| 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 |
-1.6792 |
+1.675 |
| 2012-04-16 |
2020-11-24 |
+2.1626 |
-2.252 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-25 00:00 |
08:33:40.26 |
+04:38:10.1 |
HIP 42008 |
7.30 |
| 2026-09-25 12:00 |
08:33:41.93 |
+04:37:51.8 |
HIP 42008 |
7.57 |
| 2026-09-26 00:00 |
08:33:43.57 |
+04:37:33.5 |
HIP 42008 |
7.86 |
| 2026-09-26 12:00 |
08:33:45.18 |
+04:37:15.2 |
HIP 42008 |
8.18 |
| 2026-09-27 00:00 |
08:33:46.77 |
+04:36:57.0 |
HIP 42008 |
8.51 |
| 2026-09-27 12:00 |
08:33:48.33 |
+04:36:38.8 |
HIP 42008 |
8.86 |
| 2026-09-28 00:00 |
08:33:49.86 |
+04:36:20.6 |
HIP 42008 |
9.21 |
| 2026-09-28 12:00 |
08:33:51.36 |
+04:36:02.5 |
HIP 42008 |
9.58 |
| 2026-09-29 00:00 |
08:33:52.84 |
+04:35:44.4 |
HIP 42008 |
9.96 |
| 2026-09-29 12:00 |
08:33:54.28 |
+04:35:26.3 |
HIP 42008 |
10.34 |
| 2026-09-30 00:00 |
08:33:55.70 |
+04:35:08.3 |
HIP 42008 |
10.72 |
| 2026-09-30 12:00 |
08:33:57.09 |
+04:34:50.3 |
HIP 42008 |
11.11 |
| 2026-10-01 00:00 |
08:33:58.46 |
+04:34:32.4 |
HIP 42008 |
11.50 |
| 2026-10-01 12:00 |
08:33:59.79 |
+04:34:14.4 |
HIP 42008 |
11.90 |
| 2026-10-02 00:00 |
08:34:01.10 |
+04:33:56.6 |
HIP 42008 |
12.29 |
| 2026-10-02 12:00 |
08:34:02.37 |
+04:33:38.7 |
HIP 42008 |
12.68 |
| 2026-10-03 00:00 |
08:34:03.62 |
+04:33:21.0 |
HIP 42008 |
13.07 |
| 2026-10-03 12:00 |
08:34:04.84 |
+04:33:03.2 |
HIP 42008 |
13.46 |
| 2026-10-04 00:00 |
08:34:06.03 |
+04:32:45.5 |
HIP 42008 |
13.85 |
| 2026-10-04 12:00 |
08:34:07.19 |
+04:32:27.9 |
HIP 42008 |
14.24 |
| 2026-10-05 00:00 |
08:34:08.32 |
+04:32:10.3 |
HIP 42008 |
14.62 |
| 2026-10-05 12:00 |
08:34:09.41 |
+04:31:52.8 |
HIP 42008 |
15.00 |
| 2026-10-06 00:00 |
08:34:10.48 |
+04:31:35.3 |
HIP 42008 |
15.38 |
| 2026-10-06 12:00 |
08:34:11.52 |
+04:31:17.8 |
HIP 42008 |
15.76 |
| 2026-10-07 00:00 |
08:34:12.53 |
+04:31:00.5 |
HIP 42008 |
16.13 |
| 2026-10-07 12:00 |
08:34:13.51 |
+04:30:43.1 |
HIP 42008 |
16.50 |
| 2026-10-08 00:00 |
08:34:14.46 |
+04:30:25.9 |
HIP 42008 |
16.86 |
| 2026-10-08 12:00 |
08:34:15.37 |
+04:30:08.7 |
HIP 42008 |
17.22 |
| 2026-10-09 00:00 |
08:34:16.26 |
+04:29:51.6 |
HIP 42008 |
17.57 |
| 2026-10-09 12:00 |
08:34:17.11 |
+04:29:34.5 |
HIP 42008 |
17.93 |
| 2026-10-10 00:00 |
08:34:17.94 |
+04:29:17.5 |
HIP 42008 |
18.27 |
| 2026-10-10 12:00 |
08:34:18.73 |
+04:29:00.6 |
HIP 42008 |
18.61 |
| 2026-10-11 00:00 |
08:34:19.49 |
+04:28:43.7 |
HIP 42008 |
18.95 |
| 2026-10-11 12:00 |
08:34:20.22 |
+04:28:26.9 |
HIP 42008 |
19.28 |
| 2026-10-12 00:00 |
08:34:20.91 |
+04:28:10.2 |
HIP 42008 |
19.61 |
| 2026-10-12 12:00 |
08:34:21.58 |
+04:27:53.5 |
HIP 42008 |
19.93 |
| 2026-10-13 00:00 |
08:34:22.21 |
+04:27:37.0 |
HIP 42008 |
20.25 |
| 2026-10-13 12:00 |
08:34:22.81 |
+04:27:20.5 |
HIP 42008 |
20.56 |
| 2026-10-14 00:00 |
08:34:23.38 |
+04:27:04.1 |
HIP 42008 |
20.87 |
| 2026-10-14 12:00 |
08:34:23.92 |
+04:26:47.7 |
HIP 42008 |
21.18 |
| 2026-10-15 00:00 |
08:34:24.42 |
+04:26:31.5 |
HIP 42008 |
21.47 |
| 2026-10-15 12:00 |
08:34:24.89 |
+04:26:15.3 |
HIP 42008 |
21.77 |
| 2026-10-16 00:00 |
08:34:25.33 |
+04:25:59.2 |
HIP 42008 |
22.05 |