| 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
$$
M_a = (8.956 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.956 |
| n |
2.000 |
| gf |
0.835 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.727 |
| 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) |
| 2026-07-29 00:00 |
03:58:26.24 |
-04:41:19.2 |
HIP 18667 |
23.25 |
| 2026-07-29 12:00 |
03:58:29.10 |
-04:41:40.4 |
HIP 18667 |
22.77 |
| 2026-07-30 00:00 |
03:58:31.93 |
-04:42:01.9 |
HIP 18667 |
22.31 |
| 2026-07-30 12:00 |
03:58:34.72 |
-04:42:23.6 |
HIP 18667 |
21.88 |
| 2026-07-31 00:00 |
03:58:37.48 |
-04:42:45.5 |
HIP 18667 |
21.49 |
| 2026-07-31 12:00 |
03:58:40.20 |
-04:43:07.7 |
HIP 18667 |
21.12 |
| 2026-08-01 00:00 |
03:58:42.88 |
-04:43:30.1 |
HIP 18667 |
20.78 |
| 2026-08-01 12:00 |
03:58:45.53 |
-04:43:52.7 |
HIP 18667 |
20.48 |
| 2026-08-02 00:00 |
03:58:48.13 |
-04:44:15.5 |
HIP 18667 |
20.21 |
| 2026-08-02 12:00 |
03:58:50.70 |
-04:44:38.6 |
HIP 18667 |
19.98 |
| 2026-08-03 00:00 |
03:58:53.24 |
-04:45:01.8 |
HIP 18667 |
19.78 |
| 2026-08-03 12:00 |
03:58:55.73 |
-04:45:25.3 |
HIP 18667 |
19.61 |
| 2026-08-04 00:00 |
03:58:58.19 |
-04:45:49.0 |
HIP 18667 |
19.49 |
| 2026-08-04 12:00 |
03:59:00.61 |
-04:46:12.9 |
HIP 18667 |
19.39 |
| 2026-08-05 00:00 |
03:59:03.00 |
-04:46:37.0 |
HIP 18667 |
19.33 |
| 2026-08-05 12:00 |
03:59:05.34 |
-04:47:01.4 |
HIP 18667 |
19.31 |
| 2026-08-06 00:00 |
03:59:07.65 |
-04:47:25.9 |
HIP 18667 |
19.32 |
| 2026-08-06 12:00 |
03:59:09.91 |
-04:47:50.7 |
HIP 18667 |
19.36 |
| 2026-08-07 00:00 |
03:59:12.14 |
-04:48:15.6 |
HIP 18667 |
19.44 |
| 2026-08-07 12:00 |
03:59:14.33 |
-04:48:40.8 |
HIP 18667 |
19.55 |
| 2026-08-08 00:00 |
03:59:16.48 |
-04:49:06.2 |
HIP 18667 |
19.69 |
| 2026-08-08 12:00 |
03:59:18.59 |
-04:49:31.8 |
HIP 18667 |
19.86 |
| 2026-08-09 00:00 |
03:59:20.67 |
-04:49:57.6 |
HIP 18667 |
20.06 |
| 2026-08-09 12:00 |
03:59:22.70 |
-04:50:23.5 |
HIP 18667 |
20.28 |
| 2026-08-10 00:00 |
03:59:24.69 |
-04:50:49.7 |
HIP 18667 |
20.53 |
| 2026-08-10 12:00 |
03:59:26.65 |
-04:51:16.1 |
HIP 18667 |
20.81 |
| 2026-08-11 00:00 |
03:59:28.56 |
-04:51:42.7 |
HIP 18667 |
21.10 |
| 2026-08-11 12:00 |
03:59:30.43 |
-04:52:09.5 |
HIP 18667 |
21.42 |
| 2026-08-12 00:00 |
03:59:32.27 |
-04:52:36.4 |
HIP 18667 |
21.76 |
| 2026-08-12 12:00 |
03:59:34.06 |
-04:53:03.6 |
HIP 18667 |
22.11 |
| 2026-08-13 00:00 |
03:59:35.81 |
-04:53:30.9 |
HIP 18667 |
22.48 |
| 2026-08-13 12:00 |
03:59:37.52 |
-04:53:58.4 |
HIP 18667 |
22.87 |
| 2026-08-14 00:00 |
03:59:39.19 |
-04:54:26.1 |
HIP 18751 |
23.08 |
| 2026-08-14 12:00 |
03:59:40.82 |
-04:54:54.0 |
HIP 18751 |
22.97 |
| 2026-08-15 00:00 |
03:59:42.41 |
-04:55:22.0 |
HIP 18751 |
22.88 |
| 2026-08-15 12:00 |
03:59:43.96 |
-04:55:50.3 |
HIP 18751 |
22.82 |
| 2026-08-16 00:00 |
03:59:45.47 |
-04:56:18.7 |
HIP 18751 |
22.79 |
| 2026-08-16 12:00 |
03:59:46.93 |
-04:56:47.3 |
HIP 18751 |
22.78 |
| 2026-08-17 00:00 |
03:59:48.36 |
-04:57:16.0 |
HIP 18751 |
22.79 |
| 2026-08-17 12:00 |
03:59:49.74 |
-04:57:44.9 |
HIP 18751 |
22.84 |
| 2026-08-18 00:00 |
03:59:51.08 |
-04:58:14.0 |
HIP 18751 |
22.90 |
| 2026-08-18 12:00 |
03:59:52.38 |
-04:58:43.3 |
HIP 18751 |
23.00 |
| 2026-08-19 00:00 |
03:59:53.64 |
-04:59:12.7 |
HIP 18751 |
23.11 |