| Parameter |
Value |
| Designation |
C/1999 K6 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-07-24T16:11:00.306240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
320 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1999-08-05.0000000 |
| e |
0.99352053 |
| q (au) |
2.246977 |
| a (au) |
346.784195 |
| i (deg) |
46.343845 |
| Ω (om, deg) |
245.372062 |
| ω (w, deg) |
56.763680 |
| M (ma, deg) |
0.001729 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.035 + 5.053\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.035 |
| n |
5.053 |
| 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 |
06:02:17.46 |
+00:24:04.7 |
HIP 28608 |
29.03 |
| 2026-09-20 12:00 |
06:02:17.65 |
+00:23:49.2 |
HIP 28608 |
28.78 |
| 2026-09-21 00:00 |
06:02:17.82 |
+00:23:33.7 |
HIP 28608 |
28.52 |
| 2026-09-21 12:00 |
06:02:17.96 |
+00:23:18.2 |
HIP 28608 |
28.26 |
| 2026-09-22 00:00 |
06:02:18.08 |
+00:23:02.7 |
HIP 28608 |
28.00 |
| 2026-09-22 12:00 |
06:02:18.19 |
+00:22:47.2 |
HIP 28608 |
27.74 |
| 2026-09-23 00:00 |
06:02:18.27 |
+00:22:31.7 |
HIP 28608 |
27.49 |
| 2026-09-23 12:00 |
06:02:18.33 |
+00:22:16.2 |
HIP 28608 |
27.23 |
| 2026-09-24 00:00 |
06:02:18.37 |
+00:22:00.7 |
HIP 28608 |
26.97 |
| 2026-09-24 12:00 |
06:02:18.39 |
+00:21:45.1 |
HIP 28608 |
26.71 |
| 2026-09-25 00:00 |
06:02:18.39 |
+00:21:29.6 |
HIP 28608 |
26.45 |
| 2026-09-25 12:00 |
06:02:18.36 |
+00:21:14.1 |
HIP 28608 |
26.19 |
| 2026-09-26 00:00 |
06:02:18.32 |
+00:20:58.6 |
HIP 28608 |
25.93 |
| 2026-09-26 12:00 |
06:02:18.25 |
+00:20:43.0 |
HIP 28608 |
25.68 |
| 2026-09-27 00:00 |
06:02:18.17 |
+00:20:27.5 |
HIP 28608 |
25.42 |
| 2026-09-27 12:00 |
06:02:18.06 |
+00:20:12.0 |
HIP 28608 |
25.16 |
| 2026-09-28 00:00 |
06:02:17.93 |
+00:19:56.5 |
HIP 28608 |
24.90 |
| 2026-09-28 12:00 |
06:02:17.78 |
+00:19:41.0 |
HIP 28608 |
24.64 |
| 2026-09-29 00:00 |
06:02:17.61 |
+00:19:25.5 |
HIP 28608 |
24.38 |
| 2026-09-29 12:00 |
06:02:17.42 |
+00:19:10.0 |
HIP 28608 |
24.12 |
| 2026-09-30 00:00 |
06:02:17.21 |
+00:18:54.5 |
HIP 28608 |
23.86 |
| 2026-09-30 12:00 |
06:02:16.98 |
+00:18:39.0 |
HIP 28608 |
23.61 |
| 2026-10-01 00:00 |
06:02:16.72 |
+00:18:23.6 |
HIP 28608 |
23.35 |
| 2026-10-01 12:00 |
06:02:16.45 |
+00:18:08.1 |
HIP 28608 |
23.09 |
| 2026-10-02 00:00 |
06:02:16.15 |
+00:17:52.7 |
HIP 28608 |
22.83 |
| 2026-10-02 12:00 |
06:02:15.83 |
+00:17:37.3 |
HIP 28608 |
22.58 |
| 2026-10-03 00:00 |
06:02:15.50 |
+00:17:21.8 |
HIP 28608 |
22.32 |
| 2026-10-03 12:00 |
06:02:15.14 |
+00:17:06.4 |
HIP 28608 |
22.07 |
| 2026-10-04 00:00 |
06:02:14.76 |
+00:16:51.1 |
HIP 28608 |
21.81 |
| 2026-10-04 12:00 |
06:02:14.35 |
+00:16:35.7 |
HIP 28608 |
21.56 |
| 2026-10-05 00:00 |
06:02:13.93 |
+00:16:20.4 |
HIP 28608 |
21.31 |
| 2026-10-05 12:00 |
06:02:13.49 |
+00:16:05.0 |
HIP 28608 |
21.05 |
| 2026-10-06 00:00 |
06:02:13.02 |
+00:15:49.7 |
HIP 28608 |
20.80 |
| 2026-10-06 12:00 |
06:02:12.54 |
+00:15:34.5 |
HIP 28608 |
20.56 |
| 2026-10-07 00:00 |
06:02:12.03 |
+00:15:19.2 |
HIP 28608 |
20.31 |
| 2026-10-07 12:00 |
06:02:11.50 |
+00:15:04.0 |
HIP 28608 |
20.06 |
| 2026-10-08 00:00 |
06:02:10.95 |
+00:14:48.8 |
HIP 28608 |
19.82 |
| 2026-10-08 12:00 |
06:02:10.38 |
+00:14:33.6 |
HIP 28608 |
19.58 |
| 2026-10-09 00:00 |
06:02:09.79 |
+00:14:18.5 |
HIP 28608 |
19.34 |
| 2026-10-09 12:00 |
06:02:09.18 |
+00:14:03.3 |
HIP 28608 |
19.10 |
| 2026-10-10 00:00 |
06:02:08.55 |
+00:13:48.2 |
HIP 28608 |
18.87 |
| 2026-10-10 12:00 |
06:02:07.89 |
+00:13:33.2 |
HIP 28608 |
18.64 |
| 2026-10-11 00:00 |
06:02:07.22 |
+00:13:18.2 |
HIP 28608 |
18.41 |