| Parameter |
Value |
| Designation |
C/2002 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-01-05T20:02:48.010560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:16Z |
| Obs used |
136 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
11.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-06-25.0000000 |
| e |
0.99313694 |
| q (au) |
5.235061 |
| a (au) |
762.787805 |
| i (deg) |
130.895647 |
| Ω (om, deg) |
294.556678 |
| ω (w, deg) |
26.665091 |
| M (ma, deg) |
0.007961 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.268 + 3.515\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.268 |
| n |
3.515 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
08:30:15.80 |
+29:54:14.2 |
HIP 41624 |
23.32 |
| 2026-03-26 12:00 |
08:30:13.96 |
+29:54:10.5 |
HIP 41624 |
23.13 |
| 2026-03-27 00:00 |
08:30:12.16 |
+29:54:06.8 |
HIP 41624 |
22.95 |
| 2026-03-27 12:00 |
08:30:10.37 |
+29:54:02.9 |
HIP 41624 |
22.78 |
| 2026-03-28 00:00 |
08:30:08.61 |
+29:53:58.9 |
HIP 41624 |
22.61 |
| 2026-03-28 12:00 |
08:30:06.88 |
+29:53:54.8 |
HIP 41624 |
22.46 |
| 2026-03-29 00:00 |
08:30:05.17 |
+29:53:50.6 |
HIP 41624 |
22.32 |
| 2026-03-29 12:00 |
08:30:03.49 |
+29:53:46.3 |
HIP 41624 |
22.18 |
| 2026-03-30 00:00 |
08:30:01.83 |
+29:53:41.9 |
HIP 41624 |
22.06 |
| 2026-03-30 12:00 |
08:30:00.20 |
+29:53:37.4 |
HIP 41624 |
21.95 |
| 2026-03-31 00:00 |
08:29:58.59 |
+29:53:32.8 |
HIP 41624 |
21.84 |
| 2026-03-31 12:00 |
08:29:57.01 |
+29:53:28.0 |
HIP 41624 |
21.75 |
| 2026-04-01 00:00 |
08:29:55.45 |
+29:53:23.2 |
HIP 41624 |
21.66 |
| 2026-04-01 12:00 |
08:29:53.92 |
+29:53:18.2 |
HIP 41624 |
21.59 |
| 2026-04-02 00:00 |
08:29:52.42 |
+29:53:13.2 |
HIP 41624 |
21.52 |
| 2026-04-02 12:00 |
08:29:50.94 |
+29:53:08.0 |
HIP 41624 |
21.46 |
| 2026-04-03 00:00 |
08:29:49.48 |
+29:53:02.7 |
HIP 41624 |
21.41 |
| 2026-04-03 12:00 |
08:29:48.06 |
+29:52:57.4 |
HIP 41624 |
21.37 |
| 2026-04-04 00:00 |
08:29:46.65 |
+29:52:51.9 |
HIP 41624 |
21.34 |
| 2026-04-04 12:00 |
08:29:45.28 |
+29:52:46.3 |
HIP 41624 |
21.32 |
| 2026-04-05 00:00 |
08:29:43.93 |
+29:52:40.6 |
HIP 41624 |
21.30 |
| 2026-04-05 12:00 |
08:29:42.60 |
+29:52:34.9 |
HIP 41624 |
21.29 |
| 2026-04-06 00:00 |
08:29:41.31 |
+29:52:29.0 |
HIP 41624 |
21.29 |
| 2026-04-06 12:00 |
08:29:40.04 |
+29:52:23.0 |
HIP 41624 |
21.30 |
| 2026-04-07 00:00 |
08:29:38.79 |
+29:52:16.9 |
HIP 41624 |
21.32 |
| 2026-04-07 12:00 |
08:29:37.57 |
+29:52:10.7 |
HIP 41624 |
21.34 |
| 2026-04-08 00:00 |
08:29:36.38 |
+29:52:04.4 |
HIP 41624 |
21.37 |
| 2026-04-08 12:00 |
08:29:35.21 |
+29:51:58.0 |
HIP 41624 |
21.40 |
| 2026-04-09 00:00 |
08:29:34.07 |
+29:51:51.5 |
HIP 41624 |
21.44 |
| 2026-04-09 12:00 |
08:29:32.96 |
+29:51:44.9 |
HIP 41624 |
21.49 |
| 2026-04-10 00:00 |
08:29:31.87 |
+29:51:38.2 |
HIP 41624 |
21.55 |
| 2026-04-10 12:00 |
08:29:30.82 |
+29:51:31.4 |
HIP 41624 |
21.61 |
| 2026-04-11 00:00 |
08:29:29.78 |
+29:51:24.6 |
HIP 41624 |
21.67 |
| 2026-04-11 12:00 |
08:29:28.78 |
+29:51:17.6 |
HIP 41624 |
21.74 |
| 2026-04-12 00:00 |
08:29:27.80 |
+29:51:10.5 |
HIP 41624 |
21.82 |
| 2026-04-12 12:00 |
08:29:26.84 |
+29:51:03.3 |
HIP 41624 |
21.90 |
| 2026-04-13 00:00 |
08:29:25.92 |
+29:50:56.0 |
HIP 41624 |
21.99 |
| 2026-04-13 12:00 |
08:29:25.02 |
+29:50:48.7 |
HIP 41624 |
22.08 |
| 2026-04-14 00:00 |
08:29:24.15 |
+29:50:41.2 |
HIP 41624 |
22.18 |
| 2026-04-14 12:00 |
08:29:23.30 |
+29:50:33.6 |
HIP 41624 |
22.28 |
| 2026-04-15 00:00 |
08:29:22.49 |
+29:50:26.0 |
HIP 41632 |
22.31 |
| 2026-04-15 12:00 |
08:29:21.69 |
+29:50:18.2 |
HIP 41632 |
22.17 |
| 2026-04-16 00:00 |
08:29:20.93 |
+29:50:10.4 |
HIP 41632 |
22.04 |