| Parameter |
Value |
| Designation |
C/2006 S2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-07T08:26:31.346880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:59Z |
| Obs used |
175 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-12-27.0000000 |
| e |
1.00195952 |
| q (au) |
3.161510 |
| a (au) |
-1613.414402 |
| i (deg) |
98.959134 |
| Ω (om, deg) |
113.887214 |
| ω (w, deg) |
166.340993 |
| M (ma, deg) |
-0.001998 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.406 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.406 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
07:41:29.05 |
-25:06:51.0 |
HIP 37506 |
6.39 |
| 2026-07-29 12:00 |
07:41:32.29 |
-25:07:00.6 |
HIP 37506 |
5.99 |
| 2026-07-30 00:00 |
07:41:35.52 |
-25:07:10.5 |
HIP 37506 |
5.67 |
| 2026-07-30 12:00 |
07:41:38.75 |
-25:07:20.5 |
HIP 37506 |
5.44 |
| 2026-07-31 00:00 |
07:41:41.97 |
-25:07:30.9 |
HIP 37506 |
5.31 |
| 2026-07-31 12:00 |
07:41:45.18 |
-25:07:41.5 |
HIP 37506 |
5.28 |
| 2026-08-01 00:00 |
07:41:48.39 |
-25:07:52.4 |
HIP 37506 |
5.37 |
| 2026-08-01 12:00 |
07:41:51.59 |
-25:08:03.5 |
HIP 37506 |
5.57 |
| 2026-08-02 00:00 |
07:41:54.78 |
-25:08:14.8 |
HIP 37506 |
5.85 |
| 2026-08-02 12:00 |
07:41:57.96 |
-25:08:26.5 |
HIP 37506 |
6.22 |
| 2026-08-03 00:00 |
07:42:01.14 |
-25:08:38.3 |
HIP 37506 |
6.65 |
| 2026-08-03 12:00 |
07:42:04.31 |
-25:08:50.5 |
HIP 37506 |
7.14 |
| 2026-08-04 00:00 |
07:42:07.47 |
-25:09:02.8 |
HIP 37506 |
7.67 |
| 2026-08-04 12:00 |
07:42:10.62 |
-25:09:15.5 |
HIP 37506 |
8.24 |
| 2026-08-05 00:00 |
07:42:13.76 |
-25:09:28.3 |
HIP 37506 |
8.84 |
| 2026-08-05 12:00 |
07:42:16.89 |
-25:09:41.5 |
HIP 37506 |
9.46 |
| 2026-08-06 00:00 |
07:42:20.02 |
-25:09:54.8 |
HIP 37506 |
10.09 |
| 2026-08-06 12:00 |
07:42:23.14 |
-25:10:08.4 |
HIP 37506 |
10.75 |
| 2026-08-07 00:00 |
07:42:26.24 |
-25:10:22.3 |
HIP 37506 |
11.41 |
| 2026-08-07 12:00 |
07:42:29.34 |
-25:10:36.4 |
HIP 37506 |
12.08 |
| 2026-08-08 00:00 |
07:42:32.43 |
-25:10:50.8 |
HIP 37506 |
12.77 |
| 2026-08-08 12:00 |
07:42:35.50 |
-25:11:05.3 |
HIP 37506 |
13.45 |
| 2026-08-09 00:00 |
07:42:38.57 |
-25:11:20.2 |
HIP 37506 |
14.15 |
| 2026-08-09 12:00 |
07:42:41.63 |
-25:11:35.3 |
HIP 37506 |
14.85 |
| 2026-08-10 00:00 |
07:42:44.67 |
-25:11:50.6 |
HIP 37506 |
15.55 |
| 2026-08-10 12:00 |
07:42:47.71 |
-25:12:06.1 |
HIP 37506 |
16.26 |
| 2026-08-11 00:00 |
07:42:50.73 |
-25:12:21.9 |
HIP 37506 |
16.97 |
| 2026-08-11 12:00 |
07:42:53.74 |
-25:12:37.9 |
HIP 37506 |
17.68 |
| 2026-08-12 00:00 |
07:42:56.74 |
-25:12:54.2 |
HIP 37506 |
18.39 |
| 2026-08-12 12:00 |
07:42:59.73 |
-25:13:10.7 |
HIP 37506 |
19.10 |
| 2026-08-13 00:00 |
07:43:02.71 |
-25:13:27.4 |
HIP 37660 |
18.68 |
| 2026-08-13 12:00 |
07:43:05.67 |
-25:13:44.4 |
HIP 37660 |
18.14 |
| 2026-08-14 00:00 |
07:43:08.62 |
-25:14:01.6 |
HIP 37660 |
17.61 |
| 2026-08-14 12:00 |
07:43:11.56 |
-25:14:19.0 |
HIP 37660 |
17.09 |
| 2026-08-15 00:00 |
07:43:14.49 |
-25:14:36.6 |
HIP 37660 |
16.58 |
| 2026-08-15 12:00 |
07:43:17.40 |
-25:14:54.5 |
HIP 37660 |
16.09 |
| 2026-08-16 00:00 |
07:43:20.30 |
-25:15:12.6 |
HIP 37660 |
15.61 |
| 2026-08-16 12:00 |
07:43:23.19 |
-25:15:30.9 |
HIP 37660 |
15.15 |
| 2026-08-17 00:00 |
07:43:26.06 |
-25:15:49.4 |
HIP 37660 |
14.70 |
| 2026-08-17 12:00 |
07:43:28.92 |
-25:16:08.2 |
HIP 37660 |
14.28 |
| 2026-08-18 00:00 |
07:43:31.76 |
-25:16:27.2 |
HIP 37660 |
13.88 |
| 2026-08-18 12:00 |
07:43:34.59 |
-25:16:46.4 |
HIP 37660 |
13.50 |
| 2026-08-19 00:00 |
07:43:37.41 |
-25:17:05.8 |
HIP 37660 |
13.14 |