| Parameter |
Value |
| Designation |
C/2000 S3 (LONEOS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-07-16T07:19:31.595520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
21.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2000-10-24.0000000 |
| e |
0.77228725 |
| q (au) |
2.662232 |
| a (au) |
11.691185 |
| i (deg) |
25.164344 |
| Ω (om, deg) |
41.153195 |
| ω (w, deg) |
298.271387 |
| M (ma, deg) |
2.458039 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.319 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.319 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.587 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
11:56:10.30 |
+21:24:13.4 |
HIP 58161 |
8.54 |
| 2026-06-01 12:00 |
11:56:08.89 |
+21:23:47.1 |
HIP 58161 |
8.01 |
| 2026-06-02 00:00 |
11:56:07.53 |
+21:23:20.5 |
HIP 58161 |
7.49 |
| 2026-06-02 12:00 |
11:56:06.21 |
+21:22:53.5 |
HIP 58161 |
6.98 |
| 2026-06-03 00:00 |
11:56:04.95 |
+21:22:26.2 |
HIP 58161 |
6.48 |
| 2026-06-03 12:00 |
11:56:03.73 |
+21:21:58.6 |
HIP 58161 |
6.00 |
| 2026-06-04 00:00 |
11:56:02.57 |
+21:21:30.6 |
HIP 58161 |
5.53 |
| 2026-06-04 12:00 |
11:56:01.45 |
+21:21:02.3 |
HIP 58161 |
5.09 |
| 2026-06-05 00:00 |
11:56:00.39 |
+21:20:33.7 |
HIP 58161 |
4.67 |
| 2026-06-05 12:00 |
11:55:59.37 |
+21:20:04.7 |
HIP 58161 |
4.30 |
| 2026-06-06 00:00 |
11:55:58.40 |
+21:19:35.5 |
HIP 58161 |
3.97 |
| 2026-06-06 12:00 |
11:55:57.48 |
+21:19:05.9 |
HIP 58161 |
3.70 |
| 2026-06-07 00:00 |
11:55:56.61 |
+21:18:36.0 |
HIP 58161 |
3.50 |
| 2026-06-07 12:00 |
11:55:55.79 |
+21:18:05.8 |
HIP 58161 |
3.39 |
| 2026-06-08 00:00 |
11:55:55.03 |
+21:17:35.2 |
HIP 58161 |
3.38 |
| 2026-06-08 12:00 |
11:55:54.31 |
+21:17:04.4 |
HIP 58161 |
3.47 |
| 2026-06-09 00:00 |
11:55:53.64 |
+21:16:33.2 |
HIP 58161 |
3.64 |
| 2026-06-09 12:00 |
11:55:53.02 |
+21:16:01.8 |
HIP 58161 |
3.90 |
| 2026-06-10 00:00 |
11:55:52.45 |
+21:15:30.0 |
HIP 58161 |
4.22 |
| 2026-06-10 12:00 |
11:55:51.93 |
+21:14:57.9 |
HIP 58161 |
4.60 |
| 2026-06-11 00:00 |
11:55:51.46 |
+21:14:25.5 |
HIP 58161 |
5.02 |
| 2026-06-11 12:00 |
11:55:51.04 |
+21:13:52.8 |
HIP 58161 |
5.47 |
| 2026-06-12 00:00 |
11:55:50.67 |
+21:13:19.8 |
HIP 58161 |
5.95 |
| 2026-06-12 12:00 |
11:55:50.35 |
+21:12:46.6 |
HIP 58161 |
6.44 |
| 2026-06-13 00:00 |
11:55:50.08 |
+21:12:13.0 |
HIP 58161 |
6.96 |
| 2026-06-13 12:00 |
11:55:49.86 |
+21:11:39.1 |
HIP 58161 |
7.49 |
| 2026-06-14 00:00 |
11:55:49.69 |
+21:11:05.0 |
HIP 58161 |
8.03 |
| 2026-06-14 12:00 |
11:55:49.57 |
+21:10:30.5 |
HIP 58161 |
8.59 |
| 2026-06-15 00:00 |
11:55:49.50 |
+21:09:55.8 |
HIP 58161 |
9.15 |
| 2026-06-15 12:00 |
11:55:49.48 |
+21:09:20.8 |
HIP 58161 |
9.72 |
| 2026-06-16 00:00 |
11:55:49.51 |
+21:08:45.5 |
HIP 58161 |
10.30 |
| 2026-06-16 12:00 |
11:55:49.59 |
+21:08:09.9 |
HIP 58161 |
10.89 |
| 2026-06-17 00:00 |
11:55:49.72 |
+21:07:34.1 |
HIP 58161 |
11.48 |
| 2026-06-17 12:00 |
11:55:49.90 |
+21:06:57.9 |
HIP 58161 |
12.08 |
| 2026-06-18 00:00 |
11:55:50.13 |
+21:06:21.5 |
HIP 58161 |
12.69 |
| 2026-06-18 12:00 |
11:55:50.41 |
+21:05:44.9 |
HIP 58161 |
13.30 |
| 2026-06-19 00:00 |
11:55:50.74 |
+21:05:08.0 |
HIP 58161 |
13.92 |
| 2026-06-19 12:00 |
11:55:51.12 |
+21:04:30.8 |
HIP 58161 |
14.55 |
| 2026-06-20 00:00 |
11:55:51.54 |
+21:03:53.4 |
HIP 58161 |
15.18 |
| 2026-06-20 12:00 |
11:55:52.02 |
+21:03:15.7 |
HIP 58161 |
15.82 |
| 2026-06-21 00:00 |
11:55:52.55 |
+21:02:37.7 |
HIP 58161 |
16.46 |
| 2026-06-21 12:00 |
11:55:53.13 |
+21:01:59.5 |
HIP 58161 |
17.11 |
| 2026-06-22 00:00 |
11:55:53.75 |
+21:01:21.1 |
HIP 58161 |
17.77 |