| Parameter |
Value |
| Designation |
P/2019 LM4 (Palomar) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-06-18T05:44:43.520640Z |
| Orbit solution date (soln_date, UTC) |
2024-12-26T20:12:37Z |
| Obs used |
248 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-04-23.0000000 |
| e |
0.58520723 |
| q (au) |
2.371614 |
| a (au) |
5.717588 |
| i (deg) |
36.394763 |
| Ω (om, deg) |
72.858371 |
| ω (w, deg) |
68.371061 |
| M (ma, deg) |
22.331143 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.257 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.257 |
| n |
6.000 |
| gf |
0.933 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
5.833 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
22:19:51.36 |
-51:02:33.1 |
HIP 110288 |
6.34 |
| 2026-09-20 12:00 |
22:19:37.14 |
-51:02:19.3 |
HIP 110288 |
8.32 |
| 2026-09-21 00:00 |
22:19:23.02 |
-51:02:04.1 |
HIP 110288 |
10.40 |
| 2026-09-21 12:00 |
22:19:08.99 |
-51:01:47.5 |
HIP 110288 |
12.53 |
| 2026-09-22 00:00 |
22:18:55.06 |
-51:01:29.5 |
HIP 110288 |
14.68 |
| 2026-09-22 12:00 |
22:18:41.22 |
-51:01:10.3 |
HIP 110288 |
16.84 |
| 2026-09-23 00:00 |
22:18:27.48 |
-51:00:49.6 |
HIP 110288 |
19.00 |
| 2026-09-23 12:00 |
22:18:13.83 |
-51:00:27.7 |
HIP 110288 |
21.16 |
| 2026-09-24 00:00 |
22:18:00.29 |
-51:00:04.4 |
HIP 110288 |
23.31 |
| 2026-09-24 12:00 |
22:17:46.85 |
-50:59:39.8 |
HIP 109940 |
24.97 |
| 2026-09-25 00:00 |
22:17:33.52 |
-50:59:13.8 |
HIP 109940 |
23.97 |
| 2026-09-25 12:00 |
22:17:20.29 |
-50:58:46.6 |
HIP 109940 |
23.14 |
| 2026-09-26 00:00 |
22:17:07.17 |
-50:58:18.0 |
HIP 109940 |
22.52 |
| 2026-09-26 12:00 |
22:16:54.15 |
-50:57:48.1 |
HIP 109940 |
22.10 |
| 2026-09-27 00:00 |
22:16:41.25 |
-50:57:17.0 |
HIP 109940 |
21.91 |
| 2026-09-27 12:00 |
22:16:28.46 |
-50:56:44.5 |
HIP 109940 |
21.94 |
| 2026-09-28 00:00 |
22:16:15.78 |
-50:56:10.8 |
HIP 109940 |
22.19 |
| 2026-09-28 12:00 |
22:16:03.22 |
-50:55:35.8 |
HIP 109940 |
22.64 |
| 2026-09-29 00:00 |
22:15:50.77 |
-50:54:59.5 |
HIP 109940 |
23.29 |
| 2026-09-29 12:00 |
22:15:38.43 |
-50:54:22.0 |
HIP 109940 |
24.12 |
| 2026-09-30 00:00 |
22:15:26.22 |
-50:53:43.1 |
HIP 109940 |
25.10 |
| 2026-09-30 12:00 |
22:15:14.13 |
-50:53:03.1 |
HIP 109940 |
26.21 |
| 2026-10-01 00:00 |
22:15:02.16 |
-50:52:21.8 |
HIP 109940 |
27.44 |
| 2026-10-01 12:00 |
22:14:50.31 |
-50:51:39.2 |
HIP 109940 |
28.77 |
| 2026-10-02 00:00 |
22:14:38.58 |
-50:50:55.4 |
HIP 109564 |
28.21 |
| 2026-10-02 12:00 |
22:14:26.98 |
-50:50:10.4 |
HIP 109564 |
26.40 |
| 2026-10-03 00:00 |
22:14:15.51 |
-50:49:24.1 |
HIP 109564 |
24.63 |
| 2026-10-03 12:00 |
22:14:04.17 |
-50:48:36.7 |
HIP 109564 |
22.92 |
| 2026-10-04 00:00 |
22:13:52.95 |
-50:47:48.0 |
HIP 109564 |
21.27 |
| 2026-10-04 12:00 |
22:13:41.87 |
-50:46:58.1 |
HIP 109564 |
19.70 |
| 2026-10-05 00:00 |
22:13:30.91 |
-50:46:07.0 |
HIP 109564 |
18.22 |
| 2026-10-05 12:00 |
22:13:20.09 |
-50:45:14.8 |
HIP 109564 |
16.86 |
| 2026-10-06 00:00 |
22:13:09.41 |
-50:44:21.3 |
HIP 109564 |
15.65 |
| 2026-10-06 12:00 |
22:12:58.86 |
-50:43:26.7 |
HIP 109564 |
14.61 |
| 2026-10-07 00:00 |
22:12:48.45 |
-50:42:30.9 |
HIP 109564 |
13.79 |
| 2026-10-07 12:00 |
22:12:38.18 |
-50:41:33.9 |
HIP 109564 |
13.22 |
| 2026-10-08 00:00 |
22:12:28.05 |
-50:40:35.8 |
HIP 109564 |
12.92 |
| 2026-10-08 12:00 |
22:12:18.05 |
-50:39:36.6 |
HIP 109564 |
12.92 |
| 2026-10-09 00:00 |
22:12:08.20 |
-50:38:36.2 |
HIP 109564 |
13.21 |
| 2026-10-09 12:00 |
22:11:58.50 |
-50:37:34.7 |
HIP 109564 |
13.77 |
| 2026-10-10 00:00 |
22:11:48.93 |
-50:36:32.1 |
HIP 109564 |
14.57 |
| 2026-10-10 12:00 |
22:11:39.52 |
-50:35:28.3 |
HIP 109564 |
15.56 |
| 2026-10-11 00:00 |
22:11:30.24 |
-50:34:23.5 |
HIP 109564 |
16.71 |