C/2024 M1 (ATLAS)
| Parameter |
Value |
| Designation |
C/2024 M1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-20T00:40:37.836480Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T13:39:26Z |
| Obs used |
1557 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-29T10:08:51.388800Z |
| Discovery magnitude (MPC) |
17.86 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-30.0000000 |
| e |
0.94309078 |
| q (au) |
1.703373 |
| a (au) |
29.931406 |
| i (deg) |
73.710130 |
| Ω (om, deg) |
76.215097 |
| ω (w, deg) |
345.600135 |
| M (ma, deg) |
0.060019 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.278 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.278 |
| n |
2.000 |
| gf |
0.801 |
| gb |
-0.728 |
| k |
0.969 |
| δ90 |
1.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
16:54:20.79 |
+54:06:09.1 |
HIP 82795 |
21.15 |
| 2026-02-03 12:00 |
16:54:39.48 |
+54:09:14.9 |
HIP 82795 |
17.34 |
| 2026-02-04 00:00 |
16:54:57.90 |
+54:12:22.1 |
HIP 82795 |
13.69 |
| 2026-02-04 12:00 |
16:55:16.05 |
+54:15:30.5 |
HIP 82795 |
10.38 |
| 2026-02-05 00:00 |
16:55:33.91 |
+54:18:40.2 |
HIP 82795 |
7.82 |
| 2026-02-05 12:00 |
16:55:51.50 |
+54:21:51.1 |
HIP 82795 |
6.89 |
| 2026-02-06 00:00 |
16:56:08.81 |
+54:25:03.2 |
HIP 82795 |
8.15 |
| 2026-02-06 12:00 |
16:56:25.84 |
+54:28:16.6 |
HIP 82795 |
10.85 |
| 2026-02-07 00:00 |
16:56:42.58 |
+54:31:31.1 |
HIP 82795 |
14.17 |
| 2026-02-07 12:00 |
16:56:59.03 |
+54:34:46.8 |
HIP 82795 |
17.77 |
| 2026-02-08 00:00 |
16:57:15.20 |
+54:38:03.6 |
HIP 83102 |
15.37 |
| 2026-02-08 12:00 |
16:57:31.08 |
+54:41:21.6 |
HIP 83102 |
12.22 |
| 2026-02-09 00:00 |
16:57:46.66 |
+54:44:40.7 |
HIP 83102 |
9.78 |
| 2026-02-09 12:00 |
16:58:01.95 |
+54:48:01.0 |
HIP 83102 |
8.67 |
| 2026-02-10 00:00 |
16:58:16.95 |
+54:51:22.2 |
HIP 83102 |
9.35 |
| 2026-02-10 12:00 |
16:58:31.65 |
+54:54:44.6 |
HIP 83102 |
11.50 |
| 2026-02-11 00:00 |
16:58:46.05 |
+54:58:08.0 |
HIP 83102 |
14.47 |
| 2026-02-11 12:00 |
16:59:00.15 |
+55:01:32.5 |
HIP 83102 |
17.85 |
| 2026-02-12 00:00 |
16:59:13.94 |
+55:04:57.9 |
HIP 83102 |
21.45 |
| 2026-02-12 12:00 |
16:59:27.43 |
+55:08:24.3 |
HIP 83102 |
25.16 |
| 2026-02-13 00:00 |
16:59:40.62 |
+55:11:51.7 |
HIP 83237 |
22.23 |
| 2026-02-13 12:00 |
16:59:53.49 |
+55:15:20.1 |
HIP 83237 |
18.33 |
| 2026-02-14 00:00 |
17:00:06.06 |
+55:18:49.4 |
HIP 83237 |
14.44 |
| 2026-02-14 12:00 |
17:00:18.31 |
+55:22:19.6 |
HIP 83237 |
10.58 |
| 2026-02-15 00:00 |
17:00:30.24 |
+55:25:50.6 |
HIP 83237 |
6.76 |
| 2026-02-15 12:00 |
17:00:41.86 |
+55:29:22.6 |
HIP 83237 |
3.14 |
| 2026-02-16 00:00 |
17:00:53.16 |
+55:32:55.3 |
HIP 83237 |
2.05 |
| 2026-02-16 12:00 |
17:01:04.15 |
+55:36:28.9 |
HIP 83237 |
5.34 |
| 2026-02-17 00:00 |
17:01:14.80 |
+55:40:03.3 |
HIP 83237 |
9.10 |
| 2026-02-17 12:00 |
17:01:25.14 |
+55:43:38.5 |
HIP 83237 |
12.91 |
| 2026-02-18 00:00 |
17:01:35.15 |
+55:47:14.4 |
HIP 83237 |
16.74 |
| 2026-02-18 12:00 |
17:01:44.83 |
+55:50:51.1 |
HIP 83476 |
19.32 |
| 2026-02-19 00:00 |
17:01:54.18 |
+55:54:28.4 |
HIP 83476 |
16.28 |
| 2026-02-19 12:00 |
17:02:03.20 |
+55:58:06.4 |
HIP 83476 |
13.71 |
| 2026-02-20 00:00 |
17:02:11.88 |
+56:01:45.1 |
HIP 83476 |
11.90 |
| 2026-02-20 12:00 |
17:02:20.23 |
+56:05:24.4 |
HIP 83476 |
11.22 |
| 2026-02-21 00:00 |
17:02:28.25 |
+56:09:04.3 |
HIP 83476 |
11.86 |
| 2026-02-21 12:00 |
17:02:35.92 |
+56:12:44.8 |
HIP 83476 |
13.64 |
| 2026-02-22 00:00 |
17:02:43.26 |
+56:16:25.9 |
HIP 83476 |
16.17 |
| 2026-02-22 12:00 |
17:02:50.25 |
+56:20:07.4 |
HIP 83476 |
19.17 |
| 2026-02-23 00:00 |
17:02:56.90 |
+56:23:49.5 |
HIP 83589 |
19.44 |
| 2026-02-23 12:00 |
17:03:03.21 |
+56:27:32.1 |
HIP 83589 |
17.30 |
| 2026-02-24 00:00 |
17:03:09.17 |
+56:31:15.1 |
HIP 83589 |
15.84 |