| 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) |
| 2026-09-25 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 |
| 2026-10-11 12:00 |
22:11:21.12 |
-50:33:17.5 |
HIP 109564 |
17.98 |
| 2026-10-12 00:00 |
22:11:12.14 |
-50:32:10.5 |
HIP 109564 |
19.36 |
| 2026-10-12 12:00 |
22:11:03.31 |
-50:31:02.4 |
HIP 109331 |
20.67 |
| 2026-10-13 00:00 |
22:10:54.64 |
-50:29:53.2 |
HIP 109331 |
19.75 |
| 2026-10-13 12:00 |
22:10:46.11 |
-50:28:43.0 |
HIP 109331 |
18.99 |
| 2026-10-14 00:00 |
22:10:37.73 |
-50:27:31.8 |
HIP 109331 |
18.41 |
| 2026-10-14 12:00 |
22:10:29.51 |
-50:26:19.5 |
HIP 109331 |
18.00 |
| 2026-10-15 00:00 |
22:10:21.43 |
-50:25:06.1 |
HIP 109331 |
17.80 |
| 2026-10-15 12:00 |
22:10:13.52 |
-50:23:51.8 |
HIP 109331 |
17.80 |
| 2026-10-16 00:00 |
22:10:05.75 |
-50:22:36.5 |
HIP 109331 |
18.01 |