C/2014 L5 (Lemmon)
| Parameter |
Value |
| Designation |
C/2014 L5 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-26T09:05:17.537280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:55Z |
| Obs used |
75 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
11.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-09-05.0000000 |
| e |
1.00264316 |
| q (au) |
6.203169 |
| a (au) |
-2346.877572 |
| i (deg) |
122.805134 |
| Ω (om, deg) |
35.683472 |
| ω (w, deg) |
45.611210 |
| M (ma, deg) |
-0.000714 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.237 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.237 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-02-03 00:00 |
15:14:00.08 |
-03:51:38.3 |
HIP 74555 |
3.74 |
| 2026-02-03 12:00 |
15:14:00.08 |
-03:51:29.3 |
HIP 74555 |
3.59 |
| 2026-02-04 00:00 |
15:14:00.03 |
-03:51:20.2 |
HIP 74555 |
3.43 |
| 2026-02-04 12:00 |
15:13:59.95 |
-03:51:10.8 |
HIP 74555 |
3.28 |
| 2026-02-05 00:00 |
15:13:59.82 |
-03:51:01.2 |
HIP 74555 |
3.12 |
| 2026-02-05 12:00 |
15:13:59.65 |
-03:50:51.5 |
HIP 74555 |
2.96 |
| 2026-02-06 00:00 |
15:13:59.43 |
-03:50:41.5 |
HIP 74555 |
2.80 |
| 2026-02-06 12:00 |
15:13:59.18 |
-03:50:31.4 |
HIP 74555 |
2.63 |
| 2026-02-07 00:00 |
15:13:58.88 |
-03:50:21.1 |
HIP 74555 |
2.47 |
| 2026-02-07 12:00 |
15:13:58.54 |
-03:50:10.6 |
HIP 74555 |
2.31 |
| 2026-02-08 00:00 |
15:13:58.15 |
-03:50:00.0 |
HIP 74555 |
2.15 |
| 2026-02-08 12:00 |
15:13:57.72 |
-03:49:49.1 |
HIP 74555 |
2.00 |
| 2026-02-09 00:00 |
15:13:57.25 |
-03:49:38.0 |
HIP 74555 |
1.87 |
| 2026-02-09 12:00 |
15:13:56.73 |
-03:49:26.8 |
HIP 74555 |
1.76 |
| 2026-02-10 00:00 |
15:13:56.17 |
-03:49:15.4 |
HIP 74555 |
1.67 |
| 2026-02-10 12:00 |
15:13:55.57 |
-03:49:03.8 |
HIP 74555 |
1.62 |
| 2026-02-11 00:00 |
15:13:54.92 |
-03:48:52.0 |
HIP 74555 |
1.61 |
| 2026-02-11 12:00 |
15:13:54.23 |
-03:48:40.1 |
HIP 74555 |
1.65 |
| 2026-02-12 00:00 |
15:13:53.50 |
-03:48:28.0 |
HIP 74555 |
1.73 |
| 2026-02-12 12:00 |
15:13:52.72 |
-03:48:15.7 |
HIP 74555 |
1.87 |
| 2026-02-13 00:00 |
15:13:51.90 |
-03:48:03.2 |
HIP 74555 |
2.04 |
| 2026-02-13 12:00 |
15:13:51.04 |
-03:47:50.6 |
HIP 74555 |
2.25 |
| 2026-02-14 00:00 |
15:13:50.13 |
-03:47:37.8 |
HIP 74555 |
2.50 |
| 2026-02-14 12:00 |
15:13:49.18 |
-03:47:24.8 |
HIP 74555 |
2.76 |
| 2026-02-15 00:00 |
15:13:48.18 |
-03:47:11.7 |
HIP 74555 |
3.05 |
| 2026-02-15 12:00 |
15:13:47.14 |
-03:46:58.4 |
HIP 74555 |
3.36 |
| 2026-02-16 00:00 |
15:13:46.06 |
-03:46:44.9 |
HIP 74555 |
3.68 |
| 2026-02-16 12:00 |
15:13:44.93 |
-03:46:31.3 |
HIP 74555 |
4.02 |
| 2026-02-17 00:00 |
15:13:43.76 |
-03:46:17.5 |
HIP 74555 |
4.38 |
| 2026-02-17 12:00 |
15:13:42.55 |
-03:46:03.6 |
HIP 74555 |
4.74 |
| 2026-02-18 00:00 |
15:13:41.29 |
-03:45:49.5 |
HIP 74555 |
5.12 |
| 2026-02-18 12:00 |
15:13:39.99 |
-03:45:35.3 |
HIP 74555 |
5.52 |
| 2026-02-19 00:00 |
15:13:38.65 |
-03:45:20.9 |
HIP 74555 |
5.92 |
| 2026-02-19 12:00 |
15:13:37.26 |
-03:45:06.3 |
HIP 74555 |
6.34 |
| 2026-02-20 00:00 |
15:13:35.83 |
-03:44:51.6 |
HIP 74555 |
6.77 |
| 2026-02-20 12:00 |
15:13:34.35 |
-03:44:36.7 |
HIP 74555 |
7.21 |
| 2026-02-21 00:00 |
15:13:32.83 |
-03:44:21.7 |
HIP 74555 |
7.66 |
| 2026-02-21 12:00 |
15:13:31.27 |
-03:44:06.6 |
HIP 74555 |
8.12 |
| 2026-02-22 00:00 |
15:13:29.66 |
-03:43:51.3 |
HIP 74464 |
7.67 |
| 2026-02-22 12:00 |
15:13:28.02 |
-03:43:35.9 |
HIP 74464 |
7.21 |
| 2026-02-23 00:00 |
15:13:26.33 |
-03:43:20.3 |
HIP 74464 |
6.73 |
| 2026-02-23 12:00 |
15:13:24.59 |
-03:43:04.6 |
HIP 74464 |
6.24 |
| 2026-02-24 00:00 |
15:13:22.81 |
-03:42:48.8 |
HIP 74464 |
5.75 |