| Parameter |
Value |
| Designation |
188P/LINEAR-Mueller |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-12-17T16:57:02.488320Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T15:25:41Z |
| Obs used |
1256 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-01-04.0000000 |
| e |
0.41643885 |
| q (au) |
2.554705 |
| a (au) |
4.377784 |
| i (deg) |
10.537674 |
| Ω (om, deg) |
359.121661 |
| ω (w, deg) |
26.667330 |
| M (ma, deg) |
159.068176 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.849 + 4.870\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.849 |
| n |
4.870 |
| 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) |
| 2026-07-29 00:00 |
04:42:45.91 |
+29:44:08.4 |
HIP 21804 |
22.35 |
| 2026-07-29 12:00 |
04:43:38.54 |
+29:47:04.5 |
HIP 21804 |
33.94 |
| 2026-07-30 00:00 |
04:44:31.08 |
+29:49:59.6 |
HIP 22108 |
29.67 |
| 2026-07-30 12:00 |
04:45:23.53 |
+29:52:53.8 |
HIP 22108 |
24.04 |
| 2026-07-31 00:00 |
04:46:15.89 |
+29:55:47.0 |
HIP 22108 |
23.45 |
| 2026-07-31 12:00 |
04:47:08.16 |
+29:58:39.3 |
HIP 22314 |
20.30 |
| 2026-08-01 00:00 |
04:48:00.34 |
+30:01:30.6 |
HIP 22314 |
15.89 |
| 2026-08-01 12:00 |
04:48:52.42 |
+30:04:20.9 |
HIP 22410 |
15.28 |
| 2026-08-02 00:00 |
04:49:44.40 |
+30:07:10.3 |
HIP 22410 |
12.37 |
| 2026-08-02 12:00 |
04:50:36.29 |
+30:09:58.8 |
HIP 22410 |
18.45 |
| 2026-08-03 00:00 |
04:51:28.08 |
+30:12:46.3 |
HIP 22677 |
18.36 |
| 2026-08-03 12:00 |
04:52:19.77 |
+30:15:33.0 |
HIP 22677 |
8.68 |
| 2026-08-04 00:00 |
04:53:11.35 |
+30:18:18.7 |
HIP 22677 |
8.80 |
| 2026-08-04 12:00 |
04:54:02.84 |
+30:21:03.5 |
HIP 22677 |
18.49 |
| 2026-08-05 00:00 |
04:54:54.22 |
+30:23:47.4 |
HIP 22910 |
14.49 |
| 2026-08-05 12:00 |
04:55:45.49 |
+30:26:30.3 |
HIP 22910 |
6.57 |
| 2026-08-06 00:00 |
04:56:36.66 |
+30:29:12.4 |
HIP 22925 |
9.36 |
| 2026-08-06 12:00 |
04:57:27.72 |
+30:31:53.6 |
HIP 23087 |
10.87 |
| 2026-08-07 00:00 |
04:58:18.67 |
+30:34:34.0 |
HIP 23087 |
4.35 |
| 2026-08-07 12:00 |
04:59:09.50 |
+30:37:13.4 |
HIP 23087 |
13.18 |
| 2026-08-08 00:00 |
05:00:00.22 |
+30:39:52.0 |
HIP 23302 |
16.61 |
| 2026-08-08 12:00 |
05:00:50.83 |
+30:42:29.7 |
HIP 23302 |
11.49 |
| 2026-08-09 00:00 |
05:01:41.31 |
+30:45:06.6 |
HIP 23302 |
15.42 |
| 2026-08-09 12:00 |
05:02:31.68 |
+30:47:42.6 |
HIP 23302 |
24.31 |
| 2026-08-10 00:00 |
05:03:21.93 |
+30:50:17.8 |
HIP 23583 |
23.52 |
| 2026-08-10 12:00 |
05:04:12.05 |
+30:52:52.2 |
HIP 23703 |
23.16 |
| 2026-08-11 00:00 |
05:05:02.05 |
+30:55:25.7 |
HIP 23703 |
17.53 |
| 2026-08-11 12:00 |
05:05:51.92 |
+30:57:58.4 |
HIP 23703 |
17.93 |
| 2026-08-12 00:00 |
05:06:41.66 |
+31:00:30.3 |
HIP 23914 |
22.90 |
| 2026-08-12 12:00 |
05:07:31.28 |
+31:03:01.4 |
HIP 23914 |
12.38 |
| 2026-08-13 00:00 |
05:08:20.76 |
+31:05:31.7 |
HIP 23914 |
4.55 |
| 2026-08-13 12:00 |
05:09:10.11 |
+31:08:01.2 |
HIP 23914 |
11.15 |
| 2026-08-14 00:00 |
05:09:59.32 |
+31:10:29.9 |
HIP 23914 |
21.49 |
| 2026-08-14 12:00 |
05:10:48.40 |
+31:12:57.9 |
HIP 24100 |
25.28 |
| 2026-08-15 00:00 |
05:11:37.33 |
+31:15:25.1 |
HIP 24295 |
21.39 |
| 2026-08-15 12:00 |
05:12:26.13 |
+31:17:51.5 |
HIP 24295 |
18.00 |
| 2026-08-16 00:00 |
05:13:14.79 |
+31:20:17.2 |
HIP 24388 |
16.60 |
| 2026-08-16 12:00 |
05:14:03.30 |
+31:22:42.1 |
HIP 24447 |
7.84 |
| 2026-08-17 00:00 |
05:14:51.67 |
+31:25:06.3 |
HIP 24447 |
2.79 |
| 2026-08-17 12:00 |
05:15:39.89 |
+31:27:29.8 |
HIP 24447 |
13.33 |
| 2026-08-18 00:00 |
05:16:27.97 |
+31:29:52.5 |
HIP 24641 |
16.96 |
| 2026-08-18 12:00 |
05:17:15.89 |
+31:32:14.6 |
HIP 24641 |
16.01 |
| 2026-08-19 00:00 |
05:18:03.67 |
+31:34:35.9 |
HIP 24662 |
16.39 |