| Parameter |
Value |
| Designation |
392P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-01-10T10:13:16.317120Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:04Z |
| Obs used |
387 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
6.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-10-26T23:06:55.296000Z |
| Discovery magnitude (MPC) |
19.20 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-07-23.0000000 |
| e |
0.68253089 |
| q (au) |
1.954181 |
| a (au) |
6.155501 |
| i (deg) |
4.936928 |
| Ω (om, deg) |
25.107005 |
| ω (w, deg) |
71.998314 |
| M (ma, deg) |
59.604733 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.743 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.743 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.765 |
| k |
0.987 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
17:32:44.36 |
-27:45:25.1 |
HIP 85909 |
19.02 |
| 2026-09-20 12:00 |
17:32:47.68 |
-27:45:15.1 |
HIP 85909 |
18.57 |
| 2026-09-21 00:00 |
17:32:51.09 |
-27:45:05.2 |
HIP 85909 |
18.13 |
| 2026-09-21 12:00 |
17:32:54.62 |
-27:44:55.3 |
HIP 85909 |
17.71 |
| 2026-09-22 00:00 |
17:32:58.24 |
-27:44:45.5 |
HIP 85909 |
17.31 |
| 2026-09-22 12:00 |
17:33:01.98 |
-27:44:35.9 |
HIP 85909 |
16.93 |
| 2026-09-23 00:00 |
17:33:05.81 |
-27:44:26.3 |
HIP 85909 |
16.59 |
| 2026-09-23 12:00 |
17:33:09.75 |
-27:44:16.8 |
HIP 85909 |
16.28 |
| 2026-09-24 00:00 |
17:33:13.79 |
-27:44:07.4 |
HIP 85909 |
16.02 |
| 2026-09-24 12:00 |
17:33:17.94 |
-27:43:58.0 |
HIP 85909 |
15.80 |
| 2026-09-25 00:00 |
17:33:22.19 |
-27:43:48.8 |
HIP 85909 |
15.64 |
| 2026-09-25 12:00 |
17:33:26.54 |
-27:43:39.7 |
HIP 85909 |
15.54 |
| 2026-09-26 00:00 |
17:33:30.99 |
-27:43:30.6 |
HIP 85909 |
15.50 |
| 2026-09-26 12:00 |
17:33:35.54 |
-27:43:21.7 |
HIP 85909 |
15.54 |
| 2026-09-27 00:00 |
17:33:40.19 |
-27:43:12.8 |
HIP 85909 |
15.65 |
| 2026-09-27 12:00 |
17:33:44.95 |
-27:43:04.0 |
HIP 85909 |
15.83 |
| 2026-09-28 00:00 |
17:33:49.80 |
-27:42:55.3 |
HIP 85909 |
16.09 |
| 2026-09-28 12:00 |
17:33:54.75 |
-27:42:46.7 |
HIP 85909 |
16.44 |
| 2026-09-29 00:00 |
17:33:59.81 |
-27:42:38.2 |
HIP 85909 |
16.86 |
| 2026-09-29 12:00 |
17:34:04.96 |
-27:42:29.8 |
HIP 85909 |
17.36 |
| 2026-09-30 00:00 |
17:34:10.21 |
-27:42:21.4 |
HIP 85909 |
17.93 |
| 2026-09-30 12:00 |
17:34:15.56 |
-27:42:13.2 |
HIP 85909 |
18.58 |
| 2026-10-01 00:00 |
17:34:21.01 |
-27:42:05.0 |
HIP 85909 |
19.29 |
| 2026-10-01 12:00 |
17:34:26.55 |
-27:41:57.0 |
HIP 85909 |
20.07 |
| 2026-10-02 00:00 |
17:34:32.20 |
-27:41:49.0 |
HIP 85909 |
20.91 |
| 2026-10-02 12:00 |
17:34:37.94 |
-27:41:41.1 |
HIP 85909 |
21.81 |
| 2026-10-03 00:00 |
17:34:43.77 |
-27:41:33.3 |
HIP 86069 |
21.81 |
| 2026-10-03 12:00 |
17:34:49.71 |
-27:41:25.6 |
HIP 86069 |
21.16 |
| 2026-10-04 00:00 |
17:34:55.74 |
-27:41:18.0 |
HIP 86069 |
20.57 |
| 2026-10-04 12:00 |
17:35:01.86 |
-27:41:10.4 |
HIP 86069 |
20.05 |
| 2026-10-05 00:00 |
17:35:08.08 |
-27:41:03.0 |
HIP 86069 |
19.60 |
| 2026-10-05 12:00 |
17:35:14.40 |
-27:40:55.6 |
HIP 86069 |
19.24 |
| 2026-10-06 00:00 |
17:35:20.81 |
-27:40:48.4 |
HIP 86069 |
18.98 |
| 2026-10-06 12:00 |
17:35:27.31 |
-27:40:41.2 |
HIP 86069 |
18.83 |
| 2026-10-07 00:00 |
17:35:33.91 |
-27:40:34.1 |
HIP 86069 |
18.79 |
| 2026-10-07 12:00 |
17:35:40.60 |
-27:40:27.1 |
HIP 86069 |
18.87 |
| 2026-10-08 00:00 |
17:35:47.39 |
-27:40:20.1 |
HIP 86069 |
19.07 |
| 2026-10-08 12:00 |
17:35:54.27 |
-27:40:13.3 |
HIP 86069 |
19.40 |
| 2026-10-09 00:00 |
17:36:01.24 |
-27:40:06.5 |
HIP 86069 |
19.84 |
| 2026-10-09 12:00 |
17:36:08.30 |
-27:39:59.8 |
HIP 86069 |
20.41 |
| 2026-10-10 00:00 |
17:36:15.45 |
-27:39:53.2 |
HIP 86069 |
21.09 |
| 2026-10-10 12:00 |
17:36:22.69 |
-27:39:46.7 |
HIP 86069 |
21.88 |
| 2026-10-11 00:00 |
17:36:30.03 |
-27:39:40.3 |
HIP 86069 |
22.77 |