| Parameter |
Value |
| Designation |
C/2024 G7 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-10T07:30:42.638400Z |
| Orbit solution date (soln_date, UTC) |
2026-07-16T19:12:17Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
11.700 |
| 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) |
2024-08-02.0000000 |
| e |
1.00163060 |
| q (au) |
6.027583 |
| a (au) |
-3696.547778 |
| i (deg) |
131.518826 |
| Ω (om, deg) |
191.947715 |
| ω (w, deg) |
289.665421 |
| M (ma, deg) |
-0.000843 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.493 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.493 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-1.000 |
| 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) |
| 2026-09-25 00:00 |
13:04:34.58 |
-22:08:33.8 |
HIP 63889 |
14.82 |
| 2026-09-25 12:00 |
13:04:46.13 |
-22:08:01.2 |
HIP 63889 |
12.11 |
| 2026-09-26 00:00 |
13:04:57.69 |
-22:07:29.3 |
HIP 63889 |
9.40 |
| 2026-09-26 12:00 |
13:05:09.27 |
-22:06:58.0 |
HIP 63889 |
6.71 |
| 2026-09-27 00:00 |
13:05:20.87 |
-22:06:27.3 |
HIP 63889 |
4.09 |
| 2026-09-27 12:00 |
13:05:32.48 |
-22:05:57.2 |
HIP 63889 |
1.85 |
| 2026-09-28 00:00 |
13:05:44.11 |
-22:05:27.7 |
HIP 63889 |
2.25 |
| 2026-09-28 12:00 |
13:05:55.75 |
-22:04:58.9 |
HIP 63889 |
4.67 |
| 2026-09-29 00:00 |
13:06:07.40 |
-22:04:30.6 |
HIP 63889 |
7.32 |
| 2026-09-29 12:00 |
13:06:19.06 |
-22:04:03.0 |
HIP 63889 |
10.02 |
| 2026-09-30 00:00 |
13:06:30.74 |
-22:03:35.9 |
HIP 63889 |
12.74 |
| 2026-09-30 12:00 |
13:06:42.43 |
-22:03:09.4 |
HIP 63889 |
15.47 |
| 2026-10-01 00:00 |
13:06:54.13 |
-22:02:43.5 |
HIP 63889 |
18.21 |
| 2026-10-01 12:00 |
13:07:05.83 |
-22:02:18.2 |
HIP 63889 |
20.95 |
| 2026-10-02 00:00 |
13:07:17.55 |
-22:01:53.4 |
HIP 63889 |
23.69 |
| 2026-10-02 12:00 |
13:07:29.28 |
-22:01:29.1 |
HIP 63889 |
26.44 |
| 2026-10-03 00:00 |
13:07:41.01 |
-22:01:05.5 |
HIP 63889 |
29.18 |
| 2026-10-03 12:00 |
13:07:52.75 |
-22:00:42.4 |
HIP 64219 |
27.61 |
| 2026-10-04 00:00 |
13:08:04.50 |
-22:00:19.8 |
HIP 64219 |
25.29 |
| 2026-10-04 12:00 |
13:08:16.25 |
-21:59:57.7 |
HIP 64219 |
23.07 |
| 2026-10-05 00:00 |
13:08:28.00 |
-21:59:36.2 |
HIP 64219 |
20.96 |
| 2026-10-05 12:00 |
13:08:39.77 |
-21:59:15.2 |
HIP 64219 |
19.00 |
| 2026-10-06 00:00 |
13:08:51.53 |
-21:58:54.7 |
HIP 64219 |
17.26 |
| 2026-10-06 12:00 |
13:09:03.30 |
-21:58:34.7 |
HIP 64219 |
15.79 |
| 2026-10-07 00:00 |
13:09:15.07 |
-21:58:15.2 |
HIP 64219 |
14.69 |
| 2026-10-07 12:00 |
13:09:26.84 |
-21:57:56.3 |
HIP 64219 |
14.04 |
| 2026-10-08 00:00 |
13:09:38.61 |
-21:57:37.8 |
HIP 64219 |
13.91 |
| 2026-10-08 12:00 |
13:09:50.38 |
-21:57:19.7 |
HIP 64219 |
14.30 |
| 2026-10-09 00:00 |
13:10:02.15 |
-21:57:02.2 |
HIP 64219 |
15.17 |
| 2026-10-09 12:00 |
13:10:13.91 |
-21:56:45.1 |
HIP 64219 |
16.46 |
| 2026-10-10 00:00 |
13:10:25.68 |
-21:56:28.5 |
HIP 64219 |
18.06 |
| 2026-10-10 12:00 |
13:10:37.44 |
-21:56:12.4 |
HIP 64219 |
19.91 |
| 2026-10-11 00:00 |
13:10:49.20 |
-21:55:56.7 |
HIP 64219 |
21.94 |
| 2026-10-11 12:00 |
13:11:00.95 |
-21:55:41.4 |
HIP 64219 |
24.10 |
| 2026-10-12 00:00 |
13:11:12.69 |
-21:55:26.6 |
HIP 64219 |
26.37 |
| 2026-10-12 12:00 |
13:11:24.43 |
-21:55:12.2 |
HIP 64219 |
28.71 |
| 2026-10-13 00:00 |
13:11:36.16 |
-21:54:58.2 |
HIP 64219 |
31.11 |
| 2026-10-13 12:00 |
13:11:47.88 |
-21:54:44.6 |
HIP 64219 |
33.55 |
| 2026-10-14 00:00 |
13:11:59.60 |
-21:54:31.4 |
HIP 64279 |
35.36 |
| 2026-10-14 12:00 |
13:12:11.30 |
-21:54:18.7 |
HIP 64279 |
37.26 |
| 2026-10-15 00:00 |
13:12:22.99 |
-21:54:06.3 |
HIP 64562 |
35.83 |
| 2026-10-15 12:00 |
13:12:34.67 |
-21:53:54.3 |
HIP 64562 |
34.34 |
| 2026-10-16 00:00 |
13:12:46.34 |
-21:53:42.7 |
HIP 64562 |
32.99 |