| 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) |
| 2026-03-26 00:00 |
03:38:12.48 |
-05:28:20.6 |
HIP 17027 |
15.20 |
| 2026-03-26 12:00 |
03:38:16.41 |
-05:27:43.1 |
HIP 17027 |
14.84 |
| 2026-03-27 00:00 |
03:38:20.36 |
-05:27:05.8 |
HIP 17027 |
14.56 |
| 2026-03-27 12:00 |
03:38:24.34 |
-05:26:28.5 |
HIP 17027 |
14.36 |
| 2026-03-28 00:00 |
03:38:28.36 |
-05:25:51.3 |
HIP 17027 |
14.25 |
| 2026-03-28 12:00 |
03:38:32.40 |
-05:25:14.2 |
HIP 17027 |
14.23 |
| 2026-03-29 00:00 |
03:38:36.48 |
-05:24:37.2 |
HIP 17027 |
14.30 |
| 2026-03-29 12:00 |
03:38:40.58 |
-05:24:00.3 |
HIP 17027 |
14.47 |
| 2026-03-30 00:00 |
03:38:44.71 |
-05:23:23.6 |
HIP 17027 |
14.73 |
| 2026-03-30 12:00 |
03:38:48.88 |
-05:22:46.9 |
HIP 17027 |
15.07 |
| 2026-03-31 00:00 |
03:38:53.07 |
-05:22:10.3 |
HIP 17027 |
15.50 |
| 2026-03-31 12:00 |
03:38:57.29 |
-05:21:33.9 |
HIP 17027 |
16.01 |
| 2026-04-01 00:00 |
03:39:01.54 |
-05:20:57.5 |
HIP 17027 |
16.58 |
| 2026-04-01 12:00 |
03:39:05.81 |
-05:20:21.3 |
HIP 17027 |
17.23 |
| 2026-04-02 00:00 |
03:39:10.11 |
-05:19:45.2 |
HIP 17027 |
17.93 |
| 2026-04-02 12:00 |
03:39:14.45 |
-05:19:09.2 |
HIP 17027 |
18.69 |
| 2026-04-03 00:00 |
03:39:18.80 |
-05:18:33.3 |
HIP 17027 |
19.49 |
| 2026-04-03 12:00 |
03:39:23.19 |
-05:17:57.6 |
HIP 17167 |
19.45 |
| 2026-04-04 00:00 |
03:39:27.60 |
-05:17:21.9 |
HIP 17167 |
18.23 |
| 2026-04-04 12:00 |
03:39:32.04 |
-05:16:46.4 |
HIP 17167 |
17.01 |
| 2026-04-05 00:00 |
03:39:36.50 |
-05:16:11.1 |
HIP 17167 |
15.79 |
| 2026-04-05 12:00 |
03:39:40.99 |
-05:15:35.8 |
HIP 17167 |
14.58 |
| 2026-04-06 00:00 |
03:39:45.51 |
-05:15:00.7 |
HIP 17167 |
13.36 |
| 2026-04-06 12:00 |
03:39:50.05 |
-05:14:25.7 |
HIP 17167 |
12.15 |
| 2026-04-07 00:00 |
03:39:54.62 |
-05:13:50.9 |
HIP 17167 |
10.95 |
| 2026-04-07 12:00 |
03:39:59.21 |
-05:13:16.1 |
HIP 17167 |
9.76 |
| 2026-04-08 00:00 |
03:40:03.83 |
-05:12:41.6 |
HIP 17167 |
8.59 |
| 2026-04-08 12:00 |
03:40:08.47 |
-05:12:07.1 |
HIP 17167 |
7.45 |
| 2026-04-09 00:00 |
03:40:13.14 |
-05:11:32.8 |
HIP 17167 |
6.37 |
| 2026-04-09 12:00 |
03:40:17.83 |
-05:10:58.7 |
HIP 17167 |
5.37 |
| 2026-04-10 00:00 |
03:40:22.54 |
-05:10:24.7 |
HIP 17167 |
4.52 |
| 2026-04-10 12:00 |
03:40:27.28 |
-05:09:50.9 |
HIP 17167 |
3.92 |
| 2026-04-11 00:00 |
03:40:32.04 |
-05:09:17.2 |
HIP 17167 |
3.70 |
| 2026-04-11 12:00 |
03:40:36.82 |
-05:08:43.6 |
HIP 17167 |
3.93 |
| 2026-04-12 00:00 |
03:40:41.63 |
-05:08:10.2 |
HIP 17167 |
4.55 |
| 2026-04-12 12:00 |
03:40:46.45 |
-05:07:37.0 |
HIP 17167 |
5.42 |
| 2026-04-13 00:00 |
03:40:51.30 |
-05:07:03.9 |
HIP 17167 |
6.44 |
| 2026-04-13 12:00 |
03:40:56.18 |
-05:06:31.0 |
HIP 17167 |
7.57 |
| 2026-04-14 00:00 |
03:41:01.07 |
-05:05:58.3 |
HIP 17167 |
8.75 |
| 2026-04-14 12:00 |
03:41:05.98 |
-05:05:25.7 |
HIP 17167 |
9.97 |
| 2026-04-15 00:00 |
03:41:10.92 |
-05:04:53.3 |
HIP 17167 |
11.22 |
| 2026-04-15 12:00 |
03:41:15.88 |
-05:04:21.0 |
HIP 17167 |
12.50 |
| 2026-04-16 00:00 |
03:41:20.85 |
-05:03:48.9 |
HIP 17205 |
13.75 |