| 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) |
| 2026-09-20 00:00 |
07:45:59.41 |
-25:43:59.9 |
HIP 37746 |
20.77 |
| 2026-09-20 12:00 |
07:46:00.91 |
-25:44:29.6 |
HIP 37746 |
21.25 |
| 2026-09-21 00:00 |
07:46:02.39 |
-25:44:59.4 |
HIP 37746 |
21.72 |
| 2026-09-21 12:00 |
07:46:03.84 |
-25:45:29.4 |
HIP 37746 |
22.20 |
| 2026-09-22 00:00 |
07:46:05.27 |
-25:45:59.4 |
HIP 37746 |
22.68 |
| 2026-09-22 12:00 |
07:46:06.67 |
-25:46:29.5 |
HIP 37746 |
23.16 |
| 2026-09-23 00:00 |
07:46:08.04 |
-25:46:59.7 |
HIP 37746 |
23.64 |
| 2026-09-23 12:00 |
07:46:09.39 |
-25:47:29.9 |
HIP 37746 |
24.12 |
| 2026-09-24 00:00 |
07:46:10.72 |
-25:48:00.3 |
HIP 37746 |
24.59 |
| 2026-09-24 12:00 |
07:46:12.01 |
-25:48:30.7 |
HIP 37746 |
25.07 |
| 2026-09-25 00:00 |
07:46:13.28 |
-25:49:01.2 |
HIP 37746 |
25.55 |
| 2026-09-25 12:00 |
07:46:14.53 |
-25:49:31.8 |
HIP 38070 |
25.77 |
| 2026-09-26 00:00 |
07:46:15.75 |
-25:50:02.4 |
HIP 38070 |
25.38 |
| 2026-09-26 12:00 |
07:46:16.94 |
-25:50:33.1 |
HIP 38070 |
25.00 |
| 2026-09-27 00:00 |
07:46:18.11 |
-25:51:03.9 |
HIP 38070 |
24.63 |
| 2026-09-27 12:00 |
07:46:19.25 |
-25:51:34.7 |
HIP 38070 |
24.27 |
| 2026-09-28 00:00 |
07:46:20.36 |
-25:52:05.6 |
HIP 38070 |
23.93 |
| 2026-09-28 12:00 |
07:46:21.44 |
-25:52:36.6 |
HIP 38070 |
23.61 |
| 2026-09-29 00:00 |
07:46:22.50 |
-25:53:07.6 |
HIP 38070 |
23.30 |
| 2026-09-29 12:00 |
07:46:23.53 |
-25:53:38.7 |
HIP 38070 |
23.00 |
| 2026-09-30 00:00 |
07:46:24.54 |
-25:54:09.8 |
HIP 38070 |
22.72 |
| 2026-09-30 12:00 |
07:46:25.52 |
-25:54:41.0 |
HIP 38070 |
22.46 |
| 2026-10-01 00:00 |
07:46:26.47 |
-25:55:12.2 |
HIP 38070 |
22.22 |
| 2026-10-01 12:00 |
07:46:27.39 |
-25:55:43.5 |
HIP 38070 |
21.99 |
| 2026-10-02 00:00 |
07:46:28.28 |
-25:56:14.8 |
HIP 38070 |
21.78 |
| 2026-10-02 12:00 |
07:46:29.15 |
-25:56:46.2 |
HIP 38070 |
21.59 |
| 2026-10-03 00:00 |
07:46:29.99 |
-25:57:17.6 |
HIP 38070 |
21.42 |
| 2026-10-03 12:00 |
07:46:30.80 |
-25:57:49.0 |
HIP 38070 |
21.27 |
| 2026-10-04 00:00 |
07:46:31.58 |
-25:58:20.5 |
HIP 38070 |
21.14 |
| 2026-10-04 12:00 |
07:46:32.34 |
-25:58:52.0 |
HIP 38070 |
21.03 |
| 2026-10-05 00:00 |
07:46:33.07 |
-25:59:23.6 |
HIP 38070 |
20.94 |
| 2026-10-05 12:00 |
07:46:33.77 |
-25:59:55.1 |
HIP 38070 |
20.87 |
| 2026-10-06 00:00 |
07:46:34.44 |
-26:00:26.7 |
HIP 38070 |
20.82 |
| 2026-10-06 12:00 |
07:46:35.08 |
-26:00:58.4 |
HIP 38070 |
20.80 |
| 2026-10-07 00:00 |
07:46:35.69 |
-26:01:30.0 |
HIP 38070 |
20.79 |
| 2026-10-07 12:00 |
07:46:36.28 |
-26:02:01.6 |
HIP 38070 |
20.80 |
| 2026-10-08 00:00 |
07:46:36.84 |
-26:02:33.3 |
HIP 38070 |
20.83 |
| 2026-10-08 12:00 |
07:46:37.36 |
-26:03:05.0 |
HIP 37933 |
20.45 |
| 2026-10-09 00:00 |
07:46:37.86 |
-26:03:36.7 |
HIP 37933 |
19.94 |
| 2026-10-09 12:00 |
07:46:38.33 |
-26:04:08.4 |
HIP 37933 |
19.44 |
| 2026-10-10 00:00 |
07:46:38.77 |
-26:04:40.1 |
HIP 37933 |
18.93 |
| 2026-10-10 12:00 |
07:46:39.18 |
-26:05:11.8 |
HIP 37933 |
18.42 |
| 2026-10-11 00:00 |
07:46:39.57 |
-26:05:43.5 |
HIP 37933 |
17.92 |