| Parameter |
Value |
| Designation |
C/2003 L2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-01-19T04:34:34.224960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:31Z |
| Obs used |
492 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2003-09-17.0000000 |
| e |
0.98145123 |
| q (au) |
2.864798 |
| a (au) |
154.446795 |
| i (deg) |
82.051084 |
| Ω (om, deg) |
273.559217 |
| ω (w, deg) |
119.840959 |
| M (ma, deg) |
359.936229 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.617 + 3.294\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.617 |
| n |
3.294 |
| gf |
1.000 |
| gb |
-0.817 |
| 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) |
| 2026-06-01 00:00 |
07:12:49.30 |
-65:39:58.0 |
HIP 35232 |
30.36 |
| 2026-06-01 12:00 |
07:12:54.96 |
-65:39:34.9 |
HIP 35232 |
29.66 |
| 2026-06-02 00:00 |
07:13:00.65 |
-65:39:12.1 |
HIP 35232 |
28.96 |
| 2026-06-02 12:00 |
07:13:06.37 |
-65:38:49.6 |
HIP 35232 |
28.27 |
| 2026-06-03 00:00 |
07:13:12.12 |
-65:38:27.3 |
HIP 35232 |
27.57 |
| 2026-06-03 12:00 |
07:13:17.89 |
-65:38:05.4 |
HIP 35232 |
26.87 |
| 2026-06-04 00:00 |
07:13:23.70 |
-65:37:43.8 |
HIP 35232 |
26.17 |
| 2026-06-04 12:00 |
07:13:29.54 |
-65:37:22.4 |
HIP 35232 |
25.47 |
| 2026-06-05 00:00 |
07:13:35.41 |
-65:37:01.3 |
HIP 35232 |
24.77 |
| 2026-06-05 12:00 |
07:13:41.31 |
-65:36:40.6 |
HIP 35232 |
24.07 |
| 2026-06-06 00:00 |
07:13:47.23 |
-65:36:20.1 |
HIP 35232 |
23.37 |
| 2026-06-06 12:00 |
07:13:53.18 |
-65:36:00.0 |
HIP 35232 |
22.68 |
| 2026-06-07 00:00 |
07:13:59.16 |
-65:35:40.0 |
HIP 35232 |
21.98 |
| 2026-06-07 12:00 |
07:14:05.17 |
-65:35:20.5 |
HIP 35232 |
21.28 |
| 2026-06-08 00:00 |
07:14:11.20 |
-65:35:01.2 |
HIP 35232 |
20.59 |
| 2026-06-08 12:00 |
07:14:17.26 |
-65:34:42.2 |
HIP 35232 |
19.89 |
| 2026-06-09 00:00 |
07:14:23.35 |
-65:34:23.5 |
HIP 35232 |
19.20 |
| 2026-06-09 12:00 |
07:14:29.46 |
-65:34:05.2 |
HIP 35232 |
18.51 |
| 2026-06-10 00:00 |
07:14:35.59 |
-65:33:47.1 |
HIP 35232 |
17.82 |
| 2026-06-10 12:00 |
07:14:41.76 |
-65:33:29.4 |
HIP 35232 |
17.13 |
| 2026-06-11 00:00 |
07:14:47.94 |
-65:33:11.9 |
HIP 35232 |
16.44 |
| 2026-06-11 12:00 |
07:14:54.15 |
-65:32:54.8 |
HIP 35232 |
15.76 |
| 2026-06-12 00:00 |
07:15:00.39 |
-65:32:38.0 |
HIP 35232 |
15.08 |
| 2026-06-12 12:00 |
07:15:06.64 |
-65:32:21.5 |
HIP 35232 |
14.40 |
| 2026-06-13 00:00 |
07:15:12.92 |
-65:32:05.3 |
HIP 35232 |
13.73 |
| 2026-06-13 12:00 |
07:15:19.23 |
-65:31:49.4 |
HIP 35232 |
13.06 |
| 2026-06-14 00:00 |
07:15:25.55 |
-65:31:33.8 |
HIP 35232 |
12.40 |
| 2026-06-14 12:00 |
07:15:31.90 |
-65:31:18.6 |
HIP 35232 |
11.75 |
| 2026-06-15 00:00 |
07:15:38.27 |
-65:31:03.7 |
HIP 35232 |
11.10 |
| 2026-06-15 12:00 |
07:15:44.65 |
-65:30:49.1 |
HIP 35232 |
10.47 |
| 2026-06-16 00:00 |
07:15:51.06 |
-65:30:34.8 |
HIP 35232 |
9.84 |
| 2026-06-16 12:00 |
07:15:57.49 |
-65:30:20.9 |
HIP 35232 |
9.23 |
| 2026-06-17 00:00 |
07:16:03.94 |
-65:30:07.2 |
HIP 35232 |
8.64 |
| 2026-06-17 12:00 |
07:16:10.41 |
-65:29:53.9 |
HIP 35232 |
8.08 |
| 2026-06-18 00:00 |
07:16:16.89 |
-65:29:41.0 |
HIP 35232 |
7.53 |
| 2026-06-18 12:00 |
07:16:23.40 |
-65:29:28.3 |
HIP 35232 |
7.03 |
| 2026-06-19 00:00 |
07:16:29.92 |
-65:29:16.0 |
HIP 35232 |
6.56 |
| 2026-06-19 12:00 |
07:16:36.46 |
-65:29:04.0 |
HIP 35232 |
6.14 |
| 2026-06-20 00:00 |
07:16:43.01 |
-65:28:52.3 |
HIP 35232 |
5.79 |
| 2026-06-20 12:00 |
07:16:49.59 |
-65:28:41.0 |
HIP 35232 |
5.51 |
| 2026-06-21 00:00 |
07:16:56.17 |
-65:28:30.0 |
HIP 35232 |
5.32 |
| 2026-06-21 12:00 |
07:17:02.78 |
-65:28:19.3 |
HIP 35232 |
5.22 |
| 2026-06-22 00:00 |
07:17:09.40 |
-65:28:09.0 |
HIP 35232 |
5.23 |