C/2003 S3 (LINEAR)
| Parameter |
Value |
| Designation |
C/2003 S3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2003-04-10T12:54:00.440640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:31Z |
| Obs used |
122 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
9.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2003-10-21.0000000 |
| e |
1.00180553 |
| q (au) |
8.129525 |
| a (au) |
-4502.566031 |
| i (deg) |
151.497754 |
| Ω (om, deg) |
226.388802 |
| ω (w, deg) |
154.570171 |
| M (ma, deg) |
0.000631 |
Magnitude
Scatter + Global Linear
$$
M_a = (0.591 + 5.968\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
0.591 |
| n |
5.968 |
| 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) |
| 2026-02-03 00:00 |
21:07:36.72 |
-45:13:49.2 |
HIP 104296 |
9.05 |
| 2026-02-03 12:00 |
21:07:40.41 |
-45:13:38.5 |
HIP 104296 |
9.15 |
| 2026-02-04 00:00 |
21:07:44.09 |
-45:13:28.0 |
HIP 104296 |
9.30 |
| 2026-02-04 12:00 |
21:07:47.77 |
-45:13:17.7 |
HIP 104296 |
9.49 |
| 2026-02-05 00:00 |
21:07:51.45 |
-45:13:07.6 |
HIP 104296 |
9.72 |
| 2026-02-05 12:00 |
21:07:55.13 |
-45:12:57.7 |
HIP 104296 |
9.98 |
| 2026-02-06 00:00 |
21:07:58.81 |
-45:12:47.9 |
HIP 104296 |
10.28 |
| 2026-02-06 12:00 |
21:08:02.49 |
-45:12:38.4 |
HIP 104296 |
10.61 |
| 2026-02-07 00:00 |
21:08:06.16 |
-45:12:29.0 |
HIP 104296 |
10.97 |
| 2026-02-07 12:00 |
21:08:09.84 |
-45:12:19.8 |
HIP 104296 |
11.35 |
| 2026-02-08 00:00 |
21:08:13.51 |
-45:12:10.8 |
HIP 104296 |
11.75 |
| 2026-02-08 12:00 |
21:08:17.17 |
-45:12:02.0 |
HIP 104296 |
12.18 |
| 2026-02-09 00:00 |
21:08:20.84 |
-45:11:53.4 |
HIP 104296 |
12.62 |
| 2026-02-09 12:00 |
21:08:24.50 |
-45:11:45.0 |
HIP 104403 |
12.85 |
| 2026-02-10 00:00 |
21:08:28.16 |
-45:11:36.7 |
HIP 104403 |
12.42 |
| 2026-02-10 12:00 |
21:08:31.81 |
-45:11:28.7 |
HIP 104403 |
12.00 |
| 2026-02-11 00:00 |
21:08:35.46 |
-45:11:20.8 |
HIP 104403 |
11.61 |
| 2026-02-11 12:00 |
21:08:39.10 |
-45:11:13.2 |
HIP 104403 |
11.25 |
| 2026-02-12 00:00 |
21:08:42.74 |
-45:11:05.7 |
HIP 104403 |
10.92 |
| 2026-02-12 12:00 |
21:08:46.38 |
-45:10:58.4 |
HIP 104403 |
10.62 |
| 2026-02-13 00:00 |
21:08:50.01 |
-45:10:51.4 |
HIP 104403 |
10.36 |
| 2026-02-13 12:00 |
21:08:53.63 |
-45:10:44.5 |
HIP 104403 |
10.13 |
| 2026-02-14 00:00 |
21:08:57.25 |
-45:10:37.8 |
HIP 104403 |
9.95 |
| 2026-02-14 12:00 |
21:09:00.86 |
-45:10:31.3 |
HIP 104403 |
9.81 |
| 2026-02-15 00:00 |
21:09:04.46 |
-45:10:25.1 |
HIP 104403 |
9.72 |
| 2026-02-15 12:00 |
21:09:08.06 |
-45:10:19.0 |
HIP 104403 |
9.67 |
| 2026-02-16 00:00 |
21:09:11.65 |
-45:10:13.1 |
HIP 104403 |
9.66 |
| 2026-02-16 12:00 |
21:09:15.24 |
-45:10:07.4 |
HIP 104403 |
9.71 |
| 2026-02-17 00:00 |
21:09:18.81 |
-45:10:01.9 |
HIP 104403 |
9.79 |
| 2026-02-17 12:00 |
21:09:22.38 |
-45:09:56.7 |
HIP 104403 |
9.92 |
| 2026-02-18 00:00 |
21:09:25.94 |
-45:09:51.6 |
HIP 104403 |
10.09 |
| 2026-02-18 12:00 |
21:09:29.49 |
-45:09:46.7 |
HIP 104403 |
10.30 |
| 2026-02-19 00:00 |
21:09:33.03 |
-45:09:42.1 |
HIP 104403 |
10.54 |
| 2026-02-19 12:00 |
21:09:36.56 |
-45:09:37.6 |
HIP 104403 |
10.82 |
| 2026-02-20 00:00 |
21:09:40.08 |
-45:09:33.3 |
HIP 104403 |
11.13 |
| 2026-02-20 12:00 |
21:09:43.59 |
-45:09:29.3 |
HIP 104403 |
11.46 |
| 2026-02-21 00:00 |
21:09:47.09 |
-45:09:25.4 |
HIP 104403 |
11.82 |
| 2026-02-21 12:00 |
21:09:50.59 |
-45:09:21.8 |
HIP 104403 |
12.20 |
| 2026-02-22 00:00 |
21:09:54.07 |
-45:09:18.3 |
HIP 104403 |
12.61 |
| 2026-02-22 12:00 |
21:09:57.54 |
-45:09:15.1 |
HIP 104403 |
13.02 |
| 2026-02-23 00:00 |
21:10:01.00 |
-45:09:12.1 |
HIP 104403 |
13.46 |
| 2026-02-23 12:00 |
21:10:04.44 |
-45:09:09.3 |
HIP 104403 |
13.91 |
| 2026-02-24 00:00 |
21:10:07.88 |
-45:09:06.6 |
HIP 104403 |
14.37 |