| 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) |
| 2026-07-29 00:00 |
08:28:17.75 |
+05:10:31.9 |
HIP 41509 |
21.91 |
| 2026-07-29 12:00 |
08:28:21.12 |
+05:10:19.4 |
HIP 41509 |
21.93 |
| 2026-07-30 00:00 |
08:28:24.50 |
+05:10:06.8 |
HIP 41509 |
21.99 |
| 2026-07-30 12:00 |
08:28:27.87 |
+05:09:54.2 |
HIP 41509 |
22.08 |
| 2026-07-31 00:00 |
08:28:31.24 |
+05:09:41.4 |
HIP 41605 |
22.02 |
| 2026-07-31 12:00 |
08:28:34.60 |
+05:09:28.5 |
HIP 41605 |
21.60 |
| 2026-08-01 00:00 |
08:28:37.97 |
+05:09:15.5 |
HIP 41605 |
21.21 |
| 2026-08-01 12:00 |
08:28:41.33 |
+05:09:02.3 |
HIP 41605 |
20.84 |
| 2026-08-02 00:00 |
08:28:44.69 |
+05:08:49.1 |
HIP 41605 |
20.51 |
| 2026-08-02 12:00 |
08:28:48.05 |
+05:08:35.7 |
HIP 41699 |
19.84 |
| 2026-08-03 00:00 |
08:28:51.40 |
+05:08:22.3 |
HIP 41699 |
19.08 |
| 2026-08-03 12:00 |
08:28:54.75 |
+05:08:08.7 |
HIP 41699 |
18.33 |
| 2026-08-04 00:00 |
08:28:58.10 |
+05:07:55.1 |
HIP 41699 |
17.60 |
| 2026-08-04 12:00 |
08:29:01.44 |
+05:07:41.3 |
HIP 41699 |
16.88 |
| 2026-08-05 00:00 |
08:29:04.78 |
+05:07:27.4 |
HIP 41699 |
16.17 |
| 2026-08-05 12:00 |
08:29:08.12 |
+05:07:13.4 |
HIP 41699 |
15.48 |
| 2026-08-06 00:00 |
08:29:11.45 |
+05:06:59.3 |
HIP 41699 |
14.81 |
| 2026-08-06 12:00 |
08:29:14.77 |
+05:06:45.2 |
HIP 41699 |
14.16 |
| 2026-08-07 00:00 |
08:29:18.09 |
+05:06:30.9 |
HIP 41699 |
13.54 |
| 2026-08-07 12:00 |
08:29:21.41 |
+05:06:16.5 |
HIP 41699 |
12.95 |
| 2026-08-08 00:00 |
08:29:24.72 |
+05:06:02.0 |
HIP 41699 |
12.39 |
| 2026-08-08 12:00 |
08:29:28.02 |
+05:05:47.4 |
HIP 41699 |
11.87 |
| 2026-08-09 00:00 |
08:29:31.32 |
+05:05:32.7 |
HIP 41699 |
11.40 |
| 2026-08-09 12:00 |
08:29:34.61 |
+05:05:17.9 |
HIP 41699 |
10.97 |
| 2026-08-10 00:00 |
08:29:37.90 |
+05:05:03.1 |
HIP 41699 |
10.60 |
| 2026-08-10 12:00 |
08:29:41.18 |
+05:04:48.1 |
HIP 41699 |
10.28 |
| 2026-08-11 00:00 |
08:29:44.45 |
+05:04:33.0 |
HIP 41699 |
10.03 |
| 2026-08-11 12:00 |
08:29:47.71 |
+05:04:17.9 |
HIP 41699 |
9.85 |
| 2026-08-12 00:00 |
08:29:50.97 |
+05:04:02.6 |
HIP 41699 |
9.75 |
| 2026-08-12 12:00 |
08:29:54.22 |
+05:03:47.3 |
HIP 41699 |
9.72 |
| 2026-08-13 00:00 |
08:29:57.46 |
+05:03:31.9 |
HIP 41699 |
9.76 |
| 2026-08-13 12:00 |
08:30:00.69 |
+05:03:16.4 |
HIP 41699 |
9.88 |
| 2026-08-14 00:00 |
08:30:03.91 |
+05:03:00.8 |
HIP 41699 |
10.08 |
| 2026-08-14 12:00 |
08:30:07.13 |
+05:02:45.1 |
HIP 41699 |
10.33 |
| 2026-08-15 00:00 |
08:30:10.33 |
+05:02:29.3 |
HIP 41699 |
10.65 |
| 2026-08-15 12:00 |
08:30:13.53 |
+05:02:13.5 |
HIP 41699 |
11.03 |
| 2026-08-16 00:00 |
08:30:16.71 |
+05:01:57.5 |
HIP 41699 |
11.45 |
| 2026-08-16 12:00 |
08:30:19.89 |
+05:01:41.5 |
HIP 41699 |
11.92 |
| 2026-08-17 00:00 |
08:30:23.05 |
+05:01:25.4 |
HIP 41699 |
12.43 |
| 2026-08-17 12:00 |
08:30:26.21 |
+05:01:09.3 |
HIP 41699 |
12.97 |
| 2026-08-18 00:00 |
08:30:29.35 |
+05:00:53.0 |
HIP 41699 |
13.55 |
| 2026-08-18 12:00 |
08:30:32.49 |
+05:00:36.7 |
HIP 41699 |
14.14 |
| 2026-08-19 00:00 |
08:30:35.61 |
+05:00:20.3 |
HIP 41699 |
14.76 |