150P/LONEOS
| 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) |
| 2026-02-03 00:00 |
20:13:28.09 |
-12:06:22.6 |
HIP 99514 |
24.79 |
| 2026-02-03 12:00 |
20:13:54.22 |
-12:04:17.2 |
HIP 99795 |
29.60 |
| 2026-02-04 00:00 |
20:14:20.31 |
-12:02:11.5 |
HIP 99795 |
25.17 |
| 2026-02-04 12:00 |
20:14:46.34 |
-12:00:05.4 |
HIP 99795 |
21.93 |
| 2026-02-05 00:00 |
20:15:12.33 |
-11:57:59.0 |
HIP 99883 |
19.31 |
| 2026-02-05 12:00 |
20:15:38.27 |
-11:55:52.2 |
HIP 99883 |
14.69 |
| 2026-02-06 00:00 |
20:16:04.15 |
-11:53:45.1 |
HIP 99883 |
12.18 |
| 2026-02-06 12:00 |
20:16:29.99 |
-11:51:37.5 |
HIP 99883 |
13.03 |
| 2026-02-07 00:00 |
20:16:55.77 |
-11:49:29.7 |
HIP 99883 |
16.72 |
| 2026-02-07 12:00 |
20:17:21.50 |
-11:47:21.5 |
HIP 99883 |
21.85 |
| 2026-02-08 00:00 |
20:17:47.18 |
-11:45:12.9 |
HIP 99883 |
27.63 |
| 2026-02-08 12:00 |
20:18:12.80 |
-11:43:04.0 |
HIP 99883 |
33.71 |
| 2026-02-09 00:00 |
20:18:38.37 |
-11:40:54.8 |
HIP 99883 |
39.96 |
| 2026-02-09 12:00 |
20:19:03.89 |
-11:38:45.2 |
HIP 99883 |
46.30 |
| 2026-02-10 00:00 |
20:19:29.35 |
-11:36:35.3 |
HIP 100347 |
43.84 |
| 2026-02-10 12:00 |
20:19:54.75 |
-11:34:25.0 |
HIP 100347 |
39.01 |
| 2026-02-11 00:00 |
20:20:20.09 |
-11:32:14.4 |
HIP 100347 |
34.76 |
| 2026-02-11 12:00 |
20:20:45.38 |
-11:30:03.5 |
HIP 100347 |
31.33 |
| 2026-02-12 00:00 |
20:21:10.60 |
-11:27:52.3 |
HIP 100347 |
29.00 |
| 2026-02-12 12:00 |
20:21:35.77 |
-11:25:40.8 |
HIP 100347 |
28.03 |
| 2026-02-13 00:00 |
20:22:00.88 |
-11:23:28.9 |
HIP 100347 |
28.56 |
| 2026-02-13 12:00 |
20:22:25.92 |
-11:21:16.8 |
HIP 100544 |
30.46 |
| 2026-02-14 00:00 |
20:22:50.91 |
-11:19:04.3 |
HIP 100544 |
26.59 |
| 2026-02-14 12:00 |
20:23:15.83 |
-11:16:51.5 |
HIP 100544 |
23.88 |
| 2026-02-15 00:00 |
20:23:40.69 |
-11:14:38.5 |
HIP 100544 |
22.76 |
| 2026-02-15 12:00 |
20:24:05.48 |
-11:12:25.1 |
HIP 100544 |
23.43 |
| 2026-02-16 00:00 |
20:24:30.21 |
-11:10:11.4 |
HIP 100544 |
25.75 |
| 2026-02-16 12:00 |
20:24:54.87 |
-11:07:57.5 |
HIP 100544 |
29.33 |
| 2026-02-17 00:00 |
20:25:19.47 |
-11:05:43.3 |
HIP 100601 |
32.64 |
| 2026-02-17 12:00 |
20:25:44.00 |
-11:03:28.8 |
HIP 100601 |
35.02 |
| 2026-02-18 00:00 |
20:26:08.46 |
-11:01:14.0 |
HIP 100869 |
34.87 |
| 2026-02-18 12:00 |
20:26:32.85 |
-10:58:58.9 |
HIP 100997 |
31.10 |
| 2026-02-19 00:00 |
20:26:57.17 |
-10:56:43.6 |
HIP 100997 |
25.94 |
| 2026-02-19 12:00 |
20:27:21.42 |
-10:54:28.0 |
HIP 100997 |
21.47 |
| 2026-02-20 00:00 |
20:27:45.61 |
-10:52:12.2 |
HIP 100997 |
18.17 |
| 2026-02-20 12:00 |
20:28:09.71 |
-10:49:56.1 |
HIP 100997 |
16.75 |
| 2026-02-21 00:00 |
20:28:33.75 |
-10:47:39.7 |
HIP 100997 |
17.65 |
| 2026-02-21 12:00 |
20:28:57.71 |
-10:45:23.2 |
HIP 100997 |
20.55 |
| 2026-02-22 00:00 |
20:29:21.60 |
-10:43:06.3 |
HIP 100997 |
24.75 |
| 2026-02-22 12:00 |
20:29:45.41 |
-10:40:49.3 |
HIP 100997 |
29.69 |
| 2026-02-23 00:00 |
20:30:09.15 |
-10:38:32.0 |
HIP 100997 |
35.05 |
| 2026-02-23 12:00 |
20:30:32.81 |
-10:36:14.5 |
HIP 101209 |
34.59 |
| 2026-02-24 00:00 |
20:30:56.40 |
-10:33:56.7 |
HIP 101209 |
31.83 |