| Parameter |
Value |
| Designation |
315P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-12-07T07:13:42.444480Z |
| Orbit solution date (soln_date, UTC) |
2025-11-25T15:42:35Z |
| Obs used |
2369 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
10.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-10-14.0000000 |
| e |
0.51637548 |
| q (au) |
2.429183 |
| a (au) |
5.022870 |
| i (deg) |
17.906607 |
| Ω (om, deg) |
69.600919 |
| ω (w, deg) |
66.946020 |
| M (ma, deg) |
227.329282 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.157 + 5.208\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.157 |
| n |
5.208 |
| gf |
0.987 |
| gb |
-0.977 |
| k |
1.000 |
| δ90 |
8.690 |
| 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) |
| 2026-07-29 00:00 |
03:08:16.49 |
+06:36:26.2 |
HIP 14590 |
7.27 |
| 2026-07-29 12:00 |
03:08:35.30 |
+06:37:27.9 |
HIP 14590 |
6.48 |
| 2026-07-30 00:00 |
03:08:53.97 |
+06:38:28.7 |
HIP 14590 |
8.75 |
| 2026-07-30 12:00 |
03:09:12.52 |
+06:39:28.8 |
HIP 14702 |
11.24 |
| 2026-07-31 00:00 |
03:09:30.93 |
+06:40:28.0 |
HIP 14702 |
6.57 |
| 2026-07-31 12:00 |
03:09:49.20 |
+06:41:26.4 |
HIP 14702 |
1.97 |
| 2026-08-01 00:00 |
03:10:07.34 |
+06:42:24.0 |
HIP 14702 |
2.74 |
| 2026-08-01 12:00 |
03:10:25.33 |
+06:43:20.7 |
HIP 14702 |
7.28 |
| 2026-08-02 00:00 |
03:10:43.19 |
+06:44:16.7 |
HIP 14802 |
10.14 |
| 2026-08-02 12:00 |
03:11:00.91 |
+06:45:11.8 |
HIP 14802 |
7.16 |
| 2026-08-03 00:00 |
03:11:18.48 |
+06:46:06.0 |
HIP 14802 |
6.32 |
| 2026-08-03 12:00 |
03:11:35.91 |
+06:46:59.5 |
HIP 14802 |
8.25 |
| 2026-08-04 00:00 |
03:11:53.19 |
+06:47:52.1 |
HIP 14802 |
11.60 |
| 2026-08-04 12:00 |
03:12:10.33 |
+06:48:43.9 |
HIP 14915 |
9.91 |
| 2026-08-05 00:00 |
03:12:27.32 |
+06:49:34.8 |
HIP 14915 |
9.93 |
| 2026-08-05 12:00 |
03:12:44.16 |
+06:50:24.9 |
HIP 14915 |
11.63 |
| 2026-08-06 00:00 |
03:13:00.84 |
+06:51:14.2 |
HIP 14915 |
14.40 |
| 2026-08-06 12:00 |
03:13:17.38 |
+06:52:02.6 |
HIP 14915 |
17.72 |
| 2026-08-07 00:00 |
03:13:33.76 |
+06:52:50.2 |
HIP 14915 |
21.30 |
| 2026-08-07 12:00 |
03:13:49.98 |
+06:53:37.0 |
HIP 14915 |
25.02 |
| 2026-08-08 00:00 |
03:14:06.04 |
+06:54:22.9 |
HIP 14915 |
28.80 |
| 2026-08-08 12:00 |
03:14:21.95 |
+06:55:08.0 |
HIP 15214 |
27.99 |
| 2026-08-09 00:00 |
03:14:37.70 |
+06:55:52.3 |
HIP 15214 |
24.08 |
| 2026-08-09 12:00 |
03:14:53.28 |
+06:56:35.7 |
HIP 15214 |
20.24 |
| 2026-08-10 00:00 |
03:15:08.70 |
+06:57:18.3 |
HIP 15214 |
16.48 |
| 2026-08-10 12:00 |
03:15:23.95 |
+06:58:00.0 |
HIP 15214 |
12.86 |
| 2026-08-11 00:00 |
03:15:39.04 |
+06:58:40.9 |
HIP 15214 |
9.44 |
| 2026-08-11 12:00 |
03:15:53.95 |
+06:59:21.0 |
HIP 15214 |
6.52 |
| 2026-08-12 00:00 |
03:16:08.70 |
+07:00:00.2 |
HIP 15214 |
4.92 |
| 2026-08-12 12:00 |
03:16:23.28 |
+07:00:38.6 |
HIP 15214 |
5.77 |
| 2026-08-13 00:00 |
03:16:37.68 |
+07:01:16.1 |
HIP 15214 |
8.30 |
| 2026-08-13 12:00 |
03:16:51.91 |
+07:01:52.8 |
HIP 15214 |
11.40 |
| 2026-08-14 00:00 |
03:17:05.96 |
+07:02:28.7 |
HIP 15279 |
14.50 |
| 2026-08-14 12:00 |
03:17:19.84 |
+07:03:03.8 |
HIP 15279 |
15.30 |
| 2026-08-15 00:00 |
03:17:33.53 |
+07:03:38.0 |
HIP 15279 |
16.78 |
| 2026-08-15 12:00 |
03:17:47.05 |
+07:04:11.4 |
HIP 15279 |
18.75 |
| 2026-08-16 00:00 |
03:18:00.38 |
+07:04:44.0 |
HIP 15433 |
18.18 |
| 2026-08-16 12:00 |
03:18:13.53 |
+07:05:15.7 |
HIP 15433 |
15.59 |
| 2026-08-17 00:00 |
03:18:26.50 |
+07:05:46.7 |
HIP 15433 |
13.35 |
| 2026-08-17 12:00 |
03:18:39.29 |
+07:06:16.8 |
HIP 15433 |
11.62 |
| 2026-08-18 00:00 |
03:18:51.88 |
+07:06:46.1 |
HIP 15433 |
10.63 |
| 2026-08-18 12:00 |
03:19:04.29 |
+07:07:14.6 |
HIP 15433 |
10.54 |
| 2026-08-19 00:00 |
03:19:16.51 |
+07:07:42.3 |
HIP 15433 |
11.32 |