| 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) |
| 2026-03-26 00:00 |
05:52:12.22 |
+00:31:22.1 |
HIP 27794 |
24.08 |
| 2026-03-26 12:00 |
05:52:12.59 |
+00:31:35.6 |
HIP 27842 |
24.02 |
| 2026-03-27 00:00 |
05:52:12.97 |
+00:31:49.0 |
HIP 27842 |
23.81 |
| 2026-03-27 12:00 |
05:52:13.37 |
+00:32:02.4 |
HIP 27842 |
23.59 |
| 2026-03-28 00:00 |
05:52:13.79 |
+00:32:15.8 |
HIP 27842 |
23.37 |
| 2026-03-28 12:00 |
05:52:14.24 |
+00:32:29.1 |
HIP 27842 |
23.14 |
| 2026-03-29 00:00 |
05:52:14.71 |
+00:32:42.5 |
HIP 27842 |
22.92 |
| 2026-03-29 12:00 |
05:52:15.19 |
+00:32:55.8 |
HIP 27842 |
22.68 |
| 2026-03-30 00:00 |
05:52:15.70 |
+00:33:09.1 |
HIP 27842 |
22.45 |
| 2026-03-30 12:00 |
05:52:16.23 |
+00:33:22.4 |
HIP 27842 |
22.21 |
| 2026-03-31 00:00 |
05:52:16.78 |
+00:33:35.6 |
HIP 27842 |
21.97 |
| 2026-03-31 12:00 |
05:52:17.35 |
+00:33:48.8 |
HIP 27842 |
21.72 |
| 2026-04-01 00:00 |
05:52:17.94 |
+00:34:02.0 |
HIP 27842 |
21.47 |
| 2026-04-01 12:00 |
05:52:18.55 |
+00:34:15.2 |
HIP 27842 |
21.22 |
| 2026-04-02 00:00 |
05:52:19.18 |
+00:34:28.3 |
HIP 27842 |
20.96 |
| 2026-04-02 12:00 |
05:52:19.83 |
+00:34:41.4 |
HIP 27842 |
20.70 |
| 2026-04-03 00:00 |
05:52:20.50 |
+00:34:54.5 |
HIP 27842 |
20.44 |
| 2026-04-03 12:00 |
05:52:21.20 |
+00:35:07.5 |
HIP 27842 |
20.17 |
| 2026-04-04 00:00 |
05:52:21.91 |
+00:35:20.5 |
HIP 27842 |
19.90 |
| 2026-04-04 12:00 |
05:52:22.64 |
+00:35:33.5 |
HIP 27842 |
19.63 |
| 2026-04-05 00:00 |
05:52:23.40 |
+00:35:46.4 |
HIP 27842 |
19.35 |
| 2026-04-05 12:00 |
05:52:24.17 |
+00:35:59.3 |
HIP 27842 |
19.07 |
| 2026-04-06 00:00 |
05:52:24.96 |
+00:36:12.2 |
HIP 27842 |
18.78 |
| 2026-04-06 12:00 |
05:52:25.78 |
+00:36:25.0 |
HIP 27842 |
18.50 |
| 2026-04-07 00:00 |
05:52:26.61 |
+00:36:37.8 |
HIP 27842 |
18.20 |
| 2026-04-07 12:00 |
05:52:27.46 |
+00:36:50.5 |
HIP 27842 |
17.91 |
| 2026-04-08 00:00 |
05:52:28.34 |
+00:37:03.2 |
HIP 27842 |
17.61 |
| 2026-04-08 12:00 |
05:52:29.23 |
+00:37:15.9 |
HIP 27842 |
17.31 |
| 2026-04-09 00:00 |
05:52:30.14 |
+00:37:28.5 |
HIP 27842 |
17.00 |
| 2026-04-09 12:00 |
05:52:31.07 |
+00:37:41.0 |
HIP 27842 |
16.69 |
| 2026-04-10 00:00 |
05:52:32.02 |
+00:37:53.6 |
HIP 27842 |
16.38 |
| 2026-04-10 12:00 |
05:52:33.00 |
+00:38:06.1 |
HIP 27842 |
16.06 |
| 2026-04-11 00:00 |
05:52:33.99 |
+00:38:18.5 |
HIP 27842 |
15.74 |
| 2026-04-11 12:00 |
05:52:34.99 |
+00:38:30.9 |
HIP 27842 |
15.42 |
| 2026-04-12 00:00 |
05:52:36.02 |
+00:38:43.2 |
HIP 27842 |
15.09 |
| 2026-04-12 12:00 |
05:52:37.07 |
+00:38:55.5 |
HIP 27842 |
14.76 |
| 2026-04-13 00:00 |
05:52:38.14 |
+00:39:07.7 |
HIP 27842 |
14.43 |
| 2026-04-13 12:00 |
05:52:39.22 |
+00:39:19.9 |
HIP 27842 |
14.09 |
| 2026-04-14 00:00 |
05:52:40.33 |
+00:39:32.1 |
HIP 27842 |
13.75 |
| 2026-04-14 12:00 |
05:52:41.45 |
+00:39:44.2 |
HIP 27842 |
13.40 |
| 2026-04-15 00:00 |
05:52:42.59 |
+00:39:56.2 |
HIP 27842 |
13.06 |
| 2026-04-15 12:00 |
05:52:43.76 |
+00:40:08.2 |
HIP 27842 |
12.70 |
| 2026-04-16 00:00 |
05:52:44.94 |
+00:40:20.1 |
HIP 27842 |
12.35 |