| Parameter |
Value |
| Designation |
376P/LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-08-15T01:24:58.645440Z |
| Orbit solution date (soln_date, UTC) |
2024-09-11T13:42:35Z |
| Obs used |
478 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
14.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-04-22T11:32:11.097600Z |
| Discovery magnitude (MPC) |
18.04 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-09-26.0000000 |
| e |
0.51484893 |
| q (au) |
2.841707 |
| a (au) |
5.857366 |
| i (deg) |
1.188860 |
| Ω (om, deg) |
315.159432 |
| ω (w, deg) |
285.484686 |
| M (ma, deg) |
129.871457 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.056 + 5.725\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.056 |
| n |
5.725 |
| gf |
0.999 |
| gb |
-0.879 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2018-01-16 |
2019-03-12 |
+7.8827 |
-3.835 |
| 2019-03-12 |
2021-09-04 |
-3.5096 |
+2.097 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
03:30:52.04 |
+20:04:53.4 |
HIP 16329 |
5.26 |
| 2026-05-12 12:00 |
03:31:07.44 |
+20:05:46.7 |
HIP 16329 |
8.72 |
| 2026-05-13 00:00 |
03:31:22.85 |
+20:06:40.1 |
HIP 16329 |
12.34 |
| 2026-05-13 12:00 |
03:31:38.26 |
+20:07:33.3 |
HIP 16505 |
11.86 |
| 2026-05-14 00:00 |
03:31:53.69 |
+20:08:26.6 |
HIP 16505 |
8.13 |
| 2026-05-14 12:00 |
03:32:09.12 |
+20:09:19.8 |
HIP 16505 |
4.40 |
| 2026-05-15 00:00 |
03:32:24.55 |
+20:10:12.9 |
HIP 16505 |
0.69 |
| 2026-05-15 12:00 |
03:32:39.99 |
+20:11:06.0 |
HIP 16505 |
3.06 |
| 2026-05-16 00:00 |
03:32:55.43 |
+20:11:59.0 |
HIP 16505 |
6.79 |
| 2026-05-16 12:00 |
03:33:10.88 |
+20:12:52.0 |
HIP 16505 |
10.52 |
| 2026-05-17 00:00 |
03:33:26.33 |
+20:13:44.9 |
HIP 16505 |
14.25 |
| 2026-05-17 12:00 |
03:33:41.78 |
+20:14:37.8 |
HIP 16662 |
12.86 |
| 2026-05-18 00:00 |
03:33:57.23 |
+20:15:30.6 |
HIP 16662 |
9.57 |
| 2026-05-18 12:00 |
03:34:12.69 |
+20:16:23.3 |
HIP 16662 |
6.74 |
| 2026-05-19 00:00 |
03:34:28.14 |
+20:17:16.0 |
HIP 16662 |
5.22 |
| 2026-05-19 12:00 |
03:34:43.60 |
+20:18:08.6 |
HIP 16662 |
6.07 |
| 2026-05-20 00:00 |
03:34:59.05 |
+20:19:01.1 |
HIP 16662 |
8.62 |
| 2026-05-20 12:00 |
03:35:14.50 |
+20:19:53.6 |
HIP 16662 |
11.81 |
| 2026-05-21 00:00 |
03:35:29.95 |
+20:20:46.0 |
HIP 16662 |
15.24 |
| 2026-05-21 12:00 |
03:35:45.39 |
+20:21:38.3 |
HIP 16662 |
18.78 |
| 2026-05-22 00:00 |
03:36:00.83 |
+20:22:30.5 |
HIP 16813 |
19.25 |
| 2026-05-22 12:00 |
03:36:16.27 |
+20:23:22.6 |
HIP 16813 |
19.40 |
| 2026-05-23 00:00 |
03:36:31.70 |
+20:24:14.7 |
HIP 16813 |
20.26 |
| 2026-05-23 12:00 |
03:36:47.13 |
+20:25:06.7 |
HIP 16950 |
21.32 |
| 2026-05-24 00:00 |
03:37:02.55 |
+20:25:58.6 |
HIP 16950 |
18.86 |
| 2026-05-24 12:00 |
03:37:17.96 |
+20:26:50.4 |
HIP 16950 |
16.87 |
| 2026-05-25 00:00 |
03:37:33.37 |
+20:27:42.1 |
HIP 16950 |
15.53 |
| 2026-05-25 12:00 |
03:37:48.77 |
+20:28:33.7 |
HIP 17009 |
14.99 |
| 2026-05-26 00:00 |
03:38:04.16 |
+20:29:25.2 |
HIP 17009 |
12.05 |
| 2026-05-26 12:00 |
03:38:19.54 |
+20:30:16.6 |
HIP 17009 |
9.65 |
| 2026-05-27 00:00 |
03:38:34.91 |
+20:31:08.0 |
HIP 17009 |
8.28 |
| 2026-05-27 12:00 |
03:38:50.28 |
+20:31:59.2 |
HIP 17009 |
8.44 |
| 2026-05-28 00:00 |
03:39:05.63 |
+20:32:50.3 |
HIP 17009 |
10.07 |
| 2026-05-28 12:00 |
03:39:20.97 |
+20:33:41.4 |
HIP 17009 |
12.60 |
| 2026-05-29 00:00 |
03:39:36.30 |
+20:34:32.3 |
HIP 17009 |
15.59 |
| 2026-05-29 12:00 |
03:39:51.62 |
+20:35:23.1 |
HIP 17009 |
18.83 |
| 2026-05-30 00:00 |
03:40:06.93 |
+20:36:13.8 |
HIP 17009 |
22.21 |
| 2026-05-30 12:00 |
03:40:22.22 |
+20:37:04.4 |
HIP 17009 |
25.67 |
| 2026-05-31 00:00 |
03:40:37.50 |
+20:37:54.9 |
HIP 17026 |
28.44 |
| 2026-05-31 12:00 |
03:40:52.76 |
+20:38:45.3 |
HIP 17026 |
30.92 |
| 2026-06-01 00:00 |
03:41:08.02 |
+20:39:35.6 |
HIP 17026 |
33.62 |
| 2026-06-01 12:00 |
03:41:23.25 |
+20:40:25.7 |
HIP 17325 |
35.08 |
| 2026-06-02 00:00 |
03:41:38.47 |
+20:41:15.8 |
HIP 17325 |
34.43 |