C/1999 K5 (LINEAR)
| Parameter |
Value |
| Designation |
C/1999 K5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-07-04T09:14:43.310400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
239 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
10.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-03-16.0000000 |
| e |
1.00176295 |
| q (au) |
3.255394 |
| a (au) |
-1846.560639 |
| i (deg) |
89.471269 |
| Ω (om, deg) |
106.379754 |
| ω (w, deg) |
241.485412 |
| M (ma, deg) |
-0.001371 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.963 + 5.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.963 |
| n |
5.981 |
| gf |
1.000 |
| gb |
-0.529 |
| 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) |
| 2026-02-03 00:00 |
07:32:44.14 |
+53:25:00.0 |
HIP 36814 |
17.24 |
| 2026-02-03 12:00 |
07:32:40.10 |
+53:24:59.0 |
HIP 36814 |
17.73 |
| 2026-02-04 00:00 |
07:32:36.07 |
+53:24:57.9 |
HIP 36814 |
18.23 |
| 2026-02-04 12:00 |
07:32:32.07 |
+53:24:56.6 |
HIP 36814 |
18.74 |
| 2026-02-05 00:00 |
07:32:28.07 |
+53:24:55.2 |
HIP 36814 |
19.25 |
| 2026-02-05 12:00 |
07:32:24.10 |
+53:24:53.5 |
HIP 36814 |
19.76 |
| 2026-02-06 00:00 |
07:32:20.14 |
+53:24:51.6 |
HIP 36814 |
20.28 |
| 2026-02-06 12:00 |
07:32:16.20 |
+53:24:49.5 |
HIP 36696 |
20.58 |
| 2026-02-07 00:00 |
07:32:12.28 |
+53:24:47.3 |
HIP 36696 |
20.79 |
| 2026-02-07 12:00 |
07:32:08.37 |
+53:24:44.8 |
HIP 36696 |
21.01 |
| 2026-02-08 00:00 |
07:32:04.48 |
+53:24:42.2 |
HIP 36696 |
21.25 |
| 2026-02-08 12:00 |
07:32:00.62 |
+53:24:39.4 |
HIP 36696 |
21.50 |
| 2026-02-09 00:00 |
07:31:56.77 |
+53:24:36.3 |
HIP 36696 |
21.77 |
| 2026-02-09 12:00 |
07:31:52.94 |
+53:24:33.1 |
HIP 36696 |
22.05 |
| 2026-02-10 00:00 |
07:31:49.13 |
+53:24:29.7 |
HIP 36696 |
22.34 |
| 2026-02-10 12:00 |
07:31:45.34 |
+53:24:26.2 |
HIP 36696 |
22.65 |
| 2026-02-11 00:00 |
07:31:41.57 |
+53:24:22.4 |
HIP 36696 |
22.96 |
| 2026-02-11 12:00 |
07:31:37.82 |
+53:24:18.4 |
HIP 36696 |
23.29 |
| 2026-02-12 00:00 |
07:31:34.09 |
+53:24:14.3 |
HIP 36696 |
23.63 |
| 2026-02-12 12:00 |
07:31:30.39 |
+53:24:09.9 |
HIP 36696 |
23.97 |
| 2026-02-13 00:00 |
07:31:26.70 |
+53:24:05.4 |
HIP 36696 |
24.33 |
| 2026-02-13 12:00 |
07:31:23.04 |
+53:24:00.7 |
HIP 36696 |
24.69 |
| 2026-02-14 00:00 |
07:31:19.40 |
+53:23:55.8 |
HIP 36696 |
25.06 |
| 2026-02-14 12:00 |
07:31:15.78 |
+53:23:50.8 |
HIP 36696 |
25.44 |
| 2026-02-15 00:00 |
07:31:12.19 |
+53:23:45.5 |
HIP 36696 |
25.82 |
| 2026-02-15 12:00 |
07:31:08.62 |
+53:23:40.1 |
HIP 36696 |
26.21 |
| 2026-02-16 00:00 |
07:31:05.07 |
+53:23:34.5 |
HIP 36696 |
26.60 |
| 2026-02-16 12:00 |
07:31:01.54 |
+53:23:28.7 |
HIP 36696 |
27.00 |
| 2026-02-17 00:00 |
07:30:58.04 |
+53:23:22.7 |
HIP 36696 |
27.41 |
| 2026-02-17 12:00 |
07:30:54.57 |
+53:23:16.6 |
HIP 36696 |
27.82 |
| 2026-02-18 00:00 |
07:30:51.12 |
+53:23:10.3 |
HIP 36245 |
28.04 |
| 2026-02-18 12:00 |
07:30:47.69 |
+53:23:03.7 |
HIP 36245 |
27.57 |
| 2026-02-19 00:00 |
07:30:44.29 |
+53:22:57.1 |
HIP 36245 |
27.11 |
| 2026-02-19 12:00 |
07:30:40.91 |
+53:22:50.2 |
HIP 36245 |
26.66 |
| 2026-02-20 00:00 |
07:30:37.56 |
+53:22:43.2 |
HIP 36245 |
26.22 |
| 2026-02-20 12:00 |
07:30:34.24 |
+53:22:36.0 |
HIP 36245 |
25.78 |
| 2026-02-21 00:00 |
07:30:30.94 |
+53:22:28.6 |
HIP 36245 |
25.35 |
| 2026-02-21 12:00 |
07:30:27.67 |
+53:22:21.1 |
HIP 36245 |
24.93 |
| 2026-02-22 00:00 |
07:30:24.43 |
+53:22:13.4 |
HIP 36245 |
24.51 |
| 2026-02-22 12:00 |
07:30:21.21 |
+53:22:05.5 |
HIP 36245 |
24.10 |
| 2026-02-23 00:00 |
07:30:18.02 |
+53:21:57.5 |
HIP 36245 |
23.71 |
| 2026-02-23 12:00 |
07:30:14.86 |
+53:21:49.3 |
HIP 36245 |
23.32 |
| 2026-02-24 00:00 |
07:30:11.73 |
+53:21:40.9 |
HIP 36245 |
22.93 |