| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
03:41:53.68 |
+20:42:05.7 |
HIP 17325 |
34.16 |
| 2026-06-03 00:00 |
03:42:08.86 |
+20:42:55.5 |
HIP 17325 |
34.27 |
| 2026-06-03 12:00 |
03:42:24.03 |
+20:43:45.2 |
HIP 17453 |
31.38 |
| 2026-06-04 00:00 |
03:42:39.19 |
+20:44:34.8 |
HIP 17453 |
27.80 |
| 2026-06-04 12:00 |
03:42:54.32 |
+20:45:24.2 |
HIP 17453 |
24.24 |
| 2026-06-05 00:00 |
03:43:09.43 |
+20:46:13.5 |
HIP 17453 |
20.71 |
| 2026-06-05 12:00 |
03:43:24.53 |
+20:47:02.7 |
HIP 17453 |
17.22 |
| 2026-06-06 00:00 |
03:43:39.61 |
+20:47:51.8 |
HIP 17453 |
13.81 |
| 2026-06-06 12:00 |
03:43:54.66 |
+20:48:40.7 |
HIP 17453 |
10.54 |
| 2026-06-07 00:00 |
03:44:09.70 |
+20:49:29.5 |
HIP 17453 |
7.58 |
| 2026-06-07 12:00 |
03:44:24.71 |
+20:50:18.2 |
HIP 17453 |
5.48 |
| 2026-06-08 00:00 |
03:44:39.70 |
+20:51:06.7 |
HIP 17453 |
5.34 |
| 2026-06-08 12:00 |
03:44:54.67 |
+20:51:55.1 |
HIP 17453 |
7.26 |
| 2026-06-09 00:00 |
03:45:09.61 |
+20:52:43.4 |
HIP 17481 |
9.74 |
| 2026-06-09 12:00 |
03:45:24.53 |
+20:53:31.5 |
HIP 17481 |
12.67 |
| 2026-06-10 00:00 |
03:45:39.42 |
+20:54:19.5 |
HIP 17607 |
9.45 |
| 2026-06-10 12:00 |
03:45:54.29 |
+20:55:07.3 |
HIP 17607 |
6.29 |
| 2026-06-11 00:00 |
03:46:09.14 |
+20:55:55.0 |
HIP 17607 |
3.93 |
| 2026-06-11 12:00 |
03:46:23.96 |
+20:56:42.6 |
HIP 17607 |
4.06 |
| 2026-06-12 00:00 |
03:46:38.75 |
+20:57:30.0 |
HIP 17607 |
6.54 |
| 2026-06-12 12:00 |
03:46:53.51 |
+20:58:17.3 |
HIP 17607 |
9.69 |
| 2026-06-13 00:00 |
03:47:08.24 |
+20:59:04.4 |
HIP 17607 |
13.03 |
| 2026-06-13 12:00 |
03:47:22.95 |
+20:59:51.3 |
HIP 17607 |
16.45 |
| 2026-06-14 00:00 |
03:47:37.62 |
+21:00:38.1 |
HIP 17803 |
14.54 |
| 2026-06-14 12:00 |
03:47:52.27 |
+21:01:24.8 |
HIP 17803 |
11.04 |
| 2026-06-15 00:00 |
03:48:06.88 |
+21:02:11.2 |
HIP 17803 |
7.55 |
| 2026-06-15 12:00 |
03:48:21.46 |
+21:02:57.6 |
HIP 17803 |
4.07 |
| 2026-06-16 00:00 |
03:48:36.01 |
+21:03:43.7 |
HIP 17803 |
0.72 |
| 2026-06-16 12:00 |
03:48:50.52 |
+21:04:29.7 |
HIP 17803 |
2.94 |
| 2026-06-17 00:00 |
03:49:05.01 |
+21:05:15.6 |
HIP 17803 |
6.38 |
| 2026-06-17 12:00 |
03:49:19.45 |
+21:06:01.3 |
HIP 17909 |
7.45 |
| 2026-06-18 00:00 |
03:49:33.86 |
+21:06:46.8 |
HIP 17909 |
4.24 |
| 2026-06-18 12:00 |
03:49:48.24 |
+21:07:32.1 |
HIP 17909 |
2.08 |
| 2026-06-19 00:00 |
03:50:02.58 |
+21:08:17.3 |
HIP 17909 |
3.77 |
| 2026-06-19 12:00 |
03:50:16.88 |
+21:09:02.3 |
HIP 17909 |
6.89 |
| 2026-06-20 00:00 |
03:50:31.15 |
+21:09:47.1 |
HIP 17909 |
10.19 |
| 2026-06-20 12:00 |
03:50:45.37 |
+21:10:31.8 |
HIP 17909 |
13.54 |
| 2026-06-21 00:00 |
03:50:59.56 |
+21:11:16.3 |
HIP 17909 |
16.89 |
| 2026-06-21 12:00 |
03:51:13.71 |
+21:12:00.6 |
HIP 17909 |
20.25 |
| 2026-06-22 00:00 |
03:51:27.82 |
+21:12:44.7 |
HIP 17909 |
23.61 |