| 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) |
| 2026-07-29 00:00 |
05:17:23.82 |
-17:18:46.9 |
HIP 24721 |
10.82 |
| 2026-07-29 12:00 |
05:17:25.87 |
-17:19:07.0 |
HIP 24721 |
10.25 |
| 2026-07-30 00:00 |
05:17:27.90 |
-17:19:27.4 |
HIP 24721 |
9.69 |
| 2026-07-30 12:00 |
05:17:29.91 |
-17:19:47.9 |
HIP 24721 |
9.14 |
| 2026-07-31 00:00 |
05:17:31.91 |
-17:20:08.6 |
HIP 24721 |
8.60 |
| 2026-07-31 12:00 |
05:17:33.89 |
-17:20:29.5 |
HIP 24721 |
8.06 |
| 2026-08-01 00:00 |
05:17:35.85 |
-17:20:50.6 |
HIP 24721 |
7.54 |
| 2026-08-01 12:00 |
05:17:37.79 |
-17:21:11.8 |
HIP 24721 |
7.03 |
| 2026-08-02 00:00 |
05:17:39.71 |
-17:21:33.2 |
HIP 24721 |
6.54 |
| 2026-08-02 12:00 |
05:17:41.62 |
-17:21:54.8 |
HIP 24721 |
6.07 |
| 2026-08-03 00:00 |
05:17:43.50 |
-17:22:16.6 |
HIP 24721 |
5.62 |
| 2026-08-03 12:00 |
05:17:45.37 |
-17:22:38.5 |
HIP 24721 |
5.21 |
| 2026-08-04 00:00 |
05:17:47.21 |
-17:23:00.6 |
HIP 24721 |
4.83 |
| 2026-08-04 12:00 |
05:17:49.04 |
-17:23:22.9 |
HIP 24721 |
4.50 |
| 2026-08-05 00:00 |
05:17:50.85 |
-17:23:45.4 |
HIP 24721 |
4.22 |
| 2026-08-05 12:00 |
05:17:52.64 |
-17:24:08.0 |
HIP 24721 |
4.02 |
| 2026-08-06 00:00 |
05:17:54.40 |
-17:24:30.8 |
HIP 24721 |
3.89 |
| 2026-08-06 12:00 |
05:17:56.15 |
-17:24:53.7 |
HIP 24721 |
3.85 |
| 2026-08-07 00:00 |
05:17:57.88 |
-17:25:16.8 |
HIP 24721 |
3.90 |
| 2026-08-07 12:00 |
05:17:59.59 |
-17:25:40.1 |
HIP 24721 |
4.03 |
| 2026-08-08 00:00 |
05:18:01.27 |
-17:26:03.6 |
HIP 24721 |
4.24 |
| 2026-08-08 12:00 |
05:18:02.94 |
-17:26:27.2 |
HIP 24721 |
4.51 |
| 2026-08-09 00:00 |
05:18:04.59 |
-17:26:50.9 |
HIP 24721 |
4.83 |
| 2026-08-09 12:00 |
05:18:06.21 |
-17:27:14.9 |
HIP 24721 |
5.20 |
| 2026-08-10 00:00 |
05:18:07.82 |
-17:27:38.9 |
HIP 24721 |
5.60 |
| 2026-08-10 12:00 |
05:18:09.40 |
-17:28:03.2 |
HIP 24721 |
6.03 |
| 2026-08-11 00:00 |
05:18:10.96 |
-17:28:27.6 |
HIP 24721 |
6.48 |
| 2026-08-11 12:00 |
05:18:12.50 |
-17:28:52.1 |
HIP 24721 |
6.94 |
| 2026-08-12 00:00 |
05:18:14.02 |
-17:29:16.8 |
HIP 24721 |
7.42 |
| 2026-08-12 12:00 |
05:18:15.52 |
-17:29:41.6 |
HIP 24721 |
7.90 |
| 2026-08-13 00:00 |
05:18:16.99 |
-17:30:06.6 |
HIP 24781 |
8.19 |
| 2026-08-13 12:00 |
05:18:18.44 |
-17:30:31.7 |
HIP 24781 |
7.67 |
| 2026-08-14 00:00 |
05:18:19.88 |
-17:30:57.0 |
HIP 24781 |
7.17 |
| 2026-08-14 12:00 |
05:18:21.28 |
-17:31:22.4 |
HIP 24781 |
6.68 |
| 2026-08-15 00:00 |
05:18:22.67 |
-17:31:48.0 |
HIP 24781 |
6.19 |
| 2026-08-15 12:00 |
05:18:24.03 |
-17:32:13.7 |
HIP 24781 |
5.73 |
| 2026-08-16 00:00 |
05:18:25.37 |
-17:32:39.5 |
HIP 24781 |
5.28 |
| 2026-08-16 12:00 |
05:18:26.69 |
-17:33:05.5 |
HIP 24781 |
4.85 |
| 2026-08-17 00:00 |
05:18:27.99 |
-17:33:31.6 |
HIP 24781 |
4.45 |
| 2026-08-17 12:00 |
05:18:29.26 |
-17:33:57.8 |
HIP 24781 |
4.09 |
| 2026-08-18 00:00 |
05:18:30.51 |
-17:34:24.2 |
HIP 24781 |
3.77 |
| 2026-08-18 12:00 |
05:18:31.74 |
-17:34:50.6 |
HIP 24781 |
3.51 |
| 2026-08-19 00:00 |
05:18:32.94 |
-17:35:17.3 |
HIP 24781 |
3.32 |