| Parameter |
Value |
| Designation |
C/2024 M1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-20T00:40:14.862720Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:02Z |
| Obs used |
1565 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| 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) |
2024-12-03.0000000 |
| e |
0.94309352 |
| q (au) |
1.703373 |
| a (au) |
29.932839 |
| i (deg) |
73.710121 |
| Ω (om, deg) |
76.215098 |
| ω (w, deg) |
345.599965 |
| M (ma, deg) |
0.078071 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.266 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.266 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.732 |
| k |
0.971 |
| 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) |
| 2026-03-26 00:00 |
16:57:39.66 |
+60:11:33.9 |
HIP 82998 |
15.77 |
| 2026-03-26 12:00 |
16:57:22.02 |
+60:14:53.1 |
HIP 82998 |
12.61 |
| 2026-03-27 00:00 |
16:57:03.99 |
+60:18:10.9 |
HIP 82998 |
10.08 |
| 2026-03-27 12:00 |
16:56:45.55 |
+60:21:27.3 |
HIP 82998 |
8.76 |
| 2026-03-28 00:00 |
16:56:26.70 |
+60:24:42.3 |
HIP 82998 |
9.20 |
| 2026-03-28 12:00 |
16:56:07.46 |
+60:27:55.9 |
HIP 82998 |
11.20 |
| 2026-03-29 00:00 |
16:55:47.81 |
+60:31:08.0 |
HIP 82998 |
14.11 |
| 2026-03-29 12:00 |
16:55:27.76 |
+60:34:18.6 |
HIP 82677 |
16.43 |
| 2026-03-30 00:00 |
16:55:07.32 |
+60:37:27.6 |
HIP 82677 |
17.67 |
| 2026-03-30 12:00 |
16:54:46.47 |
+60:40:35.1 |
HIP 82677 |
19.63 |
| 2026-03-31 00:00 |
16:54:25.23 |
+60:43:41.0 |
HIP 82677 |
22.13 |
| 2026-03-31 12:00 |
16:54:03.60 |
+60:46:45.3 |
HIP 82677 |
25.02 |
| 2026-04-01 00:00 |
16:53:41.57 |
+60:49:47.9 |
HIP 82677 |
28.17 |
| 2026-04-01 12:00 |
16:53:19.15 |
+60:52:48.8 |
HIP 82677 |
31.51 |
| 2026-04-02 00:00 |
16:52:56.33 |
+60:55:48.0 |
HIP 82677 |
35.00 |
| 2026-04-02 12:00 |
16:52:33.13 |
+60:58:45.4 |
HIP 82677 |
38.58 |
| 2026-04-03 00:00 |
16:52:09.54 |
+61:01:41.1 |
HIP 82530 |
38.24 |
| 2026-04-03 12:00 |
16:51:45.56 |
+61:04:34.9 |
HIP 82530 |
35.47 |
| 2026-04-04 00:00 |
16:51:21.20 |
+61:07:27.0 |
HIP 82530 |
33.01 |
| 2026-04-04 12:00 |
16:50:56.45 |
+61:10:17.1 |
HIP 82530 |
30.94 |
| 2026-04-05 00:00 |
16:50:31.32 |
+61:13:05.4 |
HIP 82530 |
29.35 |
| 2026-04-05 12:00 |
16:50:05.81 |
+61:15:51.7 |
HIP 82530 |
28.32 |
| 2026-04-06 00:00 |
16:49:39.92 |
+61:18:36.0 |
HIP 82530 |
27.91 |
| 2026-04-06 12:00 |
16:49:13.66 |
+61:21:18.4 |
HIP 82530 |
28.16 |
| 2026-04-07 00:00 |
16:48:47.02 |
+61:23:58.8 |
HIP 82530 |
29.06 |
| 2026-04-07 12:00 |
16:48:20.02 |
+61:26:37.0 |
HIP 82530 |
30.54 |
| 2026-04-08 00:00 |
16:47:52.64 |
+61:29:13.2 |
HIP 82530 |
32.54 |
| 2026-04-08 12:00 |
16:47:24.90 |
+61:31:47.3 |
HIP 82530 |
34.96 |
| 2026-04-09 00:00 |
16:46:56.80 |
+61:34:19.3 |
HIP 82530 |
37.74 |
| 2026-04-09 12:00 |
16:46:28.33 |
+61:36:49.1 |
HIP 82530 |
40.80 |
| 2026-04-10 00:00 |
16:45:59.50 |
+61:39:16.6 |
HIP 81940 |
42.82 |
| 2026-04-10 12:00 |
16:45:30.32 |
+61:41:42.0 |
HIP 81940 |
44.33 |
| 2026-04-11 00:00 |
16:45:00.79 |
+61:44:05.0 |
HIP 81679 |
44.04 |
| 2026-04-11 12:00 |
16:44:30.91 |
+61:46:25.8 |
HIP 81679 |
40.03 |
| 2026-04-12 00:00 |
16:44:00.69 |
+61:48:44.3 |
HIP 81679 |
36.08 |
| 2026-04-12 12:00 |
16:43:30.12 |
+61:51:00.4 |
HIP 81679 |
32.22 |
| 2026-04-13 00:00 |
16:42:59.21 |
+61:53:14.1 |
HIP 81679 |
28.49 |
| 2026-04-13 12:00 |
16:42:27.96 |
+61:55:25.4 |
HIP 81679 |
24.96 |
| 2026-04-14 00:00 |
16:41:56.39 |
+61:57:34.2 |
HIP 81679 |
21.71 |
| 2026-04-14 12:00 |
16:41:24.49 |
+61:59:40.6 |
HIP 81679 |
18.92 |
| 2026-04-15 00:00 |
16:40:52.26 |
+62:01:44.5 |
HIP 81679 |
16.82 |
| 2026-04-15 12:00 |
16:40:19.72 |
+62:03:45.8 |
HIP 81679 |
15.69 |
| 2026-04-16 00:00 |
16:39:46.86 |
+62:05:44.6 |
HIP 81679 |
15.75 |