C/2002 K2 (LINEAR)
| 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) |
| 2026-02-03 00:00 |
08:35:04.65 |
+29:50:26.8 |
HIP 42182 |
16.27 |
| 2026-02-03 12:00 |
08:35:01.19 |
+29:50:34.5 |
HIP 42182 |
16.76 |
| 2026-02-04 00:00 |
08:34:57.74 |
+29:50:42.1 |
HIP 42182 |
17.27 |
| 2026-02-04 12:00 |
08:34:54.29 |
+29:50:49.6 |
HIP 42182 |
17.80 |
| 2026-02-05 00:00 |
08:34:50.85 |
+29:50:57.0 |
HIP 42182 |
18.35 |
| 2026-02-05 12:00 |
08:34:47.40 |
+29:51:04.3 |
HIP 42182 |
18.91 |
| 2026-02-06 00:00 |
08:34:43.97 |
+29:51:11.5 |
HIP 42182 |
19.48 |
| 2026-02-06 12:00 |
08:34:40.54 |
+29:51:18.6 |
HIP 42182 |
20.07 |
| 2026-02-07 00:00 |
08:34:37.12 |
+29:51:25.6 |
HIP 42182 |
20.66 |
| 2026-02-07 12:00 |
08:34:33.70 |
+29:51:32.6 |
HIP 42182 |
21.27 |
| 2026-02-08 00:00 |
08:34:30.29 |
+29:51:39.4 |
HIP 42182 |
21.88 |
| 2026-02-08 12:00 |
08:34:26.88 |
+29:51:46.1 |
HIP 42182 |
22.50 |
| 2026-02-09 00:00 |
08:34:23.49 |
+29:51:52.8 |
HIP 42182 |
23.13 |
| 2026-02-09 12:00 |
08:34:20.10 |
+29:51:59.3 |
HIP 42182 |
23.77 |
| 2026-02-10 00:00 |
08:34:16.71 |
+29:52:05.7 |
HIP 42182 |
24.40 |
| 2026-02-10 12:00 |
08:34:13.34 |
+29:52:12.0 |
HIP 42182 |
25.05 |
| 2026-02-11 00:00 |
08:34:09.97 |
+29:52:18.3 |
HIP 42182 |
25.70 |
| 2026-02-11 12:00 |
08:34:06.61 |
+29:52:24.4 |
HIP 42182 |
26.35 |
| 2026-02-12 00:00 |
08:34:03.26 |
+29:52:30.4 |
HIP 42182 |
27.00 |
| 2026-02-12 12:00 |
08:33:59.92 |
+29:52:36.3 |
HIP 42182 |
27.66 |
| 2026-02-13 00:00 |
08:33:56.58 |
+29:52:42.1 |
HIP 42182 |
28.32 |
| 2026-02-13 12:00 |
08:33:53.26 |
+29:52:47.8 |
HIP 41841 |
28.24 |
| 2026-02-14 00:00 |
08:33:49.95 |
+29:52:53.4 |
HIP 41841 |
27.61 |
| 2026-02-14 12:00 |
08:33:46.64 |
+29:52:58.9 |
HIP 41841 |
26.98 |
| 2026-02-15 00:00 |
08:33:43.35 |
+29:53:04.3 |
HIP 41841 |
26.35 |
| 2026-02-15 12:00 |
08:33:40.06 |
+29:53:09.6 |
HIP 41841 |
25.74 |
| 2026-02-16 00:00 |
08:33:36.79 |
+29:53:14.8 |
HIP 41841 |
25.13 |
| 2026-02-16 12:00 |
08:33:33.53 |
+29:53:19.9 |
HIP 41841 |
24.52 |
| 2026-02-17 00:00 |
08:33:30.28 |
+29:53:24.8 |
HIP 41841 |
23.92 |
| 2026-02-17 12:00 |
08:33:27.04 |
+29:53:29.7 |
HIP 41841 |
23.34 |
| 2026-02-18 00:00 |
08:33:23.81 |
+29:53:34.4 |
HIP 41841 |
22.76 |
| 2026-02-18 12:00 |
08:33:20.59 |
+29:53:39.0 |
HIP 41841 |
22.18 |
| 2026-02-19 00:00 |
08:33:17.39 |
+29:53:43.5 |
HIP 41841 |
21.62 |
| 2026-02-19 12:00 |
08:33:14.20 |
+29:53:47.9 |
HIP 41841 |
21.07 |
| 2026-02-20 00:00 |
08:33:11.02 |
+29:53:52.2 |
HIP 41841 |
20.52 |
| 2026-02-20 12:00 |
08:33:07.85 |
+29:53:56.4 |
HIP 41841 |
19.99 |
| 2026-02-21 00:00 |
08:33:04.70 |
+29:54:00.5 |
HIP 41841 |
19.47 |
| 2026-02-21 12:00 |
08:33:01.56 |
+29:54:04.4 |
HIP 41841 |
18.96 |
| 2026-02-22 00:00 |
08:32:58.43 |
+29:54:08.3 |
HIP 41841 |
18.46 |
| 2026-02-22 12:00 |
08:32:55.32 |
+29:54:12.0 |
HIP 41841 |
17.98 |
| 2026-02-23 00:00 |
08:32:52.22 |
+29:54:15.6 |
HIP 41841 |
17.50 |
| 2026-02-23 12:00 |
08:32:49.14 |
+29:54:19.1 |
HIP 41841 |
17.05 |
| 2026-02-24 00:00 |
08:32:46.07 |
+29:54:22.5 |
HIP 41841 |
16.61 |