| Parameter |
Value |
| Designation |
C/2024 L5 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-10T09:34:28.917120Z |
| Orbit solution date (soln_date, UTC) |
2026-04-14T13:42:18Z |
| Obs used |
1218 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
15.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-06-14T22:40:01.257600Z |
| Discovery magnitude (MPC) |
17.68 o |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-04-26.0000000 |
| e |
1.03719810 |
| q (au) |
3.432407 |
| a (au) |
-92.273697 |
| i (deg) |
166.573102 |
| Ω (om, deg) |
139.176328 |
| ω (w, deg) |
290.514693 |
| M (ma, deg) |
0.051818 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.855 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.855 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.763 |
| k |
0.999 |
| δ90 |
9.999 |
| 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 |
08:39:42.95 |
+18:34:25.5 |
HIP 42487 |
1.25 |
| 2026-05-12 12:00 |
08:39:39.19 |
+18:35:19.3 |
HIP 42487 |
2.33 |
| 2026-05-13 00:00 |
08:39:35.63 |
+18:36:12.2 |
HIP 42487 |
3.49 |
| 2026-05-13 12:00 |
08:39:32.28 |
+18:37:04.1 |
HIP 42487 |
4.64 |
| 2026-05-14 00:00 |
08:39:29.11 |
+18:37:55.1 |
HIP 42487 |
5.77 |
| 2026-05-14 12:00 |
08:39:26.15 |
+18:38:45.2 |
HIP 42487 |
6.86 |
| 2026-05-15 00:00 |
08:39:23.38 |
+18:39:34.4 |
HIP 42487 |
7.90 |
| 2026-05-15 12:00 |
08:39:20.80 |
+18:40:22.7 |
HIP 42487 |
8.91 |
| 2026-05-16 00:00 |
08:39:18.41 |
+18:41:10.1 |
HIP 42487 |
9.89 |
| 2026-05-16 12:00 |
08:39:16.20 |
+18:41:56.6 |
HIP 42487 |
10.82 |
| 2026-05-17 00:00 |
08:39:14.19 |
+18:42:42.3 |
HIP 42487 |
11.72 |
| 2026-05-17 12:00 |
08:39:12.36 |
+18:43:27.1 |
HIP 42487 |
12.58 |
| 2026-05-18 00:00 |
08:39:10.72 |
+18:44:11.0 |
HIP 42487 |
13.40 |
| 2026-05-18 12:00 |
08:39:09.25 |
+18:44:54.1 |
HIP 42487 |
14.19 |
| 2026-05-19 00:00 |
08:39:07.97 |
+18:45:36.4 |
HIP 42487 |
14.94 |
| 2026-05-19 12:00 |
08:39:06.86 |
+18:46:17.9 |
HIP 42487 |
15.66 |
| 2026-05-20 00:00 |
08:39:05.93 |
+18:46:58.5 |
HIP 42487 |
16.35 |
| 2026-05-20 12:00 |
08:39:05.17 |
+18:47:38.3 |
HIP 42487 |
17.01 |
| 2026-05-21 00:00 |
08:39:04.59 |
+18:48:17.4 |
HIP 42487 |
17.64 |
| 2026-05-21 12:00 |
08:39:04.18 |
+18:48:55.6 |
HIP 42487 |
18.23 |
| 2026-05-22 00:00 |
08:39:03.93 |
+18:49:33.1 |
HIP 42487 |
18.80 |
| 2026-05-22 12:00 |
08:39:03.86 |
+18:50:09.8 |
HIP 42487 |
19.35 |
| 2026-05-23 00:00 |
08:39:03.94 |
+18:50:45.7 |
HIP 42487 |
19.87 |
| 2026-05-23 12:00 |
08:39:04.20 |
+18:51:20.9 |
HIP 42487 |
20.36 |
| 2026-05-24 00:00 |
08:39:04.61 |
+18:51:55.3 |
HIP 42487 |
20.83 |
| 2026-05-24 12:00 |
08:39:05.18 |
+18:52:29.0 |
HIP 42487 |
21.28 |
| 2026-05-25 00:00 |
08:39:05.91 |
+18:53:02.0 |
HIP 42487 |
21.71 |
| 2026-05-25 12:00 |
08:39:06.80 |
+18:53:34.2 |
HIP 42487 |
22.12 |
| 2026-05-26 00:00 |
08:39:07.84 |
+18:54:05.8 |
HIP 42487 |
22.51 |
| 2026-05-26 12:00 |
08:39:09.04 |
+18:54:36.6 |
HIP 42487 |
22.89 |
| 2026-05-27 00:00 |
08:39:10.39 |
+18:55:06.7 |
HIP 42487 |
23.25 |
| 2026-05-27 12:00 |
08:39:11.88 |
+18:55:36.2 |
HIP 42487 |
23.60 |
| 2026-05-28 00:00 |
08:39:13.53 |
+18:56:04.9 |
HIP 42487 |
23.94 |
| 2026-05-28 12:00 |
08:39:15.32 |
+18:56:33.0 |
HIP 42487 |
24.27 |
| 2026-05-29 00:00 |
08:39:17.26 |
+18:57:00.4 |
HIP 42487 |
24.60 |
| 2026-05-29 12:00 |
08:39:19.34 |
+18:57:27.2 |
HIP 42487 |
24.91 |
| 2026-05-30 00:00 |
08:39:21.57 |
+18:57:53.3 |
HIP 42487 |
25.23 |
| 2026-05-30 12:00 |
08:39:23.93 |
+18:58:18.7 |
HIP 42487 |
25.54 |
| 2026-05-31 00:00 |
08:39:26.44 |
+18:58:43.5 |
HIP 42542 |
25.58 |
| 2026-05-31 12:00 |
08:39:29.08 |
+18:59:07.7 |
HIP 42542 |
24.93 |
| 2026-06-01 00:00 |
08:39:31.85 |
+18:59:31.3 |
HIP 42542 |
24.27 |
| 2026-06-01 12:00 |
08:39:34.77 |
+18:59:54.2 |
HIP 42542 |
23.61 |
| 2026-06-02 00:00 |
08:39:37.81 |
+19:00:16.5 |
HIP 42542 |
22.96 |