z |
| Obs used |
900 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
29.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-09-09T00:42:49.536000Z |
| Discovery magnitude (MPC) |
21.10 N |
| Discovery observatory (MPC) |
C10 · Maisoncelles |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-02-15.0000000 |
| e |
0.39368305 |
| q (au) |
2.305422 |
| a (au) |
3.802337 |
| i (deg) |
13.770595 |
| Ω (om, deg) |
232.018922 |
| ω (w, deg) |
221.217751 |
| M (ma, deg) |
110.515752 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.590 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.590 |
| n |
6.000 |
| gf |
0.953 |
| gb |
-0.934 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2018-09-09 |
2019-04-01 |
+24.9248 |
-9.799 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
00:38:07.49 |
+09:01:39.1 |
HIP 3017 |
25.71 |
| 2026-02-03 12:00 |
00:38:48.73 |
+09:03:55.6 |
HIP 3017 |
28.29 |
| 2026-02-04 00:00 |
00:39:30.11 |
+09:06:13.2 |
HIP 3215 |
26.31 |
| 2026-02-04 12:00 |
00:40:11.64 |
+09:08:31.9 |
HIP 3215 |
17.55 |
| 2026-02-05 00:00 |
00:40:53.31 |
+09:10:51.8 |
HIP 3236 |
11.42 |
| 2026-02-05 12:00 |
00:41:35.13 |
+09:13:12.7 |
HIP 3236 |
9.92 |
| 2026-02-06 00:00 |
00:42:17.09 |
+09:15:34.7 |
HIP 3236 |
17.06 |
| 2026-02-06 12:00 |
00:42:59.19 |
+09:17:57.8 |
HIP 3384 |
16.84 |
| 2026-02-07 00:00 |
00:43:41.44 |
+09:20:22.0 |
HIP 3384 |
21.63 |
| 2026-02-07 12:00 |
00:44:23.82 |
+09:22:47.2 |
HIP 3384 |
29.72 |
| 2026-02-08 00:00 |
00:45:06.35 |
+09:25:13.4 |
HIP 3384 |
39.14 |
| 2026-02-08 12:00 |
00:45:49.03 |
+09:27:40.6 |
HIP 3753 |
37.82 |
| 2026-02-09 00:00 |
00:46:31.84 |
+09:30:08.9 |
HIP 3753 |
29.66 |
| 2026-02-09 12:00 |
00:47:14.79 |
+09:32:38.1 |
HIP 3753 |
23.77 |
| 2026-02-10 00:00 |
00:47:57.88 |
+09:35:08.4 |
HIP 3799 |
19.81 |
| 2026-02-10 12:00 |
00:48:41.10 |
+09:37:39.6 |
HIP 3799 |
13.06 |
| 2026-02-11 00:00 |
00:49:24.47 |
+09:40:11.8 |
HIP 3799 |
13.74 |
| 2026-02-11 12:00 |
00:50:07.97 |
+09:42:44.9 |
HIP 3799 |
21.19 |
| 2026-02-12 00:00 |
00:50:51.61 |
+09:45:19.0 |
HIP 4120 |
28.56 |
| 2026-02-12 12:00 |
00:51:35.38 |
+09:47:54.0 |
HIP 4120 |
17.63 |
| 2026-02-13 00:00 |
00:52:19.29 |
+09:50:29.9 |
HIP 4120 |
7.18 |
| 2026-02-13 12:00 |
00:53:03.33 |
+09:53:06.6 |
HIP 4167 |
3.19 |
| 2026-02-14 00:00 |
00:53:47.51 |
+09:55:44.3 |
HIP 4167 |
8.26 |
| 2026-02-14 12:00 |
00:54:31.82 |
+09:58:22.9 |
HIP 4167 |
19.45 |
| 2026-02-15 00:00 |
00:55:16.27 |
+10:01:02.3 |
HIP 4431 |
23.31 |
| 2026-02-15 12:00 |
00:56:00.84 |
+10:03:42.6 |
HIP 4431 |
12.27 |
| 2026-02-16 00:00 |
00:56:45.55 |
+10:06:23.7 |
HIP 4431 |
3.58 |
| 2026-02-16 12:00 |
00:57:30.39 |
+10:09:05.6 |
HIP 4431 |
11.50 |
| 2026-02-17 00:00 |
00:58:15.35 |
+10:11:48.4 |
HIP 4431 |
22.61 |
| 2026-02-17 12:00 |
00:59:00.45 |
+10:14:31.9 |
HIP 4644 |
16.36 |
| 2026-02-18 00:00 |
00:59:45.67 |
+10:17:16.2 |
HIP 4644 |
10.91 |
| 2026-02-18 12:00 |
01:00:31.03 |
+10:20:01.3 |
HIP 4644 |
15.28 |
| 2026-02-19 00:00 |
01:01:16.50 |
+10:22:47.1 |
HIP 4823 |
19.99 |
| 2026-02-19 12:00 |
01:02:02.11 |
+10:25:33.7 |
HIP 4823 |
20.22 |
| 2026-02-20 00:00 |
01:02:47.84 |
+10:28:21.0 |
HIP 4823 |
26.21 |
| 2026-02-20 12:00 |
01:03:33.70 |
+10:31:09.0 |
HIP 5092 |
28.39 |
| 2026-02-21 00:00 |
01:04:19.68 |
+10:33:57.8 |
HIP 5092 |
21.79 |
| 2026-02-21 12:00 |
01:05:05.78 |
+10:36:47.2 |
HIP 5092 |
20.37 |
| 2026-02-22 00:00 |
01:05:52.01 |
+10:39:37.2 |
HIP 5092 |
25.09 |
| 2026-02-22 12:00 |
01:06:38.36 |
+10:42:28.0 |
HIP 5350 |
27.52 |
| 2026-02-23 00:00 |
01:07:24.83 |
+10:45:19.3 |
HIP 5350 |
15.83 |
| 2026-02-23 12:00 |
01:08:11.41 |
+10:48:11.3 |
HIP 5350 |
4.56 |
| 2026-02-24 00:00 |
01:08:58.12 |
+10:51:04.0 |
HIP 5422 |
4.80 |