| Parameter |
Value |
| Designation |
190P/Mueller |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-04-07T20:17:42.864000Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:30Z |
| Obs used |
714 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
6.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-09-09.0000000 |
| e |
0.52067780 |
| q (au) |
2.033166 |
| a (au) |
4.241753 |
| i (deg) |
2.172645 |
| Ω (om, deg) |
335.546737 |
| ω (w, deg) |
50.421023 |
| M (ma, deg) |
17.391691 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.260 + 2.459\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.260 |
| n |
2.459 |
| gf |
1.000 |
| gb |
-0.852 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
09:07:38.41 |
+16:48:32.7 |
HIP 44773 |
12.09 |
| 2026-06-01 12:00 |
09:08:01.27 |
+16:46:44.9 |
HIP 44870 |
9.15 |
| 2026-06-02 00:00 |
09:08:24.23 |
+16:44:56.6 |
HIP 44870 |
3.71 |
| 2026-06-02 12:00 |
09:08:47.28 |
+16:43:07.7 |
HIP 44870 |
3.29 |
| 2026-06-03 00:00 |
09:09:10.41 |
+16:41:18.3 |
HIP 44870 |
8.71 |
| 2026-06-03 12:00 |
09:09:33.64 |
+16:39:28.3 |
HIP 44870 |
14.48 |
| 2026-06-04 00:00 |
09:09:56.96 |
+16:37:37.8 |
HIP 44870 |
20.32 |
| 2026-06-04 12:00 |
09:10:20.37 |
+16:35:46.7 |
HIP 44894 |
24.31 |
| 2026-06-05 00:00 |
09:10:43.86 |
+16:33:55.1 |
HIP 45201 |
27.96 |
| 2026-06-05 12:00 |
09:11:07.44 |
+16:32:03.0 |
HIP 45201 |
22.22 |
| 2026-06-06 00:00 |
09:11:31.10 |
+16:30:10.3 |
HIP 45201 |
16.59 |
| 2026-06-06 12:00 |
09:11:54.86 |
+16:28:17.0 |
HIP 45201 |
11.31 |
| 2026-06-07 00:00 |
09:12:18.69 |
+16:26:23.2 |
HIP 45201 |
7.25 |
| 2026-06-07 12:00 |
09:12:42.61 |
+16:24:28.9 |
HIP 45201 |
7.04 |
| 2026-06-08 00:00 |
09:13:06.60 |
+16:22:34.1 |
HIP 45201 |
10.96 |
| 2026-06-08 12:00 |
09:13:30.68 |
+16:20:38.7 |
HIP 45201 |
16.27 |
| 2026-06-09 00:00 |
09:13:54.84 |
+16:18:42.8 |
HIP 45201 |
22.01 |
| 2026-06-09 12:00 |
09:14:19.08 |
+16:16:46.4 |
HIP 45387 |
18.94 |
| 2026-06-10 00:00 |
09:14:43.40 |
+16:14:49.4 |
HIP 45387 |
14.95 |
| 2026-06-10 12:00 |
09:15:07.79 |
+16:12:51.9 |
HIP 45387 |
12.81 |
| 2026-06-11 00:00 |
09:15:32.26 |
+16:10:53.9 |
HIP 45387 |
13.46 |
| 2026-06-11 12:00 |
09:15:56.81 |
+16:08:55.4 |
HIP 45387 |
16.60 |
| 2026-06-12 00:00 |
09:16:21.43 |
+16:06:56.3 |
HIP 45387 |
21.16 |
| 2026-06-12 12:00 |
09:16:46.12 |
+16:04:56.8 |
HIP 45387 |
26.44 |
| 2026-06-13 00:00 |
09:17:10.89 |
+16:02:56.7 |
HIP 45579 |
30.25 |
| 2026-06-13 12:00 |
09:17:35.73 |
+16:00:56.1 |
HIP 45579 |
32.31 |
| 2026-06-14 00:00 |
09:18:00.64 |
+15:58:55.0 |
HIP 45777 |
29.18 |
| 2026-06-14 12:00 |
09:18:25.62 |
+15:56:53.4 |
HIP 45777 |
23.06 |
| 2026-06-15 00:00 |
09:18:50.67 |
+15:54:51.3 |
HIP 45777 |
17.09 |
| 2026-06-15 12:00 |
09:19:15.78 |
+15:52:48.7 |
HIP 45777 |
11.52 |
| 2026-06-16 00:00 |
09:19:40.97 |
+15:50:45.6 |
HIP 45777 |
7.39 |
| 2026-06-16 12:00 |
09:20:06.21 |
+15:48:42.0 |
HIP 45777 |
7.63 |
| 2026-06-17 00:00 |
09:20:31.53 |
+15:46:37.9 |
HIP 45777 |
12.02 |
| 2026-06-17 12:00 |
09:20:56.90 |
+15:44:33.3 |
HIP 45777 |
17.72 |
| 2026-06-18 00:00 |
09:21:22.34 |
+15:42:28.2 |
HIP 45874 |
20.26 |
| 2026-06-18 12:00 |
09:21:47.85 |
+15:40:22.7 |
HIP 45989 |
15.36 |
| 2026-06-19 00:00 |
09:22:13.41 |
+15:38:16.7 |
HIP 45989 |
11.47 |
| 2026-06-19 12:00 |
09:22:39.03 |
+15:36:10.2 |
HIP 45989 |
10.58 |
| 2026-06-20 00:00 |
09:23:04.71 |
+15:34:03.2 |
HIP 45989 |
13.32 |
| 2026-06-20 12:00 |
09:23:30.44 |
+15:31:55.8 |
HIP 45989 |
18.14 |
| 2026-06-21 00:00 |
09:23:56.24 |
+15:29:47.9 |
HIP 45989 |
23.81 |
| 2026-06-21 12:00 |
09:24:22.09 |
+15:27:39.6 |
HIP 45989 |
29.87 |
| 2026-06-22 00:00 |
09:24:47.99 |
+15:25:30.8 |
HIP 46318 |
32.87 |