| Parameter |
Value |
| Designation |
C/2002 Q2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-17T18:46:31.782720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:19Z |
| Obs used |
166 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-09-04.0000000 |
| e |
0.97789208 |
| q (au) |
1.303022 |
| a (au) |
58.939134 |
| i (deg) |
96.765213 |
| Ω (om, deg) |
154.285005 |
| ω (w, deg) |
125.472100 |
| M (ma, deg) |
0.037504 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.983 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.983 |
| n |
2.000 |
| 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) |
| 2026-09-20 00:00 |
08:46:14.54 |
-56:44:43.6 |
HIP 43105 |
4.11 |
| 2026-09-20 12:00 |
08:46:17.87 |
-56:45:14.6 |
HIP 43105 |
3.51 |
| 2026-09-21 00:00 |
08:46:21.16 |
-56:45:45.8 |
HIP 43105 |
2.96 |
| 2026-09-21 12:00 |
08:46:24.42 |
-56:46:17.3 |
HIP 43105 |
2.49 |
| 2026-09-22 00:00 |
08:46:27.65 |
-56:46:48.9 |
HIP 43105 |
2.14 |
| 2026-09-22 12:00 |
08:46:30.85 |
-56:47:20.7 |
HIP 43105 |
1.98 |
| 2026-09-23 00:00 |
08:46:34.02 |
-56:47:52.8 |
HIP 43105 |
2.06 |
| 2026-09-23 12:00 |
08:46:37.16 |
-56:48:25.0 |
HIP 43105 |
2.35 |
| 2026-09-24 00:00 |
08:46:40.27 |
-56:48:57.4 |
HIP 43105 |
2.79 |
| 2026-09-24 12:00 |
08:46:43.34 |
-56:49:30.0 |
HIP 43105 |
3.31 |
| 2026-09-25 00:00 |
08:46:46.38 |
-56:50:02.8 |
HIP 43105 |
3.89 |
| 2026-09-25 12:00 |
08:46:49.39 |
-56:50:35.8 |
HIP 43105 |
4.51 |
| 2026-09-26 00:00 |
08:46:52.37 |
-56:51:08.9 |
HIP 43105 |
5.14 |
| 2026-09-26 12:00 |
08:46:55.32 |
-56:51:42.3 |
HIP 43105 |
5.79 |
| 2026-09-27 00:00 |
08:46:58.23 |
-56:52:15.8 |
HIP 43105 |
6.44 |
| 2026-09-27 12:00 |
08:47:01.11 |
-56:52:49.5 |
HIP 43105 |
7.11 |
| 2026-09-28 00:00 |
08:47:03.96 |
-56:53:23.4 |
HIP 43105 |
7.77 |
| 2026-09-28 12:00 |
08:47:06.78 |
-56:53:57.4 |
HIP 43105 |
8.45 |
| 2026-09-29 00:00 |
08:47:09.56 |
-56:54:31.6 |
HIP 43105 |
9.12 |
| 2026-09-29 12:00 |
08:47:12.30 |
-56:55:06.0 |
HIP 43105 |
9.80 |
| 2026-09-30 00:00 |
08:47:15.02 |
-56:55:40.6 |
HIP 43105 |
10.47 |
| 2026-09-30 12:00 |
08:47:17.69 |
-56:56:15.3 |
HIP 43105 |
11.15 |
| 2026-10-01 00:00 |
08:47:20.34 |
-56:56:50.2 |
HIP 43105 |
11.83 |
| 2026-10-01 12:00 |
08:47:22.95 |
-56:57:25.2 |
HIP 43105 |
12.52 |
| 2026-10-02 00:00 |
08:47:25.52 |
-56:58:00.4 |
HIP 43105 |
13.20 |
| 2026-10-02 12:00 |
08:47:28.06 |
-56:58:35.8 |
HIP 43105 |
13.88 |
| 2026-10-03 00:00 |
08:47:30.57 |
-56:59:11.3 |
HIP 43105 |
14.56 |
| 2026-10-03 12:00 |
08:47:33.03 |
-56:59:46.9 |
HIP 43105 |
15.24 |
| 2026-10-04 00:00 |
08:47:35.47 |
-57:00:22.7 |
HIP 43105 |
15.92 |
| 2026-10-04 12:00 |
08:47:37.86 |
-57:00:58.7 |
HIP 43105 |
16.61 |
| 2026-10-05 00:00 |
08:47:40.22 |
-57:01:34.8 |
HIP 43286 |
16.82 |
| 2026-10-05 12:00 |
08:47:42.55 |
-57:02:11.0 |
HIP 43286 |
16.16 |
| 2026-10-06 00:00 |
08:47:44.83 |
-57:02:47.4 |
HIP 43286 |
15.51 |
| 2026-10-06 12:00 |
08:47:47.08 |
-57:03:23.9 |
HIP 43286 |
14.86 |
| 2026-10-07 00:00 |
08:47:49.30 |
-57:04:00.5 |
HIP 43286 |
14.21 |
| 2026-10-07 12:00 |
08:47:51.47 |
-57:04:37.3 |
HIP 43286 |
13.57 |
| 2026-10-08 00:00 |
08:47:53.61 |
-57:05:14.2 |
HIP 43286 |
12.94 |
| 2026-10-08 12:00 |
08:47:55.71 |
-57:05:51.2 |
HIP 43286 |
12.31 |
| 2026-10-09 00:00 |
08:47:57.77 |
-57:06:28.4 |
HIP 43286 |
11.69 |
| 2026-10-09 12:00 |
08:47:59.79 |
-57:07:05.6 |
HIP 43286 |
11.08 |
| 2026-10-10 00:00 |
08:48:01.78 |
-57:07:43.0 |
HIP 43286 |
10.49 |
| 2026-10-10 12:00 |
08:48:03.73 |
-57:08:20.5 |
HIP 43286 |
9.91 |
| 2026-10-11 00:00 |
08:48:05.63 |
-57:08:58.1 |
HIP 43286 |
9.34 |