C/2024 G2 (ATLAS)
| Parameter |
Value |
| Designation |
C/2024 G2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-06-13T12:05:56.823360Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:18Z |
| Obs used |
382 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
9.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-04-08T07:54:38.131200Z |
| Discovery magnitude (MPC) |
18.63 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-03-02.0000000 |
| e |
0.99284896 |
| q (au) |
5.348262 |
| a (au) |
747.900004 |
| i (deg) |
122.128347 |
| Ω (om, deg) |
171.394166 |
| ω (w, deg) |
328.732947 |
| M (ma, deg) |
359.995012 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.361 + 3.566\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.361 |
| n |
3.566 |
| gf |
0.985 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.927 |
| 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 |
11:58:28.41 |
-05:54:38.2 |
HIP 58371 |
10.47 |
| 2026-02-03 12:00 |
11:58:10.19 |
-05:49:56.2 |
HIP 58371 |
4.49 |
| 2026-02-04 00:00 |
11:57:51.79 |
-05:45:12.4 |
HIP 58371 |
4.03 |
| 2026-02-04 12:00 |
11:57:33.22 |
-05:40:26.7 |
HIP 58371 |
10.00 |
| 2026-02-05 00:00 |
11:57:14.47 |
-05:35:39.3 |
HIP 58371 |
16.54 |
| 2026-02-05 12:00 |
11:56:55.55 |
-05:30:50.1 |
HIP 58371 |
23.22 |
| 2026-02-06 00:00 |
11:56:36.47 |
-05:25:59.1 |
HIP 58137 |
25.00 |
| 2026-02-06 12:00 |
11:56:17.21 |
-05:21:06.3 |
HIP 58137 |
18.16 |
| 2026-02-07 00:00 |
11:55:57.78 |
-05:16:11.7 |
HIP 58137 |
11.27 |
| 2026-02-07 12:00 |
11:55:38.19 |
-05:11:15.5 |
HIP 58137 |
4.33 |
| 2026-02-08 00:00 |
11:55:18.43 |
-05:06:17.4 |
HIP 58137 |
2.67 |
| 2026-02-08 12:00 |
11:54:58.51 |
-05:01:17.7 |
HIP 58137 |
9.71 |
| 2026-02-09 00:00 |
11:54:38.43 |
-04:56:16.2 |
HIP 58137 |
16.80 |
| 2026-02-09 12:00 |
11:54:18.18 |
-04:51:13.1 |
HIP 57980 |
16.74 |
| 2026-02-10 00:00 |
11:53:57.78 |
-04:46:08.2 |
HIP 57980 |
18.84 |
| 2026-02-10 12:00 |
11:53:37.23 |
-04:41:01.7 |
HIP 58042 |
20.84 |
| 2026-02-11 00:00 |
11:53:16.51 |
-04:35:53.5 |
HIP 58042 |
19.65 |
| 2026-02-11 12:00 |
11:52:55.65 |
-04:30:43.8 |
HIP 58042 |
21.10 |
| 2026-02-12 00:00 |
11:52:34.63 |
-04:25:32.3 |
HIP 58042 |
24.77 |
| 2026-02-12 12:00 |
11:52:13.47 |
-04:20:19.3 |
HIP 58042 |
29.88 |
| 2026-02-13 00:00 |
11:51:52.15 |
-04:15:04.7 |
HIP 57972 |
32.44 |
| 2026-02-13 12:00 |
11:51:30.70 |
-04:09:48.6 |
HIP 57972 |
33.63 |
| 2026-02-14 00:00 |
11:51:09.10 |
-04:04:30.9 |
HIP 57972 |
36.39 |
| 2026-02-14 12:00 |
11:50:47.36 |
-03:59:11.6 |
HIP 57972 |
40.42 |
| 2026-02-15 00:00 |
11:50:25.48 |
-03:53:50.9 |
HIP 57972 |
45.41 |
| 2026-02-15 12:00 |
11:50:03.46 |
-03:48:28.7 |
HIP 57593 |
41.89 |
| 2026-02-16 00:00 |
11:49:41.31 |
-03:43:05.0 |
HIP 57593 |
34.32 |
| 2026-02-16 12:00 |
11:49:19.03 |
-03:37:39.8 |
HIP 57593 |
26.80 |
| 2026-02-17 00:00 |
11:48:56.61 |
-03:32:13.3 |
HIP 57593 |
19.43 |
| 2026-02-17 12:00 |
11:48:34.07 |
-03:26:45.3 |
HIP 57593 |
12.58 |
| 2026-02-18 00:00 |
11:48:11.41 |
-03:21:16.0 |
HIP 57593 |
7.85 |
| 2026-02-18 12:00 |
11:47:48.62 |
-03:15:45.3 |
HIP 57593 |
9.48 |
| 2026-02-19 00:00 |
11:47:25.72 |
-03:10:13.3 |
HIP 57519 |
5.24 |
| 2026-02-19 12:00 |
11:47:02.69 |
-03:04:40.0 |
HIP 57519 |
4.60 |
| 2026-02-20 00:00 |
11:46:39.56 |
-02:59:05.4 |
HIP 57419 |
5.10 |
| 2026-02-20 12:00 |
11:46:16.31 |
-02:53:29.6 |
HIP 57419 |
6.70 |
| 2026-02-21 00:00 |
11:45:52.95 |
-02:47:52.5 |
HIP 57419 |
13.96 |
| 2026-02-21 12:00 |
11:45:29.48 |
-02:42:14.3 |
HIP 57419 |
21.85 |
| 2026-02-22 00:00 |
11:45:05.91 |
-02:36:34.9 |
HIP 57208 |
24.61 |
| 2026-02-22 12:00 |
11:44:42.24 |
-02:30:54.3 |
HIP 57208 |
16.44 |
| 2026-02-23 00:00 |
11:44:18.48 |
-02:25:12.6 |
HIP 57208 |
8.31 |
| 2026-02-23 12:00 |
11:43:54.61 |
-02:19:29.9 |
HIP 57208 |
1.71 |
| 2026-02-24 00:00 |
11:43:30.66 |
-02:13:46.1 |
HIP 57208 |
8.58 |