| 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) |
| 2026-09-20 00:00 |
07:43:22.47 |
+52:34:23.7 |
HIP 37694 |
7.29 |
| 2026-09-20 12:00 |
07:43:24.30 |
+52:34:40.9 |
HIP 37694 |
6.89 |
| 2026-09-21 00:00 |
07:43:26.10 |
+52:34:58.3 |
HIP 37694 |
6.50 |
| 2026-09-21 12:00 |
07:43:27.87 |
+52:35:15.7 |
HIP 37694 |
6.11 |
| 2026-09-22 00:00 |
07:43:29.60 |
+52:35:33.3 |
HIP 37694 |
5.72 |
| 2026-09-22 12:00 |
07:43:31.31 |
+52:35:51.0 |
HIP 37694 |
5.33 |
| 2026-09-23 00:00 |
07:43:32.99 |
+52:36:08.8 |
HIP 37694 |
4.95 |
| 2026-09-23 12:00 |
07:43:34.63 |
+52:36:26.7 |
HIP 37694 |
4.58 |
| 2026-09-24 00:00 |
07:43:36.25 |
+52:36:44.8 |
HIP 37694 |
4.21 |
| 2026-09-24 12:00 |
07:43:37.83 |
+52:37:02.9 |
HIP 37694 |
3.84 |
| 2026-09-25 00:00 |
07:43:39.38 |
+52:37:21.2 |
HIP 37694 |
3.49 |
| 2026-09-25 12:00 |
07:43:40.90 |
+52:37:39.6 |
HIP 37694 |
3.15 |
| 2026-09-26 00:00 |
07:43:42.39 |
+52:37:58.1 |
HIP 37694 |
2.81 |
| 2026-09-26 12:00 |
07:43:43.84 |
+52:38:16.7 |
HIP 37694 |
2.50 |
| 2026-09-27 00:00 |
07:43:45.27 |
+52:38:35.4 |
HIP 37694 |
2.22 |
| 2026-09-27 12:00 |
07:43:46.66 |
+52:38:54.2 |
HIP 37694 |
1.97 |
| 2026-09-28 00:00 |
07:43:48.02 |
+52:39:13.1 |
HIP 37694 |
1.77 |
| 2026-09-28 12:00 |
07:43:49.35 |
+52:39:32.1 |
HIP 37694 |
1.64 |
| 2026-09-29 00:00 |
07:43:50.64 |
+52:39:51.3 |
HIP 37694 |
1.60 |
| 2026-09-29 12:00 |
07:43:51.91 |
+52:40:10.5 |
HIP 37694 |
1.65 |
| 2026-09-30 00:00 |
07:43:53.14 |
+52:40:29.8 |
HIP 37694 |
1.78 |
| 2026-09-30 12:00 |
07:43:54.33 |
+52:40:49.3 |
HIP 37694 |
1.98 |
| 2026-10-01 00:00 |
07:43:55.50 |
+52:41:08.8 |
HIP 37694 |
2.23 |
| 2026-10-01 12:00 |
07:43:56.63 |
+52:41:28.4 |
HIP 37694 |
2.51 |
| 2026-10-02 00:00 |
07:43:57.72 |
+52:41:48.2 |
HIP 37694 |
2.81 |
| 2026-10-02 12:00 |
07:43:58.79 |
+52:42:08.0 |
HIP 37694 |
3.13 |
| 2026-10-03 00:00 |
07:43:59.82 |
+52:42:27.9 |
HIP 37694 |
3.46 |
| 2026-10-03 12:00 |
07:44:00.82 |
+52:42:48.0 |
HIP 37694 |
3.79 |
| 2026-10-04 00:00 |
07:44:01.78 |
+52:43:08.1 |
HIP 37694 |
4.14 |
| 2026-10-04 12:00 |
07:44:02.71 |
+52:43:28.3 |
HIP 37694 |
4.49 |
| 2026-10-05 00:00 |
07:44:03.60 |
+52:43:48.6 |
HIP 37694 |
4.84 |
| 2026-10-05 12:00 |
07:44:04.47 |
+52:44:09.0 |
HIP 37694 |
5.19 |
| 2026-10-06 00:00 |
07:44:05.29 |
+52:44:29.5 |
HIP 37694 |
5.55 |
| 2026-10-06 12:00 |
07:44:06.09 |
+52:44:50.0 |
HIP 37694 |
5.91 |
| 2026-10-07 00:00 |
07:44:06.84 |
+52:45:10.7 |
HIP 37694 |
6.26 |
| 2026-10-07 12:00 |
07:44:07.57 |
+52:45:31.4 |
HIP 37694 |
6.62 |
| 2026-10-08 00:00 |
07:44:08.26 |
+52:45:52.2 |
HIP 37694 |
6.98 |
| 2026-10-08 12:00 |
07:44:08.91 |
+52:46:13.1 |
HIP 37694 |
7.35 |
| 2026-10-09 00:00 |
07:44:09.53 |
+52:46:34.1 |
HIP 37694 |
7.71 |
| 2026-10-09 12:00 |
07:44:10.11 |
+52:46:55.2 |
HIP 37694 |
8.07 |
| 2026-10-10 00:00 |
07:44:10.66 |
+52:47:16.4 |
HIP 37694 |
8.43 |
| 2026-10-10 12:00 |
07:44:11.17 |
+52:47:37.6 |
HIP 37694 |
8.79 |
| 2026-10-11 00:00 |
07:44:11.65 |
+52:47:58.9 |
HIP 37694 |
9.15 |