| Parameter |
Value |
| Designation |
76P/West-Kohoutek-Ikemura |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-05-07T18:45:44.487360Z |
| Orbit solution date (soln_date, UTC) |
2026-05-29T11:31:18Z |
| Obs used |
963 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
7.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-11-28.0000000 |
| e |
0.53889844 |
| q (au) |
1.600203 |
| a (au) |
3.470391 |
| i (deg) |
30.483083 |
| Ω (om, deg) |
84.124220 |
| ω (w, deg) |
0.071296 |
| M (ma, deg) |
335.488311 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.527 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.527 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
06:20:13.95 |
+32:34:22.8 |
HIP 30222 |
18.83 |
| 2026-06-01 12:00 |
06:21:50.32 |
+32:38:28.1 |
HIP 30316 |
11.81 |
| 2026-06-02 00:00 |
06:23:26.76 |
+32:42:28.9 |
HIP 30316 |
11.33 |
| 2026-06-02 12:00 |
06:25:03.29 |
+32:46:25.2 |
HIP 30367 |
26.43 |
| 2026-06-03 00:00 |
06:26:39.90 |
+32:50:16.9 |
HIP 30751 |
18.26 |
| 2026-06-03 12:00 |
06:28:16.58 |
+32:54:04.1 |
HIP 30748 |
15.46 |
| 2026-06-04 00:00 |
06:29:53.33 |
+32:57:46.7 |
HIP 31054 |
16.84 |
| 2026-06-04 12:00 |
06:31:30.16 |
+33:01:24.8 |
HIP 31054 |
14.56 |
| 2026-06-05 00:00 |
06:33:07.05 |
+33:04:58.3 |
HIP 31290 |
8.25 |
| 2026-06-05 12:00 |
06:34:44.00 |
+33:08:27.3 |
HIP 31467 |
12.36 |
| 2026-06-06 00:00 |
06:36:21.02 |
+33:11:51.8 |
HIP 31585 |
11.99 |
| 2026-06-06 12:00 |
06:37:58.10 |
+33:15:11.7 |
HIP 31796 |
18.16 |
| 2026-06-07 00:00 |
06:39:35.23 |
+33:18:27.1 |
HIP 31796 |
19.52 |
| 2026-06-07 12:00 |
06:41:12.41 |
+33:21:38.0 |
HIP 31960 |
20.80 |
| 2026-06-08 00:00 |
06:42:49.64 |
+33:24:44.3 |
HIP 31960 |
34.60 |
| 2026-06-08 12:00 |
06:44:26.92 |
+33:27:46.1 |
HIP 32415 |
32.81 |
| 2026-06-09 00:00 |
06:46:04.25 |
+33:30:43.4 |
HIP 32519 |
21.80 |
| 2026-06-09 12:00 |
06:47:41.61 |
+33:33:36.2 |
HIP 32551 |
13.22 |
| 2026-06-10 00:00 |
06:49:19.02 |
+33:36:24.5 |
HIP 32636 |
16.86 |
| 2026-06-10 12:00 |
06:50:56.46 |
+33:39:08.2 |
HIP 33032 |
25.10 |
| 2026-06-11 00:00 |
06:52:33.93 |
+33:41:47.4 |
HIP 33032 |
4.79 |
| 2026-06-11 12:00 |
06:54:11.43 |
+33:44:22.2 |
HIP 33145 |
2.98 |
| 2026-06-12 00:00 |
06:55:48.95 |
+33:46:52.4 |
HIP 33421 |
16.05 |
| 2026-06-12 12:00 |
06:57:26.50 |
+33:49:18.2 |
HIP 33421 |
10.02 |
| 2026-06-13 00:00 |
06:59:04.07 |
+33:51:39.5 |
HIP 33585 |
10.29 |
| 2026-06-13 12:00 |
07:00:41.65 |
+33:53:56.4 |
HIP 33655 |
25.47 |
| 2026-06-14 00:00 |
07:02:19.24 |
+33:56:08.7 |
HIP 34043 |
17.61 |
| 2026-06-14 12:00 |
07:03:56.84 |
+33:58:16.7 |
HIP 34043 |
5.46 |
| 2026-06-15 00:00 |
07:05:34.45 |
+34:00:20.1 |
HIP 34247 |
16.58 |
| 2026-06-15 12:00 |
07:07:12.06 |
+34:02:19.2 |
HIP 34358 |
2.77 |
| 2026-06-16 00:00 |
07:08:49.67 |
+34:04:13.8 |
HIP 34497 |
8.22 |
| 2026-06-16 12:00 |
07:10:27.28 |
+34:06:04.1 |
HIP 34556 |
11.65 |
| 2026-06-17 00:00 |
07:12:04.87 |
+34:07:49.9 |
HIP 34812 |
4.06 |
| 2026-06-17 12:00 |
07:13:42.46 |
+34:09:31.4 |
HIP 34853 |
12.94 |
| 2026-06-18 00:00 |
07:15:20.03 |
+34:11:08.5 |
HIP 35256 |
22.19 |
| 2026-06-18 12:00 |
07:16:57.58 |
+34:12:41.2 |
HIP 35256 |
6.50 |
| 2026-06-19 00:00 |
07:18:35.10 |
+34:14:09.6 |
HIP 35256 |
20.25 |
| 2026-06-19 12:00 |
07:20:12.61 |
+34:15:33.6 |
HIP 35647 |
20.00 |
| 2026-06-20 00:00 |
07:21:50.08 |
+34:16:53.4 |
HIP 35647 |
16.36 |
| 2026-06-20 12:00 |
07:23:27.52 |
+34:18:08.8 |
HIP 35932 |
12.57 |
| 2026-06-21 00:00 |
07:25:04.93 |
+34:19:19.9 |
HIP 35932 |
9.68 |
| 2026-06-21 12:00 |
07:26:42.29 |
+34:20:26.8 |
HIP 36105 |
10.82 |
| 2026-06-22 00:00 |
07:28:19.62 |
+34:21:29.4 |
HIP 36335 |
6.92 |