| Parameter |
Value |
| Designation |
C/2023 V5 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-12-13T21:25:38.058240Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:53Z |
| Obs used |
148 |
| NEO |
- |
| M1 |
21.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-06T03:26:34.857600Z |
| Discovery magnitude (MPC) |
17.40 G |
| Discovery observatory (MPC) |
703 · University of Arizona Catalina Sky Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-11-07.0000000 |
| e |
1.00813865 |
| q (au) |
0.846019 |
| a (au) |
-103.950734 |
| i (deg) |
73.557595 |
| Ω (om, deg) |
31.524093 |
| ω (w, deg) |
56.987549 |
| M (ma, deg) |
-0.034309 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| 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) |
| 2026-06-01 00:00 |
13:31:21.95 |
-34:03:10.2 |
HIP 65922 |
6.52 |
| 2026-06-01 12:00 |
13:31:11.73 |
-34:01:51.8 |
HIP 65922 |
5.33 |
| 2026-06-02 00:00 |
13:31:01.63 |
-34:00:33.4 |
HIP 65922 |
5.18 |
| 2026-06-02 12:00 |
13:30:51.64 |
-33:59:15.1 |
HIP 65922 |
6.11 |
| 2026-06-03 00:00 |
13:30:41.76 |
-33:57:56.8 |
HIP 65922 |
7.73 |
| 2026-06-03 12:00 |
13:30:32.01 |
-33:56:38.6 |
HIP 65922 |
9.68 |
| 2026-06-04 00:00 |
13:30:22.37 |
-33:55:20.4 |
HIP 65922 |
11.79 |
| 2026-06-04 12:00 |
13:30:12.84 |
-33:54:02.2 |
HIP 65922 |
13.97 |
| 2026-06-05 00:00 |
13:30:03.43 |
-33:52:44.2 |
HIP 65922 |
16.19 |
| 2026-06-05 12:00 |
13:29:54.15 |
-33:51:26.2 |
HIP 65922 |
18.42 |
| 2026-06-06 00:00 |
13:29:44.97 |
-33:50:08.4 |
HIP 65701 |
20.27 |
| 2026-06-06 12:00 |
13:29:35.92 |
-33:48:50.6 |
HIP 65701 |
18.04 |
| 2026-06-07 00:00 |
13:29:26.99 |
-33:47:33.0 |
HIP 65701 |
15.85 |
| 2026-06-07 12:00 |
13:29:18.17 |
-33:46:15.4 |
HIP 65701 |
13.72 |
| 2026-06-08 00:00 |
13:29:09.48 |
-33:44:58.0 |
HIP 65701 |
11.64 |
| 2026-06-08 12:00 |
13:29:00.91 |
-33:43:40.8 |
HIP 65701 |
9.66 |
| 2026-06-09 00:00 |
13:28:52.45 |
-33:42:23.7 |
HIP 65701 |
7.81 |
| 2026-06-09 12:00 |
13:28:44.12 |
-33:41:06.8 |
HIP 65701 |
6.21 |
| 2026-06-10 00:00 |
13:28:35.90 |
-33:39:50.0 |
HIP 65701 |
5.05 |
| 2026-06-10 12:00 |
13:28:27.81 |
-33:38:33.5 |
HIP 65701 |
4.66 |
| 2026-06-11 00:00 |
13:28:19.84 |
-33:37:17.1 |
HIP 65701 |
5.19 |
| 2026-06-11 12:00 |
13:28:11.99 |
-33:36:00.9 |
HIP 65701 |
6.38 |
| 2026-06-12 00:00 |
13:28:04.27 |
-33:34:45.0 |
HIP 65701 |
7.94 |
| 2026-06-12 12:00 |
13:27:56.66 |
-33:33:29.2 |
HIP 65701 |
9.66 |
| 2026-06-13 00:00 |
13:27:49.18 |
-33:32:13.7 |
HIP 65701 |
11.47 |
| 2026-06-13 12:00 |
13:27:41.83 |
-33:30:58.4 |
HIP 65701 |
13.32 |
| 2026-06-14 00:00 |
13:27:34.59 |
-33:29:43.4 |
HIP 65688 |
14.60 |
| 2026-06-14 12:00 |
13:27:27.48 |
-33:28:28.7 |
HIP 65688 |
14.25 |
| 2026-06-15 00:00 |
13:27:20.49 |
-33:27:14.2 |
HIP 65688 |
14.14 |
| 2026-06-15 12:00 |
13:27:13.63 |
-33:26:00.0 |
HIP 65688 |
14.27 |
| 2026-06-16 00:00 |
13:27:06.89 |
-33:24:46.0 |
HIP 65688 |
14.63 |
| 2026-06-16 12:00 |
13:27:00.27 |
-33:23:32.4 |
HIP 65688 |
15.19 |
| 2026-06-17 00:00 |
13:26:53.78 |
-33:22:19.1 |
HIP 65688 |
15.93 |
| 2026-06-17 12:00 |
13:26:47.41 |
-33:21:06.0 |
HIP 65688 |
16.81 |
| 2026-06-18 00:00 |
13:26:41.17 |
-33:19:53.4 |
HIP 65688 |
17.80 |
| 2026-06-18 12:00 |
13:26:35.05 |
-33:18:41.0 |
HIP 65688 |
18.89 |
| 2026-06-19 00:00 |
13:26:29.06 |
-33:17:29.0 |
HIP 65688 |
20.05 |
| 2026-06-19 12:00 |
13:26:23.19 |
-33:16:17.3 |
HIP 65688 |
21.26 |
| 2026-06-20 00:00 |
13:26:17.44 |
-33:15:06.0 |
HIP 65450 |
21.84 |
| 2026-06-20 12:00 |
13:26:11.82 |
-33:13:55.0 |
HIP 65450 |
21.56 |
| 2026-06-21 00:00 |
13:26:06.32 |
-33:12:44.4 |
HIP 65450 |
21.42 |
| 2026-06-21 12:00 |
13:26:00.94 |
-33:11:34.2 |
HIP 65450 |
21.42 |
| 2026-06-22 00:00 |
13:25:55.69 |
-33:10:24.4 |
HIP 65450 |
21.55 |