| Parameter |
Value |
| Designation |
188P/LINEAR-Mueller |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-12-17T19:13:58.463040Z |
| Orbit solution date (soln_date, UTC) |
2026-09-28T16:26:40Z |
| Obs used |
1272 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-03-21.0000000 |
| e |
0.41632963 |
| q (au) |
2.555447 |
| a (au) |
4.378237 |
| i (deg) |
10.534831 |
| Ω (om, deg) |
359.116265 |
| ω (w, deg) |
26.690733 |
| M (ma, deg) |
167.317351 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.351 + 2.784\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.351 |
| n |
2.784 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-25 00:00 |
06:07:54.93 |
+34:07:50.8 |
HIP 29072 |
2.04 |
| 2026-09-25 12:00 |
06:08:26.05 |
+34:09:47.5 |
HIP 29072 |
5.92 |
| 2026-09-26 00:00 |
06:08:56.86 |
+34:11:44.3 |
HIP 29072 |
12.44 |
| 2026-09-26 12:00 |
06:09:27.37 |
+34:13:41.1 |
HIP 29242 |
8.17 |
| 2026-09-27 00:00 |
06:09:57.58 |
+34:15:38.0 |
HIP 29242 |
7.48 |
| 2026-09-27 12:00 |
06:10:27.48 |
+34:17:34.9 |
HIP 29308 |
4.05 |
| 2026-09-28 00:00 |
06:10:57.06 |
+34:19:31.9 |
HIP 29308 |
4.67 |
| 2026-09-28 12:00 |
06:11:26.33 |
+34:21:29.1 |
HIP 29308 |
10.41 |
| 2026-09-29 00:00 |
06:11:55.28 |
+34:23:26.3 |
HIP 29308 |
16.54 |
| 2026-09-29 12:00 |
06:12:23.92 |
+34:25:23.6 |
HIP 29308 |
22.70 |
| 2026-09-30 00:00 |
06:12:52.23 |
+34:27:21.0 |
HIP 29308 |
28.82 |
| 2026-09-30 12:00 |
06:13:20.22 |
+34:29:18.5 |
HIP 29308 |
34.90 |
| 2026-10-01 00:00 |
06:13:47.89 |
+34:31:16.2 |
HIP 29308 |
40.91 |
| 2026-10-01 12:00 |
06:14:15.22 |
+34:33:14.0 |
HIP 29835 |
38.08 |
| 2026-10-02 00:00 |
06:14:42.22 |
+34:35:12.0 |
HIP 29835 |
34.49 |
| 2026-10-02 12:00 |
06:15:08.89 |
+34:37:10.1 |
HIP 29835 |
31.64 |
| 2026-10-03 00:00 |
06:15:35.21 |
+34:39:08.3 |
HIP 29835 |
29.74 |
| 2026-10-03 12:00 |
06:16:01.20 |
+34:41:06.8 |
HIP 29835 |
28.91 |
| 2026-10-04 00:00 |
06:16:26.85 |
+34:43:05.4 |
HIP 29835 |
29.21 |
| 2026-10-04 12:00 |
06:16:52.14 |
+34:45:04.1 |
HIP 29882 |
25.35 |
| 2026-10-05 00:00 |
06:17:17.09 |
+34:47:03.1 |
HIP 29882 |
22.16 |
| 2026-10-05 12:00 |
06:17:41.69 |
+34:49:02.2 |
HIP 29882 |
19.98 |
| 2026-10-06 00:00 |
06:18:05.93 |
+34:51:01.6 |
HIP 29882 |
19.10 |
| 2026-10-06 12:00 |
06:18:29.82 |
+34:53:01.1 |
HIP 30056 |
19.57 |
| 2026-10-07 00:00 |
06:18:53.34 |
+34:55:00.8 |
HIP 30002 |
17.47 |
| 2026-10-07 12:00 |
06:19:16.51 |
+34:57:00.8 |
HIP 30002 |
16.15 |
| 2026-10-08 00:00 |
06:19:39.30 |
+34:59:00.9 |
HIP 30002 |
16.36 |
| 2026-10-08 12:00 |
06:20:01.73 |
+35:01:01.3 |
HIP 30002 |
18.00 |
| 2026-10-09 00:00 |
06:20:23.79 |
+35:03:01.9 |
HIP 30002 |
20.67 |
| 2026-10-09 12:00 |
06:20:45.48 |
+35:05:02.7 |
HIP 30002 |
24.00 |
| 2026-10-10 00:00 |
06:21:06.79 |
+35:07:03.8 |
HIP 30002 |
27.70 |
| 2026-10-10 12:00 |
06:21:27.73 |
+35:09:05.0 |
HIP 30373 |
30.86 |
| 2026-10-11 00:00 |
06:21:48.28 |
+35:11:06.5 |
HIP 30373 |
26.53 |
| 2026-10-11 12:00 |
06:22:08.45 |
+35:13:08.2 |
HIP 30373 |
22.38 |
| 2026-10-12 00:00 |
06:22:28.24 |
+35:15:10.2 |
HIP 30373 |
18.48 |
| 2026-10-12 12:00 |
06:22:47.64 |
+35:17:12.3 |
HIP 30373 |
14.95 |
| 2026-10-13 00:00 |
06:23:06.65 |
+35:19:14.8 |
HIP 30373 |
12.05 |
| 2026-10-13 12:00 |
06:23:25.27 |
+35:21:17.4 |
HIP 30373 |
10.23 |
| 2026-10-14 00:00 |
06:23:43.50 |
+35:23:20.3 |
HIP 30373 |
10.02 |
| 2026-10-14 12:00 |
06:24:01.33 |
+35:25:23.4 |
HIP 30373 |
11.41 |
| 2026-10-15 00:00 |
06:24:18.77 |
+35:27:26.7 |
HIP 30497 |
12.82 |
| 2026-10-15 12:00 |
06:24:35.81 |
+35:29:30.3 |
HIP 30497 |
14.21 |
| 2026-10-16 00:00 |
06:24:52.44 |
+35:31:34.1 |
HIP 30497 |
16.49 |