| Parameter |
Value |
| Designation |
292P/Li |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-02-06T08:53:58.968960Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:14:15Z |
| Obs used |
498 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
13.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-05-04.0000000 |
| e |
0.58678712 |
| q (au) |
2.535007 |
| a (au) |
6.134869 |
| i (deg) |
24.316162 |
| Ω (om, deg) |
91.860435 |
| ω (w, deg) |
318.847932 |
| M (ma, deg) |
247.179418 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.075 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.075 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.506 |
| 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 |
| 2013-05-09 |
2014-02-01 |
+14.5124 |
-5.970 |
| 2014-02-06 |
2018-04-23 |
-1.1227 |
+0.220 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
18:54:06.20 |
-24:17:37.6 |
HIP 92709 |
20.28 |
| 2026-03-26 12:00 |
18:54:14.41 |
-24:18:03.5 |
HIP 92709 |
21.56 |
| 2026-03-27 00:00 |
18:54:22.49 |
-24:18:29.7 |
HIP 92709 |
22.91 |
| 2026-03-27 12:00 |
18:54:30.44 |
-24:18:56.1 |
HIP 92709 |
24.32 |
| 2026-03-28 00:00 |
18:54:38.24 |
-24:19:22.8 |
HIP 92709 |
25.77 |
| 2026-03-28 12:00 |
18:54:45.91 |
-24:19:49.7 |
HIP 92780 |
26.83 |
| 2026-03-29 00:00 |
18:54:53.45 |
-24:20:17.0 |
HIP 92780 |
26.78 |
| 2026-03-29 12:00 |
18:55:00.85 |
-24:20:44.5 |
HIP 92780 |
26.83 |
| 2026-03-30 00:00 |
18:55:08.11 |
-24:21:12.2 |
HIP 92994 |
26.92 |
| 2026-03-30 12:00 |
18:55:15.23 |
-24:21:40.3 |
HIP 92994 |
25.35 |
| 2026-03-31 00:00 |
18:55:22.21 |
-24:22:08.6 |
HIP 92994 |
23.81 |
| 2026-03-31 12:00 |
18:55:29.05 |
-24:22:37.1 |
HIP 92994 |
22.31 |
| 2026-04-01 00:00 |
18:55:35.75 |
-24:23:06.0 |
HIP 92994 |
20.85 |
| 2026-04-01 12:00 |
18:55:42.32 |
-24:23:35.1 |
HIP 92994 |
19.44 |
| 2026-04-02 00:00 |
18:55:48.74 |
-24:24:04.6 |
HIP 92994 |
18.07 |
| 2026-04-02 12:00 |
18:55:55.01 |
-24:24:34.3 |
HIP 92994 |
16.74 |
| 2026-04-03 00:00 |
18:56:01.15 |
-24:25:04.2 |
HIP 92994 |
15.47 |
| 2026-04-03 12:00 |
18:56:07.14 |
-24:25:34.5 |
HIP 92994 |
14.25 |
| 2026-04-04 00:00 |
18:56:12.99 |
-24:26:05.1 |
HIP 92994 |
13.09 |
| 2026-04-04 12:00 |
18:56:18.69 |
-24:26:35.9 |
HIP 92994 |
12.01 |
| 2026-04-05 00:00 |
18:56:24.25 |
-24:27:07.1 |
HIP 92994 |
11.00 |
| 2026-04-05 12:00 |
18:56:29.66 |
-24:27:38.5 |
HIP 92994 |
10.08 |
| 2026-04-06 00:00 |
18:56:34.93 |
-24:28:10.2 |
HIP 92994 |
9.26 |
| 2026-04-06 12:00 |
18:56:40.05 |
-24:28:42.3 |
HIP 92994 |
8.57 |
| 2026-04-07 00:00 |
18:56:45.02 |
-24:29:14.6 |
HIP 92994 |
8.01 |
| 2026-04-07 12:00 |
18:56:49.84 |
-24:29:47.2 |
HIP 92994 |
7.61 |
| 2026-04-08 00:00 |
18:56:54.51 |
-24:30:20.2 |
HIP 92994 |
7.38 |
| 2026-04-08 12:00 |
18:56:59.04 |
-24:30:53.4 |
HIP 92994 |
7.31 |
| 2026-04-09 00:00 |
18:57:03.41 |
-24:31:26.9 |
HIP 92994 |
7.40 |
| 2026-04-09 12:00 |
18:57:07.63 |
-24:32:00.8 |
HIP 92994 |
7.64 |
| 2026-04-10 00:00 |
18:57:11.71 |
-24:32:34.9 |
HIP 92994 |
7.99 |
| 2026-04-10 12:00 |
18:57:15.63 |
-24:33:09.4 |
HIP 92994 |
8.44 |
| 2026-04-11 00:00 |
18:57:19.39 |
-24:33:44.2 |
HIP 92994 |
8.96 |
| 2026-04-11 12:00 |
18:57:23.00 |
-24:34:19.2 |
HIP 92994 |
9.52 |
| 2026-04-12 00:00 |
18:57:26.46 |
-24:34:54.6 |
HIP 92994 |
10.12 |
| 2026-04-12 12:00 |
18:57:29.77 |
-24:35:30.3 |
HIP 92994 |
10.74 |
| 2026-04-13 00:00 |
18:57:32.92 |
-24:36:06.4 |
HIP 92994 |
11.37 |
| 2026-04-13 12:00 |
18:57:35.91 |
-24:36:42.7 |
HIP 92994 |
12.01 |
| 2026-04-14 00:00 |
18:57:38.75 |
-24:37:19.4 |
HIP 92994 |
12.64 |
| 2026-04-14 12:00 |
18:57:41.43 |
-24:37:56.3 |
HIP 92994 |
13.27 |
| 2026-04-15 00:00 |
18:57:43.96 |
-24:38:33.6 |
HIP 92994 |
13.89 |
| 2026-04-15 12:00 |
18:57:46.32 |
-24:39:11.3 |
HIP 92994 |
14.49 |
| 2026-04-16 00:00 |
18:57:48.53 |
-24:39:49.2 |
HIP 93132 |
14.71 |