C/2024 G7 (ATLAS)
| Parameter |
Value |
| Designation |
C/2024 G7 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-10T08:29:18.660480Z |
| Orbit solution date (soln_date, UTC) |
2025-05-01T08:42:24Z |
| Obs used |
79 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-03T08:20:06.028800Z |
| Discovery magnitude (MPC) |
19.41 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-06-02.0000000 |
| e |
1.00151857 |
| q (au) |
6.027544 |
| a (au) |
-3969.214809 |
| i (deg) |
131.518775 |
| Ω (om, deg) |
191.944670 |
| ω (w, deg) |
289.666653 |
| M (ma, deg) |
-0.000999 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.242 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.242 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.571 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
14:27:41.38 |
-43:54:05.6 |
HIP 70615 |
13.73 |
| 2026-02-03 12:00 |
14:27:32.06 |
-43:54:10.2 |
HIP 70615 |
12.45 |
| 2026-02-04 00:00 |
14:27:22.52 |
-43:54:13.9 |
HIP 70615 |
11.24 |
| 2026-02-04 12:00 |
14:27:12.74 |
-43:54:16.8 |
HIP 70615 |
10.15 |
| 2026-02-05 00:00 |
14:27:02.74 |
-43:54:18.9 |
HIP 70615 |
9.23 |
| 2026-02-05 12:00 |
14:26:52.50 |
-43:54:20.1 |
HIP 70615 |
8.58 |
| 2026-02-06 00:00 |
14:26:42.04 |
-43:54:20.4 |
HIP 70615 |
8.27 |
| 2026-02-06 12:00 |
14:26:31.34 |
-43:54:19.9 |
HIP 70615 |
8.38 |
| 2026-02-07 00:00 |
14:26:20.42 |
-43:54:18.5 |
HIP 70615 |
8.92 |
| 2026-02-07 12:00 |
14:26:09.26 |
-43:54:16.2 |
HIP 70615 |
9.85 |
| 2026-02-08 00:00 |
14:25:57.86 |
-43:54:13.0 |
HIP 70615 |
11.08 |
| 2026-02-08 12:00 |
14:25:46.24 |
-43:54:08.8 |
HIP 70615 |
12.55 |
| 2026-02-09 00:00 |
14:25:34.38 |
-43:54:03.6 |
HIP 70615 |
14.21 |
| 2026-02-09 12:00 |
14:25:22.29 |
-43:53:57.5 |
HIP 70519 |
15.42 |
| 2026-02-10 00:00 |
14:25:09.96 |
-43:53:50.4 |
HIP 70519 |
15.66 |
| 2026-02-10 12:00 |
14:24:57.40 |
-43:53:42.3 |
HIP 70350 |
14.86 |
| 2026-02-11 00:00 |
14:24:44.60 |
-43:53:33.1 |
HIP 70350 |
12.71 |
| 2026-02-11 12:00 |
14:24:31.57 |
-43:53:22.9 |
HIP 70350 |
10.59 |
| 2026-02-12 00:00 |
14:24:18.31 |
-43:53:11.6 |
HIP 70350 |
8.56 |
| 2026-02-12 12:00 |
14:24:04.81 |
-43:52:59.3 |
HIP 70350 |
6.77 |
| 2026-02-13 00:00 |
14:23:51.08 |
-43:52:45.8 |
HIP 70350 |
5.49 |
| 2026-02-13 12:00 |
14:23:37.11 |
-43:52:31.3 |
HIP 70350 |
5.19 |
| 2026-02-14 00:00 |
14:23:22.91 |
-43:52:15.6 |
HIP 70350 |
6.08 |
| 2026-02-14 12:00 |
14:23:08.47 |
-43:51:58.7 |
HIP 70350 |
7.81 |
| 2026-02-15 00:00 |
14:22:53.80 |
-43:51:40.7 |
HIP 70350 |
9.97 |
| 2026-02-15 12:00 |
14:22:38.90 |
-43:51:21.5 |
HIP 70350 |
12.38 |
| 2026-02-16 00:00 |
14:22:23.76 |
-43:51:01.1 |
HIP 70350 |
14.94 |
| 2026-02-16 12:00 |
14:22:08.38 |
-43:50:39.5 |
HIP 70350 |
17.60 |
| 2026-02-17 00:00 |
14:21:52.78 |
-43:50:16.6 |
HIP 70350 |
20.34 |
| 2026-02-17 12:00 |
14:21:36.94 |
-43:49:52.5 |
HIP 70163 |
20.79 |
| 2026-02-18 00:00 |
14:21:20.86 |
-43:49:27.1 |
HIP 70163 |
20.15 |
| 2026-02-18 12:00 |
14:21:04.56 |
-43:49:00.4 |
HIP 70163 |
19.90 |
| 2026-02-19 00:00 |
14:20:48.02 |
-43:48:32.3 |
HIP 70163 |
20.08 |
| 2026-02-19 12:00 |
14:20:31.25 |
-43:48:03.0 |
HIP 70163 |
20.72 |
| 2026-02-20 00:00 |
14:20:14.25 |
-43:47:32.3 |
HIP 70163 |
21.77 |
| 2026-02-20 12:00 |
14:19:57.03 |
-43:47:00.2 |
HIP 70163 |
23.21 |
| 2026-02-21 00:00 |
14:19:39.57 |
-43:46:26.8 |
HIP 70163 |
24.98 |
| 2026-02-21 12:00 |
14:19:21.88 |
-43:45:52.0 |
HIP 69849 |
24.86 |
| 2026-02-22 00:00 |
14:19:03.97 |
-43:45:15.7 |
HIP 69849 |
23.12 |
| 2026-02-22 12:00 |
14:18:45.83 |
-43:44:38.0 |
HIP 69849 |
21.74 |
| 2026-02-23 00:00 |
14:18:27.46 |
-43:43:58.9 |
HIP 69849 |
20.80 |
| 2026-02-23 12:00 |
14:18:08.87 |
-43:43:18.3 |
HIP 69849 |
20.40 |
| 2026-02-24 00:00 |
14:17:50.06 |
-43:42:36.2 |
HIP 69849 |
20.59 |