| Parameter |
Value |
| Designation |
C/2004 K3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-06-30T10:56:55.377600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:41Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
45.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2004-06-11.0000000 |
| e |
0.98101532 |
| q (au) |
1.103356 |
| a (au) |
58.118234 |
| i (deg) |
111.928474 |
| Ω (om, deg) |
275.537408 |
| ω (w, deg) |
60.490968 |
| M (ma, deg) |
359.956719 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.914 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.914 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
05:18:58.23 |
-18:06:42.2 |
HIP 24786 |
2.20 |
| 2026-09-20 12:00 |
05:18:57.77 |
-18:07:13.1 |
HIP 24786 |
1.89 |
| 2026-09-21 00:00 |
05:18:57.29 |
-18:07:44.0 |
HIP 24786 |
1.68 |
| 2026-09-21 12:00 |
05:18:56.78 |
-18:08:14.9 |
HIP 24786 |
1.62 |
| 2026-09-22 00:00 |
05:18:56.25 |
-18:08:45.8 |
HIP 24786 |
1.72 |
| 2026-09-22 12:00 |
05:18:55.69 |
-18:09:16.7 |
HIP 24786 |
1.96 |
| 2026-09-23 00:00 |
05:18:55.10 |
-18:09:47.5 |
HIP 24786 |
2.29 |
| 2026-09-23 12:00 |
05:18:54.49 |
-18:10:18.4 |
HIP 24786 |
2.69 |
| 2026-09-24 00:00 |
05:18:53.85 |
-18:10:49.2 |
HIP 24786 |
3.13 |
| 2026-09-24 12:00 |
05:18:53.19 |
-18:11:20.0 |
HIP 24786 |
3.59 |
| 2026-09-25 00:00 |
05:18:52.49 |
-18:11:50.8 |
HIP 24786 |
4.07 |
| 2026-09-25 12:00 |
05:18:51.78 |
-18:12:21.6 |
HIP 24786 |
4.56 |
| 2026-09-26 00:00 |
05:18:51.03 |
-18:12:52.4 |
HIP 24786 |
5.06 |
| 2026-09-26 12:00 |
05:18:50.26 |
-18:13:23.1 |
HIP 24786 |
5.57 |
| 2026-09-27 00:00 |
05:18:49.46 |
-18:13:53.8 |
HIP 24786 |
6.09 |
| 2026-09-27 12:00 |
05:18:48.64 |
-18:14:24.5 |
HIP 24786 |
6.61 |
| 2026-09-28 00:00 |
05:18:47.79 |
-18:14:55.1 |
HIP 24786 |
7.13 |
| 2026-09-28 12:00 |
05:18:46.91 |
-18:15:25.7 |
HIP 24786 |
7.66 |
| 2026-09-29 00:00 |
05:18:46.01 |
-18:15:56.3 |
HIP 24786 |
8.19 |
| 2026-09-29 12:00 |
05:18:45.08 |
-18:16:26.8 |
HIP 24786 |
8.72 |
| 2026-09-30 00:00 |
05:18:44.13 |
-18:16:57.3 |
HIP 24786 |
9.26 |
| 2026-09-30 12:00 |
05:18:43.15 |
-18:17:27.7 |
HIP 24786 |
9.80 |
| 2026-10-01 00:00 |
05:18:42.14 |
-18:17:58.1 |
HIP 24786 |
10.34 |
| 2026-10-01 12:00 |
05:18:41.11 |
-18:18:28.5 |
HIP 24786 |
10.88 |
| 2026-10-02 00:00 |
05:18:40.05 |
-18:18:58.8 |
HIP 24786 |
11.43 |
| 2026-10-02 12:00 |
05:18:38.96 |
-18:19:29.1 |
HIP 24786 |
11.98 |
| 2026-10-03 00:00 |
05:18:37.85 |
-18:19:59.3 |
HIP 24786 |
12.53 |
| 2026-10-03 12:00 |
05:18:36.71 |
-18:20:29.4 |
HIP 24786 |
13.08 |
| 2026-10-04 00:00 |
05:18:35.55 |
-18:20:59.5 |
HIP 24786 |
13.63 |
| 2026-10-04 12:00 |
05:18:34.36 |
-18:21:29.5 |
HIP 24827 |
13.83 |
| 2026-10-05 00:00 |
05:18:33.15 |
-18:21:59.5 |
HIP 24827 |
13.73 |
| 2026-10-05 12:00 |
05:18:31.91 |
-18:22:29.4 |
HIP 24827 |
13.66 |
| 2026-10-06 00:00 |
05:18:30.65 |
-18:22:59.3 |
HIP 24827 |
13.61 |
| 2026-10-06 12:00 |
05:18:29.35 |
-18:23:29.0 |
HIP 24827 |
13.60 |
| 2026-10-07 00:00 |
05:18:28.04 |
-18:23:58.7 |
HIP 24827 |
13.63 |
| 2026-10-07 12:00 |
05:18:26.70 |
-18:24:28.3 |
HIP 24827 |
13.68 |
| 2026-10-08 00:00 |
05:18:25.33 |
-18:24:57.9 |
HIP 24707 |
13.14 |
| 2026-10-08 12:00 |
05:18:23.94 |
-18:25:27.4 |
HIP 24707 |
12.55 |
| 2026-10-09 00:00 |
05:18:22.52 |
-18:25:56.8 |
HIP 24707 |
11.97 |
| 2026-10-09 12:00 |
05:18:21.07 |
-18:26:26.1 |
HIP 24707 |
11.38 |
| 2026-10-10 00:00 |
05:18:19.61 |
-18:26:55.3 |
HIP 24707 |
10.79 |
| 2026-10-10 12:00 |
05:18:18.11 |
-18:27:24.4 |
HIP 24707 |
10.20 |
| 2026-10-11 00:00 |
05:18:16.60 |
-18:27:53.4 |
HIP 24707 |
9.62 |