| Parameter |
Value |
| Designation |
C/2012 LP26 (Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-16T13:45:24.307200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:17Z |
| Obs used |
439 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
6.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-10-09.0000000 |
| e |
0.99927976 |
| q (au) |
6.536055 |
| a (au) |
9074.782001 |
| i (deg) |
25.379849 |
| Ω (om, deg) |
153.987248 |
| ω (w, deg) |
145.153210 |
| M (ma, deg) |
0.000061 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.895 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.895 |
| n |
2.000 |
| gf |
0.902 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.636 |
| 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) |
| 2026-05-12 00:00 |
03:45:59.98 |
-04:40:37.0 |
HIP 17731 |
28.46 |
| 2026-05-12 12:00 |
03:46:05.60 |
-04:40:16.2 |
HIP 17731 |
27.27 |
| 2026-05-13 00:00 |
03:46:11.22 |
-04:39:55.6 |
HIP 17731 |
26.10 |
| 2026-05-13 12:00 |
03:46:16.85 |
-04:39:35.3 |
HIP 17731 |
24.96 |
| 2026-05-14 00:00 |
03:46:22.48 |
-04:39:15.2 |
HIP 17731 |
23.85 |
| 2026-05-14 12:00 |
03:46:28.11 |
-04:38:55.4 |
HIP 17731 |
22.77 |
| 2026-05-15 00:00 |
03:46:33.75 |
-04:38:35.8 |
HIP 17731 |
21.74 |
| 2026-05-15 12:00 |
03:46:39.39 |
-04:38:16.5 |
HIP 17731 |
20.75 |
| 2026-05-16 00:00 |
03:46:45.03 |
-04:37:57.4 |
HIP 17731 |
19.81 |
| 2026-05-16 12:00 |
03:46:50.67 |
-04:37:38.6 |
HIP 17731 |
18.93 |
| 2026-05-17 00:00 |
03:46:56.32 |
-04:37:20.0 |
HIP 17731 |
18.12 |
| 2026-05-17 12:00 |
03:47:01.97 |
-04:37:01.7 |
HIP 17731 |
17.39 |
| 2026-05-18 00:00 |
03:47:07.61 |
-04:36:43.7 |
HIP 17731 |
16.75 |
| 2026-05-18 12:00 |
03:47:13.26 |
-04:36:25.9 |
HIP 17731 |
16.20 |
| 2026-05-19 00:00 |
03:47:18.91 |
-04:36:08.4 |
HIP 17731 |
15.77 |
| 2026-05-19 12:00 |
03:47:24.56 |
-04:35:51.1 |
HIP 17731 |
15.45 |
| 2026-05-20 00:00 |
03:47:30.21 |
-04:35:34.1 |
HIP 17789 |
14.95 |
| 2026-05-20 12:00 |
03:47:35.86 |
-04:35:17.4 |
HIP 17789 |
13.52 |
| 2026-05-21 00:00 |
03:47:41.50 |
-04:35:00.9 |
HIP 17789 |
12.09 |
| 2026-05-21 12:00 |
03:47:47.15 |
-04:34:44.7 |
HIP 17789 |
10.67 |
| 2026-05-22 00:00 |
03:47:52.79 |
-04:34:28.8 |
HIP 17789 |
9.24 |
| 2026-05-22 12:00 |
03:47:58.43 |
-04:34:13.1 |
HIP 17789 |
7.83 |
| 2026-05-23 00:00 |
03:48:04.07 |
-04:33:57.7 |
HIP 17789 |
6.42 |
| 2026-05-23 12:00 |
03:48:09.71 |
-04:33:42.5 |
HIP 17789 |
5.03 |
| 2026-05-24 00:00 |
03:48:15.34 |
-04:33:27.7 |
HIP 17789 |
3.66 |
| 2026-05-24 12:00 |
03:48:20.98 |
-04:33:13.1 |
HIP 17789 |
2.38 |
| 2026-05-25 00:00 |
03:48:26.60 |
-04:32:58.7 |
HIP 17789 |
1.40 |
| 2026-05-25 12:00 |
03:48:32.23 |
-04:32:44.6 |
HIP 17789 |
1.52 |
| 2026-05-26 00:00 |
03:48:37.85 |
-04:32:30.8 |
HIP 17789 |
2.59 |
| 2026-05-26 12:00 |
03:48:43.46 |
-04:32:17.3 |
HIP 17789 |
3.89 |
| 2026-05-27 00:00 |
03:48:49.07 |
-04:32:04.0 |
HIP 17789 |
5.25 |
| 2026-05-27 12:00 |
03:48:54.68 |
-04:31:51.0 |
HIP 17789 |
6.63 |
| 2026-05-28 00:00 |
03:49:00.28 |
-04:31:38.3 |
HIP 17789 |
8.02 |
| 2026-05-28 12:00 |
03:49:05.88 |
-04:31:25.9 |
HIP 17801 |
9.30 |
| 2026-05-29 00:00 |
03:49:11.47 |
-04:31:13.7 |
HIP 17801 |
10.27 |
| 2026-05-29 12:00 |
03:49:17.05 |
-04:31:01.8 |
HIP 17801 |
11.33 |
| 2026-05-30 00:00 |
03:49:22.63 |
-04:30:50.2 |
HIP 17801 |
12.46 |
| 2026-05-30 12:00 |
03:49:28.20 |
-04:30:38.8 |
HIP 17801 |
13.64 |
| 2026-05-31 00:00 |
03:49:33.77 |
-04:30:27.7 |
HIP 17801 |
14.86 |
| 2026-05-31 12:00 |
03:49:39.33 |
-04:30:16.9 |
HIP 17801 |
16.10 |
| 2026-06-01 00:00 |
03:49:44.88 |
-04:30:06.4 |
HIP 17987 |
15.86 |
| 2026-06-01 12:00 |
03:49:50.42 |
-04:29:56.1 |
HIP 17987 |
14.73 |
| 2026-06-02 00:00 |
03:49:55.96 |
-04:29:46.1 |
HIP 17987 |
13.64 |