| 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) |
| 2026-05-12 00:00 |
03:28:48.35 |
+18:12:59.2 |
HIP 16271 |
34.29 |
| 2026-05-12 12:00 |
03:29:49.31 |
+18:15:05.1 |
HIP 16414 |
28.80 |
| 2026-05-13 00:00 |
03:30:50.34 |
+18:17:09.9 |
HIP 16414 |
22.12 |
| 2026-05-13 12:00 |
03:31:51.44 |
+18:19:13.5 |
HIP 16414 |
24.04 |
| 2026-05-14 00:00 |
03:32:52.60 |
+18:21:16.0 |
HIP 16613 |
15.28 |
| 2026-05-14 12:00 |
03:33:53.82 |
+18:23:17.3 |
HIP 16613 |
9.70 |
| 2026-05-15 00:00 |
03:34:55.12 |
+18:25:17.4 |
HIP 16613 |
19.63 |
| 2026-05-15 12:00 |
03:35:56.47 |
+18:27:16.3 |
HIP 16811 |
8.43 |
| 2026-05-16 00:00 |
03:36:57.89 |
+18:29:14.0 |
HIP 16896 |
8.81 |
| 2026-05-16 12:00 |
03:37:59.37 |
+18:31:10.5 |
HIP 16944 |
2.48 |
| 2026-05-17 00:00 |
03:39:00.92 |
+18:33:05.7 |
HIP 17076 |
12.61 |
| 2026-05-17 12:00 |
03:40:02.52 |
+18:34:59.8 |
HIP 17076 |
13.72 |
| 2026-05-18 00:00 |
03:41:04.19 |
+18:36:52.5 |
HIP 17076 |
25.53 |
| 2026-05-18 12:00 |
03:42:05.91 |
+18:38:44.1 |
HIP 17282 |
26.41 |
| 2026-05-19 00:00 |
03:43:07.69 |
+18:40:34.3 |
HIP 17421 |
17.57 |
| 2026-05-19 12:00 |
03:44:09.54 |
+18:42:23.3 |
HIP 17421 |
11.78 |
| 2026-05-20 00:00 |
03:45:11.44 |
+18:44:11.0 |
HIP 17586 |
15.54 |
| 2026-05-20 12:00 |
03:46:13.40 |
+18:45:57.4 |
HIP 17586 |
12.31 |
| 2026-05-21 00:00 |
03:47:15.41 |
+18:47:42.5 |
HIP 17740 |
12.63 |
| 2026-05-21 12:00 |
03:48:17.48 |
+18:49:26.3 |
HIP 17740 |
10.78 |
| 2026-05-22 00:00 |
03:49:19.60 |
+18:51:08.8 |
HIP 17740 |
22.60 |
| 2026-05-22 12:00 |
03:50:21.78 |
+18:52:49.9 |
HIP 17961 |
22.43 |
| 2026-05-23 00:00 |
03:51:24.02 |
+18:54:29.7 |
HIP 18110 |
12.93 |
| 2026-05-23 12:00 |
03:52:26.31 |
+18:56:08.2 |
HIP 18110 |
2.11 |
| 2026-05-24 00:00 |
03:53:28.65 |
+18:57:45.3 |
HIP 18110 |
16.77 |
| 2026-05-24 12:00 |
03:54:31.04 |
+18:59:21.0 |
HIP 18326 |
25.28 |
| 2026-05-25 00:00 |
03:55:33.48 |
+19:00:55.4 |
HIP 18409 |
15.27 |
| 2026-05-25 12:00 |
03:56:35.98 |
+19:02:28.4 |
HIP 18409 |
12.93 |
| 2026-05-26 00:00 |
03:57:38.53 |
+19:04:00.0 |
HIP 18506 |
22.69 |
| 2026-05-26 12:00 |
03:58:41.13 |
+19:05:30.2 |
HIP 18643 |
27.83 |
| 2026-05-27 00:00 |
03:59:43.77 |
+19:06:59.1 |
HIP 18643 |
27.55 |
| 2026-05-27 12:00 |
04:00:46.47 |
+19:08:26.5 |
HIP 18820 |
27.31 |
| 2026-05-28 00:00 |
04:01:49.22 |
+19:09:52.5 |
HIP 18820 |
22.78 |
| 2026-05-28 12:00 |
04:02:52.02 |
+19:11:17.1 |
HIP 18946 |
19.48 |
| 2026-05-29 00:00 |
04:03:54.86 |
+19:12:40.2 |
HIP 18946 |
15.11 |
| 2026-05-29 12:00 |
04:04:57.75 |
+19:14:01.9 |
HIP 19082 |
14.12 |
| 2026-05-30 00:00 |
04:06:00.69 |
+19:15:22.2 |
HIP 19175 |
10.65 |
| 2026-05-30 12:00 |
04:07:03.68 |
+19:16:41.0 |
HIP 19175 |
9.75 |
| 2026-05-31 00:00 |
04:08:06.71 |
+19:17:58.3 |
HIP 19175 |
22.85 |
| 2026-05-31 12:00 |
04:09:09.79 |
+19:19:14.2 |
HIP 19388 |
17.32 |
| 2026-06-01 00:00 |
04:10:12.92 |
+19:20:28.7 |
HIP 19388 |
21.89 |
| 2026-06-01 12:00 |
04:11:16.09 |
+19:21:41.6 |
HIP 19669 |
24.36 |
| 2026-06-02 00:00 |
04:12:19.30 |
+19:22:53.0 |
HIP 19669 |
11.76 |