| Parameter |
Value |
| Designation |
150P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-07-24T06:54:40.201920Z |
| Orbit solution date (soln_date, UTC) |
2024-07-13T19:12:21Z |
| Obs used |
1320 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-07-24.0000000 |
| e |
0.54650135 |
| q (au) |
1.759826 |
| a (au) |
3.880555 |
| i (deg) |
18.508218 |
| Ω (om, deg) |
272.407983 |
| ω (w, deg) |
245.615019 |
| M (ma, deg) |
141.144278 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.918 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.918 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.616 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:09:12.69 |
-04:43:20.9 |
HIP 104433 |
13.89 |
| 2026-05-12 12:00 |
21:09:16.17 |
-04:41:27.4 |
HIP 104433 |
15.72 |
| 2026-05-13 00:00 |
21:09:19.46 |
-04:39:34.4 |
HIP 104383 |
16.33 |
| 2026-05-13 12:00 |
21:09:22.58 |
-04:37:42.1 |
HIP 104383 |
15.22 |
| 2026-05-14 00:00 |
21:09:25.51 |
-04:35:50.5 |
HIP 104383 |
14.28 |
| 2026-05-14 12:00 |
21:09:28.26 |
-04:33:59.4 |
HIP 104383 |
13.55 |
| 2026-05-15 00:00 |
21:09:30.83 |
-04:32:09.0 |
HIP 104383 |
13.05 |
| 2026-05-15 12:00 |
21:09:33.21 |
-04:30:19.3 |
HIP 104383 |
12.79 |
| 2026-05-16 00:00 |
21:09:35.41 |
-04:28:30.3 |
HIP 104383 |
12.77 |
| 2026-05-16 12:00 |
21:09:37.43 |
-04:26:41.9 |
HIP 104383 |
12.99 |
| 2026-05-17 00:00 |
21:09:39.26 |
-04:24:54.2 |
HIP 104383 |
13.42 |
| 2026-05-17 12:00 |
21:09:40.91 |
-04:23:07.2 |
HIP 104383 |
14.03 |
| 2026-05-18 00:00 |
21:09:42.37 |
-04:21:20.9 |
HIP 104383 |
14.80 |
| 2026-05-18 12:00 |
21:09:43.65 |
-04:19:35.3 |
HIP 104383 |
15.69 |
| 2026-05-19 00:00 |
21:09:44.74 |
-04:17:50.4 |
HIP 104383 |
16.68 |
| 2026-05-19 12:00 |
21:09:45.65 |
-04:16:06.2 |
HIP 104383 |
17.75 |
| 2026-05-20 00:00 |
21:09:46.37 |
-04:14:22.8 |
HIP 104383 |
18.87 |
| 2026-05-20 12:00 |
21:09:46.90 |
-04:12:40.0 |
HIP 104383 |
20.04 |
| 2026-05-21 00:00 |
21:09:47.25 |
-04:10:58.0 |
HIP 104435 |
18.77 |
| 2026-05-21 12:00 |
21:09:47.41 |
-04:09:16.8 |
HIP 104435 |
17.23 |
| 2026-05-22 00:00 |
21:09:47.38 |
-04:07:36.3 |
HIP 104435 |
15.71 |
| 2026-05-22 12:00 |
21:09:47.17 |
-04:05:56.5 |
HIP 104435 |
14.22 |
| 2026-05-23 00:00 |
21:09:46.77 |
-04:04:17.6 |
HIP 104435 |
12.75 |
| 2026-05-23 12:00 |
21:09:46.19 |
-04:02:39.3 |
HIP 104435 |
11.32 |
| 2026-05-24 00:00 |
21:09:45.42 |
-04:01:01.9 |
HIP 104435 |
9.93 |
| 2026-05-24 12:00 |
21:09:44.46 |
-03:59:25.2 |
HIP 104435 |
8.61 |
| 2026-05-25 00:00 |
21:09:43.32 |
-03:57:49.3 |
HIP 104435 |
7.38 |
| 2026-05-25 12:00 |
21:09:41.98 |
-03:56:14.2 |
HIP 104435 |
6.28 |
| 2026-05-26 00:00 |
21:09:40.46 |
-03:54:39.9 |
HIP 104435 |
5.42 |
| 2026-05-26 12:00 |
21:09:38.76 |
-03:53:06.4 |
HIP 104435 |
4.90 |
| 2026-05-27 00:00 |
21:09:36.87 |
-03:51:33.7 |
HIP 104435 |
4.83 |
| 2026-05-27 12:00 |
21:09:34.79 |
-03:50:01.9 |
HIP 104435 |
5.24 |
| 2026-05-28 00:00 |
21:09:32.52 |
-03:48:30.8 |
HIP 104435 |
6.03 |
| 2026-05-28 12:00 |
21:09:30.06 |
-03:47:00.6 |
HIP 104435 |
7.08 |
| 2026-05-29 00:00 |
21:09:27.42 |
-03:45:31.2 |
HIP 104435 |
8.29 |
| 2026-05-29 12:00 |
21:09:24.59 |
-03:44:02.6 |
HIP 104435 |
9.60 |
| 2026-05-30 00:00 |
21:09:21.58 |
-03:42:34.9 |
HIP 104435 |
10.99 |
| 2026-05-30 12:00 |
21:09:18.38 |
-03:41:08.0 |
HIP 104435 |
12.42 |
| 2026-05-31 00:00 |
21:09:14.99 |
-03:39:42.0 |
HIP 104435 |
13.89 |
| 2026-05-31 12:00 |
21:09:11.41 |
-03:38:16.8 |
HIP 104435 |
15.39 |
| 2026-06-01 00:00 |
21:09:07.64 |
-03:36:52.5 |
HIP 104435 |
16.92 |
| 2026-06-01 12:00 |
21:09:03.69 |
-03:35:29.1 |
HIP 104435 |
18.48 |
| 2026-06-02 00:00 |
21:08:59.56 |
-03:34:06.6 |
HIP 104435 |
20.05 |