190P/Mueller
| Parameter |
Value |
| Designation |
190P/Mueller |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-04-07T20:36:33.001920Z |
| Orbit solution date (soln_date, UTC) |
2025-10-28T16:12:51Z |
| Obs used |
693 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
7.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-06-09.0000000 |
| e |
0.52074444 |
| q (au) |
2.033193 |
| a (au) |
4.242397 |
| i (deg) |
2.172638 |
| Ω (om, deg) |
335.549249 |
| ω (w, deg) |
50.423154 |
| M (ma, deg) |
7.009181 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.974 + 2.817\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.974 |
| n |
2.817 |
| gf |
1.000 |
| gb |
-0.849 |
| 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) |
| 2026-02-03 00:00 |
09:05:42.32 |
+17:47:34.7 |
HIP 44637 |
24.18 |
| 2026-02-03 12:00 |
09:05:18.26 |
+17:49:05.2 |
HIP 44637 |
26.49 |
| 2026-02-04 00:00 |
09:04:54.25 |
+17:50:35.2 |
HIP 44529 |
27.24 |
| 2026-02-04 12:00 |
09:04:30.29 |
+17:52:04.7 |
HIP 44529 |
24.74 |
| 2026-02-05 00:00 |
09:04:06.37 |
+17:53:33.7 |
HIP 44529 |
23.48 |
| 2026-02-05 12:00 |
09:03:42.51 |
+17:55:02.2 |
HIP 44432 |
22.11 |
| 2026-02-06 00:00 |
09:03:18.71 |
+17:56:30.1 |
HIP 44432 |
22.20 |
| 2026-02-06 12:00 |
09:02:54.97 |
+17:57:57.5 |
HIP 44432 |
23.76 |
| 2026-02-07 00:00 |
09:02:31.31 |
+17:59:24.2 |
HIP 44432 |
26.53 |
| 2026-02-07 12:00 |
09:02:07.72 |
+18:00:50.4 |
HIP 44432 |
30.16 |
| 2026-02-08 00:00 |
09:01:44.21 |
+18:02:15.9 |
HIP 44432 |
34.36 |
| 2026-02-08 12:00 |
09:01:20.79 |
+18:03:40.8 |
HIP 44125 |
30.92 |
| 2026-02-09 00:00 |
09:00:57.46 |
+18:05:05.1 |
HIP 44125 |
25.41 |
| 2026-02-09 12:00 |
09:00:34.23 |
+18:06:28.6 |
HIP 44126 |
19.90 |
| 2026-02-10 00:00 |
09:00:11.10 |
+18:07:51.5 |
HIP 44126 |
14.34 |
| 2026-02-10 12:00 |
08:59:48.07 |
+18:09:13.6 |
HIP 44126 |
8.94 |
| 2026-02-11 00:00 |
08:59:25.16 |
+18:10:35.0 |
HIP 44126 |
4.23 |
| 2026-02-11 12:00 |
08:59:02.36 |
+18:11:55.7 |
HIP 44126 |
4.32 |
| 2026-02-12 00:00 |
08:58:39.69 |
+18:13:15.6 |
HIP 44056 |
7.29 |
| 2026-02-12 12:00 |
08:58:17.14 |
+18:14:34.8 |
HIP 44056 |
3.93 |
| 2026-02-13 00:00 |
08:57:54.72 |
+18:15:53.1 |
HIP 44056 |
6.18 |
| 2026-02-13 12:00 |
08:57:32.44 |
+18:17:10.6 |
HIP 44056 |
10.97 |
| 2026-02-14 00:00 |
08:57:10.29 |
+18:18:27.4 |
HIP 44056 |
16.14 |
| 2026-02-14 12:00 |
08:56:48.30 |
+18:19:43.2 |
HIP 44056 |
21.40 |
| 2026-02-15 00:00 |
08:56:26.45 |
+18:20:58.3 |
HIP 44056 |
26.66 |
| 2026-02-15 12:00 |
08:56:04.76 |
+18:22:12.4 |
HIP 44056 |
31.91 |
| 2026-02-16 00:00 |
08:55:43.22 |
+18:23:25.7 |
HIP 44056 |
37.13 |
| 2026-02-16 12:00 |
08:55:21.85 |
+18:24:38.2 |
HIP 44056 |
42.32 |
| 2026-02-17 00:00 |
08:55:00.65 |
+18:25:49.7 |
HIP 43846 |
47.44 |
| 2026-02-17 12:00 |
08:54:39.62 |
+18:27:00.2 |
HIP 43540 |
45.57 |
| 2026-02-18 00:00 |
08:54:18.77 |
+18:28:09.9 |
HIP 43540 |
40.93 |
| 2026-02-18 12:00 |
08:53:58.09 |
+18:29:18.6 |
HIP 43540 |
36.45 |
| 2026-02-19 00:00 |
08:53:37.60 |
+18:30:26.4 |
HIP 43540 |
32.17 |
| 2026-02-19 12:00 |
08:53:17.30 |
+18:31:33.2 |
HIP 43540 |
28.17 |
| 2026-02-20 00:00 |
08:52:57.20 |
+18:32:39.1 |
HIP 43540 |
24.55 |
| 2026-02-20 12:00 |
08:52:37.29 |
+18:33:44.0 |
HIP 43540 |
21.47 |
| 2026-02-21 00:00 |
08:52:17.58 |
+18:34:47.8 |
HIP 43540 |
19.15 |
| 2026-02-21 12:00 |
08:51:58.07 |
+18:35:50.7 |
HIP 43540 |
17.87 |
| 2026-02-22 00:00 |
08:51:38.78 |
+18:36:52.6 |
HIP 43540 |
17.78 |
| 2026-02-22 12:00 |
08:51:19.69 |
+18:37:53.5 |
HIP 43427 |
14.56 |
| 2026-02-23 00:00 |
08:51:00.82 |
+18:38:53.3 |
HIP 43427 |
11.65 |
| 2026-02-23 12:00 |
08:50:42.16 |
+18:39:52.1 |
HIP 43427 |
10.09 |
| 2026-02-24 00:00 |
08:50:23.73 |
+18:40:49.9 |
HIP 43427 |
10.42 |