| Parameter |
Value |
| Designation |
359P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-08-21T04:24:35.637120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:34Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
14.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-04-16.0000000 |
| e |
0.32248320 |
| q (au) |
3.137799 |
| a (au) |
4.631322 |
| i (deg) |
10.262827 |
| Ω (om, deg) |
149.806429 |
| ω (w, deg) |
200.248458 |
| M (ma, deg) |
275.135344 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.703 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.703 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
18:05:32.96 |
-13:11:55.0 |
HIP 88748 |
21.86 |
| 2026-07-29 12:00 |
18:05:20.54 |
-13:13:24.2 |
HIP 88748 |
24.78 |
| 2026-07-30 00:00 |
18:05:08.33 |
-13:14:53.9 |
HIP 88748 |
27.75 |
| 2026-07-30 12:00 |
18:04:56.33 |
-13:16:24.1 |
HIP 88748 |
30.74 |
| 2026-07-31 00:00 |
18:04:44.56 |
-13:17:54.8 |
HIP 88748 |
33.73 |
| 2026-07-31 12:00 |
18:04:33.02 |
-13:19:25.9 |
HIP 88462 |
35.45 |
| 2026-08-01 00:00 |
18:04:21.70 |
-13:20:57.5 |
HIP 88462 |
36.07 |
| 2026-08-01 12:00 |
18:04:10.61 |
-13:22:29.6 |
HIP 88301 |
35.35 |
| 2026-08-02 00:00 |
18:03:59.75 |
-13:24:02.0 |
HIP 88301 |
33.60 |
| 2026-08-02 12:00 |
18:03:49.12 |
-13:25:34.9 |
HIP 88301 |
32.09 |
| 2026-08-03 00:00 |
18:03:38.73 |
-13:27:08.3 |
HIP 88301 |
30.86 |
| 2026-08-03 12:00 |
18:03:28.57 |
-13:28:42.0 |
HIP 88301 |
29.92 |
| 2026-08-04 00:00 |
18:03:18.66 |
-13:30:16.2 |
HIP 88301 |
29.29 |
| 2026-08-04 12:00 |
18:03:08.98 |
-13:31:50.7 |
HIP 88301 |
28.97 |
| 2026-08-05 00:00 |
18:02:59.55 |
-13:33:25.6 |
HIP 88301 |
28.96 |
| 2026-08-05 12:00 |
18:02:50.36 |
-13:35:01.0 |
HIP 88301 |
29.26 |
| 2026-08-06 00:00 |
18:02:41.41 |
-13:36:36.6 |
HIP 88301 |
29.83 |
| 2026-08-06 12:00 |
18:02:32.72 |
-13:38:12.7 |
HIP 88201 |
27.87 |
| 2026-08-07 00:00 |
18:02:24.28 |
-13:39:49.1 |
HIP 88201 |
25.43 |
| 2026-08-07 12:00 |
18:02:16.09 |
-13:41:25.8 |
HIP 88201 |
23.10 |
| 2026-08-08 00:00 |
18:02:08.15 |
-13:43:02.9 |
HIP 88201 |
20.88 |
| 2026-08-08 12:00 |
18:02:00.47 |
-13:44:40.3 |
HIP 88201 |
18.79 |
| 2026-08-09 00:00 |
18:01:53.04 |
-13:46:18.0 |
HIP 88201 |
16.87 |
| 2026-08-09 12:00 |
18:01:45.88 |
-13:47:56.0 |
HIP 88201 |
15.16 |
| 2026-08-10 00:00 |
18:01:38.97 |
-13:49:34.3 |
HIP 88201 |
13.73 |
| 2026-08-10 12:00 |
18:01:32.33 |
-13:51:12.9 |
HIP 88201 |
12.62 |
| 2026-08-11 00:00 |
18:01:25.95 |
-13:52:51.8 |
HIP 88201 |
11.93 |
| 2026-08-11 12:00 |
18:01:19.84 |
-13:54:30.9 |
HIP 88201 |
11.69 |
| 2026-08-12 00:00 |
18:01:13.99 |
-13:56:10.3 |
HIP 88201 |
11.92 |
| 2026-08-12 12:00 |
18:01:08.42 |
-13:57:50.0 |
HIP 88201 |
12.56 |
| 2026-08-13 00:00 |
18:01:03.11 |
-13:59:29.9 |
HIP 88201 |
13.54 |
| 2026-08-13 12:00 |
18:00:58.07 |
-14:01:10.0 |
HIP 88160 |
14.53 |
| 2026-08-14 00:00 |
18:00:53.31 |
-14:02:50.3 |
HIP 88160 |
12.50 |
| 2026-08-14 12:00 |
18:00:48.82 |
-14:04:30.8 |
HIP 88160 |
10.52 |
| 2026-08-15 00:00 |
18:00:44.60 |
-14:06:11.5 |
HIP 88160 |
8.58 |
| 2026-08-15 12:00 |
18:00:40.66 |
-14:07:52.5 |
HIP 88160 |
6.72 |
| 2026-08-16 00:00 |
18:00:36.99 |
-14:09:33.5 |
HIP 88160 |
4.95 |
| 2026-08-16 12:00 |
18:00:33.60 |
-14:11:14.8 |
HIP 88160 |
3.41 |
| 2026-08-17 00:00 |
18:00:30.49 |
-14:12:56.2 |
HIP 88160 |
2.47 |
| 2026-08-17 12:00 |
18:00:27.66 |
-14:14:37.7 |
HIP 88160 |
2.76 |
| 2026-08-18 00:00 |
18:00:25.10 |
-14:16:19.4 |
HIP 88160 |
4.00 |
| 2026-08-18 12:00 |
18:00:22.82 |
-14:18:01.2 |
HIP 88160 |
5.57 |
| 2026-08-19 00:00 |
18:00:20.82 |
-14:19:43.2 |
HIP 88160 |
7.24 |