| Parameter |
Value |
| Designation |
C/2002 O6 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-09-09T10:47:45.683520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:18Z |
| Obs used |
215 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
17.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-08-11.0000000 |
| e |
0.99857622 |
| q (au) |
0.494648 |
| a (au) |
347.419672 |
| i (deg) |
58.623930 |
| Ω (om, deg) |
330.951734 |
| ω (w, deg) |
78.749213 |
| M (ma, deg) |
359.995518 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.479 + 5.037\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.479 |
| n |
5.037 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-03-26 00:00 |
11:17:10.67 |
-55:24:33.1 |
HIP 55080 |
10.10 |
| 2026-03-26 12:00 |
11:17:06.53 |
-55:24:16.6 |
HIP 55080 |
10.06 |
| 2026-03-27 00:00 |
11:17:02.40 |
-55:24:00.0 |
HIP 55080 |
10.08 |
| 2026-03-27 12:00 |
11:16:58.29 |
-55:23:43.0 |
HIP 55080 |
10.14 |
| 2026-03-28 00:00 |
11:16:54.19 |
-55:23:25.7 |
HIP 55080 |
10.25 |
| 2026-03-28 12:00 |
11:16:50.10 |
-55:23:08.2 |
HIP 55080 |
10.40 |
| 2026-03-29 00:00 |
11:16:46.03 |
-55:22:50.5 |
HIP 55080 |
10.59 |
| 2026-03-29 12:00 |
11:16:41.97 |
-55:22:32.4 |
HIP 55080 |
10.82 |
| 2026-03-30 00:00 |
11:16:37.93 |
-55:22:14.1 |
HIP 55080 |
11.09 |
| 2026-03-30 12:00 |
11:16:33.90 |
-55:21:55.6 |
HIP 55036 |
10.61 |
| 2026-03-31 00:00 |
11:16:29.88 |
-55:21:36.7 |
HIP 55036 |
10.08 |
| 2026-03-31 12:00 |
11:16:25.88 |
-55:21:17.6 |
HIP 55036 |
9.55 |
| 2026-04-01 00:00 |
11:16:21.89 |
-55:20:58.3 |
HIP 55036 |
9.04 |
| 2026-04-01 12:00 |
11:16:17.92 |
-55:20:38.7 |
HIP 55036 |
8.55 |
| 2026-04-02 00:00 |
11:16:13.97 |
-55:20:18.9 |
HIP 55036 |
8.07 |
| 2026-04-02 12:00 |
11:16:10.03 |
-55:19:58.8 |
HIP 55036 |
7.62 |
| 2026-04-03 00:00 |
11:16:06.11 |
-55:19:38.4 |
HIP 55036 |
7.19 |
| 2026-04-03 12:00 |
11:16:02.20 |
-55:19:17.8 |
HIP 55036 |
6.79 |
| 2026-04-04 00:00 |
11:15:58.31 |
-55:18:56.9 |
HIP 55036 |
6.44 |
| 2026-04-04 12:00 |
11:15:54.44 |
-55:18:35.8 |
HIP 55036 |
6.13 |
| 2026-04-05 00:00 |
11:15:50.59 |
-55:18:14.5 |
HIP 55036 |
5.87 |
| 2026-04-05 12:00 |
11:15:46.76 |
-55:17:52.9 |
HIP 55036 |
5.67 |
| 2026-04-06 00:00 |
11:15:42.94 |
-55:17:31.1 |
HIP 55036 |
5.53 |
| 2026-04-06 12:00 |
11:15:39.14 |
-55:17:09.0 |
HIP 55036 |
5.47 |
| 2026-04-07 00:00 |
11:15:35.36 |
-55:16:46.7 |
HIP 55036 |
5.48 |
| 2026-04-07 12:00 |
11:15:31.60 |
-55:16:24.2 |
HIP 55036 |
5.56 |
| 2026-04-08 00:00 |
11:15:27.86 |
-55:16:01.4 |
HIP 55036 |
5.71 |
| 2026-04-08 12:00 |
11:15:24.14 |
-55:15:38.4 |
HIP 55036 |
5.93 |
| 2026-04-09 00:00 |
11:15:20.44 |
-55:15:15.2 |
HIP 55036 |
6.20 |
| 2026-04-09 12:00 |
11:15:16.76 |
-55:14:51.8 |
HIP 55036 |
6.53 |
| 2026-04-10 00:00 |
11:15:13.10 |
-55:14:28.1 |
HIP 55036 |
6.89 |
| 2026-04-10 12:00 |
11:15:09.46 |
-55:14:04.2 |
HIP 55036 |
7.30 |
| 2026-04-11 00:00 |
11:15:05.84 |
-55:13:40.0 |
HIP 55036 |
7.73 |
| 2026-04-11 12:00 |
11:15:02.24 |
-55:13:15.7 |
HIP 55036 |
8.19 |
| 2026-04-12 00:00 |
11:14:58.67 |
-55:12:51.1 |
HIP 55036 |
8.68 |
| 2026-04-12 12:00 |
11:14:55.11 |
-55:12:26.4 |
HIP 55036 |
9.18 |
| 2026-04-13 00:00 |
11:14:51.58 |
-55:12:01.4 |
HIP 55036 |
9.70 |
| 2026-04-13 12:00 |
11:14:48.08 |
-55:11:36.2 |
HIP 55036 |
10.23 |
| 2026-04-14 00:00 |
11:14:44.59 |
-55:11:10.8 |
HIP 55036 |
10.77 |
| 2026-04-14 12:00 |
11:14:41.13 |
-55:10:45.2 |
HIP 55036 |
11.32 |
| 2026-04-15 00:00 |
11:14:37.69 |
-55:10:19.3 |
HIP 55036 |
11.87 |
| 2026-04-15 12:00 |
11:14:34.27 |
-55:09:53.3 |
HIP 55036 |
12.44 |
| 2026-04-16 00:00 |
11:14:30.88 |
-55:09:27.1 |
HIP 55036 |
13.01 |