C/2006 S3 (LONEOS)
| Parameter |
Value |
| Designation |
C/2006 S3 (LONEOS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-04-16T07:55:48.486720Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:43:59Z |
| Obs used |
5568 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
7.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-22.0000000 |
| e |
1.00351612 |
| q (au) |
5.131152 |
| a (au) |
-1459.323142 |
| i (deg) |
166.032677 |
| Ω (om, deg) |
38.370869 |
| ω (w, deg) |
140.130175 |
| M (ma, deg) |
0.000100 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.516 + 2.867\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.516 |
| n |
2.867 |
| gf |
1.000 |
| gb |
-0.973 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2006-08-29 |
2012-04-16 |
-1.6774 |
+1.674 |
| 2012-04-16 |
2020-11-24 |
+2.1626 |
-2.251 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
08:29:38.95 |
+04:05:20.9 |
HIP 41705 |
9.35 |
| 2026-02-03 12:00 |
08:29:34.23 |
+04:05:40.6 |
HIP 41705 |
10.52 |
| 2026-02-04 00:00 |
08:29:29.52 |
+04:06:00.5 |
HIP 41705 |
11.70 |
| 2026-02-04 12:00 |
08:29:24.81 |
+04:06:20.5 |
HIP 41705 |
12.89 |
| 2026-02-05 00:00 |
08:29:20.12 |
+04:06:40.6 |
HIP 41705 |
14.08 |
| 2026-02-05 12:00 |
08:29:15.43 |
+04:07:00.9 |
HIP 41705 |
15.27 |
| 2026-02-06 00:00 |
08:29:10.74 |
+04:07:21.2 |
HIP 41705 |
16.46 |
| 2026-02-06 12:00 |
08:29:06.07 |
+04:07:41.6 |
HIP 41705 |
17.66 |
| 2026-02-07 00:00 |
08:29:01.41 |
+04:08:02.2 |
HIP 41705 |
18.85 |
| 2026-02-07 12:00 |
08:28:56.75 |
+04:08:22.9 |
HIP 41705 |
20.05 |
| 2026-02-08 00:00 |
08:28:52.11 |
+04:08:43.6 |
HIP 41705 |
21.24 |
| 2026-02-08 12:00 |
08:28:47.48 |
+04:09:04.5 |
HIP 41705 |
22.43 |
| 2026-02-09 00:00 |
08:28:42.85 |
+04:09:25.5 |
HIP 41705 |
23.63 |
| 2026-02-09 12:00 |
08:28:38.24 |
+04:09:46.6 |
HIP 41705 |
24.82 |
| 2026-02-10 00:00 |
08:28:33.64 |
+04:10:07.8 |
HIP 41705 |
26.01 |
| 2026-02-10 12:00 |
08:28:29.04 |
+04:10:29.0 |
HIP 41705 |
27.20 |
| 2026-02-11 00:00 |
08:28:24.46 |
+04:10:50.4 |
HIP 41705 |
28.38 |
| 2026-02-11 12:00 |
08:28:19.90 |
+04:11:11.9 |
HIP 41705 |
29.57 |
| 2026-02-12 00:00 |
08:28:15.34 |
+04:11:33.5 |
HIP 41705 |
30.75 |
| 2026-02-12 12:00 |
08:28:10.80 |
+04:11:55.1 |
HIP 41705 |
31.93 |
| 2026-02-13 00:00 |
08:28:06.27 |
+04:12:16.9 |
HIP 41705 |
33.11 |
| 2026-02-13 12:00 |
08:28:01.76 |
+04:12:38.7 |
HIP 41705 |
34.29 |
| 2026-02-14 00:00 |
08:27:57.25 |
+04:13:00.6 |
HIP 41705 |
35.46 |
| 2026-02-14 12:00 |
08:27:52.77 |
+04:13:22.6 |
HIP 41509 |
35.92 |
| 2026-02-15 00:00 |
08:27:48.30 |
+04:13:44.7 |
HIP 41509 |
35.60 |
| 2026-02-15 12:00 |
08:27:43.84 |
+04:14:06.9 |
HIP 41509 |
35.31 |
| 2026-02-16 00:00 |
08:27:39.40 |
+04:14:29.2 |
HIP 41509 |
35.05 |
| 2026-02-16 12:00 |
08:27:34.97 |
+04:14:51.5 |
HIP 41277 |
34.41 |
| 2026-02-17 00:00 |
08:27:30.56 |
+04:15:13.9 |
HIP 41277 |
33.31 |
| 2026-02-17 12:00 |
08:27:26.16 |
+04:15:36.4 |
HIP 41277 |
32.22 |
| 2026-02-18 00:00 |
08:27:21.79 |
+04:15:58.9 |
HIP 41277 |
31.13 |
| 2026-02-18 12:00 |
08:27:17.42 |
+04:16:21.5 |
HIP 41277 |
30.06 |
| 2026-02-19 00:00 |
08:27:13.08 |
+04:16:44.2 |
HIP 41277 |
28.99 |
| 2026-02-19 12:00 |
08:27:08.76 |
+04:17:07.0 |
HIP 41277 |
27.94 |
| 2026-02-20 00:00 |
08:27:04.45 |
+04:17:29.8 |
HIP 41277 |
26.90 |
| 2026-02-20 12:00 |
08:27:00.16 |
+04:17:52.7 |
HIP 41277 |
25.87 |
| 2026-02-21 00:00 |
08:26:55.89 |
+04:18:15.6 |
HIP 41277 |
24.85 |
| 2026-02-21 12:00 |
08:26:51.64 |
+04:18:38.6 |
HIP 41277 |
23.85 |
| 2026-02-22 00:00 |
08:26:47.40 |
+04:19:01.6 |
HIP 41277 |
22.87 |
| 2026-02-22 12:00 |
08:26:43.19 |
+04:19:24.8 |
HIP 41277 |
21.91 |
| 2026-02-23 00:00 |
08:26:39.00 |
+04:19:47.9 |
HIP 41277 |
20.96 |
| 2026-02-23 12:00 |
08:26:34.83 |
+04:20:11.1 |
HIP 41277 |
20.04 |
| 2026-02-24 00:00 |
08:26:30.67 |
+04:20:34.4 |
HIP 41277 |
19.14 |