C/2023 F3 (ATLAS)
| Parameter |
Value |
| Designation |
C/2023 F3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-02T15:31:35.097600Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:18Z |
| Obs used |
888 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
4.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-03-28T08:28:27.840000Z |
| Discovery magnitude (MPC) |
18.85 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-25.0000000 |
| e |
1.00398680 |
| q (au) |
5.190780 |
| a (au) |
-1301.992469 |
| i (deg) |
145.963355 |
| Ω (om, deg) |
109.461230 |
| ω (w, deg) |
265.531335 |
| M (ma, deg) |
-0.001461 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.509 + 2.899\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.509 |
| n |
2.899 |
| gf |
1.000 |
| gb |
-0.762 |
| k |
0.800 |
| δ90 |
9.998 |
| 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 |
10:12:31.67 |
-23:06:40.5 |
HIP 50115 |
18.62 |
| 2026-02-03 12:00 |
10:11:58.62 |
-23:03:44.5 |
HIP 49948 |
25.92 |
| 2026-02-04 00:00 |
10:11:25.49 |
-23:00:46.0 |
HIP 49948 |
23.66 |
| 2026-02-04 12:00 |
10:10:52.30 |
-22:57:45.0 |
HIP 49948 |
24.09 |
| 2026-02-05 00:00 |
10:10:19.04 |
-22:54:41.5 |
HIP 49948 |
27.13 |
| 2026-02-05 12:00 |
10:09:45.73 |
-22:51:35.6 |
HIP 49948 |
32.05 |
| 2026-02-06 00:00 |
10:09:12.37 |
-22:48:27.1 |
HIP 49610 |
29.97 |
| 2026-02-06 12:00 |
10:08:38.95 |
-22:45:16.2 |
HIP 49610 |
22.14 |
| 2026-02-07 00:00 |
10:08:05.48 |
-22:42:02.8 |
HIP 49610 |
14.82 |
| 2026-02-07 12:00 |
10:07:31.97 |
-22:38:46.9 |
HIP 49610 |
9.40 |
| 2026-02-08 00:00 |
10:06:58.42 |
-22:35:28.6 |
HIP 49610 |
9.90 |
| 2026-02-08 12:00 |
10:06:24.84 |
-22:32:07.8 |
HIP 49610 |
15.79 |
| 2026-02-09 00:00 |
10:05:51.22 |
-22:28:44.7 |
HIP 49337 |
21.84 |
| 2026-02-09 12:00 |
10:05:17.57 |
-22:25:19.1 |
HIP 49337 |
15.85 |
| 2026-02-10 00:00 |
10:04:43.89 |
-22:21:51.0 |
HIP 49337 |
13.04 |
| 2026-02-10 12:00 |
10:04:10.20 |
-22:18:20.6 |
HIP 49337 |
15.34 |
| 2026-02-11 00:00 |
10:03:36.48 |
-22:14:47.9 |
HIP 49216 |
14.31 |
| 2026-02-11 12:00 |
10:03:02.75 |
-22:11:12.7 |
HIP 49216 |
6.26 |
| 2026-02-12 00:00 |
10:02:29.02 |
-22:07:35.2 |
HIP 49216 |
4.60 |
| 2026-02-12 12:00 |
10:01:55.27 |
-22:03:55.4 |
HIP 49216 |
12.32 |
| 2026-02-13 00:00 |
10:01:21.52 |
-22:00:13.2 |
HIP 49216 |
20.79 |
| 2026-02-13 12:00 |
10:00:47.77 |
-21:56:28.7 |
HIP 48937 |
28.18 |
| 2026-02-14 00:00 |
10:00:14.03 |
-21:52:42.0 |
HIP 48937 |
24.61 |
| 2026-02-14 12:00 |
09:59:40.30 |
-21:48:53.0 |
HIP 48937 |
23.88 |
| 2026-02-15 00:00 |
09:59:06.58 |
-21:45:01.7 |
HIP 48856 |
23.18 |
| 2026-02-15 12:00 |
09:58:32.87 |
-21:41:08.2 |
HIP 48856 |
15.11 |
| 2026-02-16 00:00 |
09:57:59.19 |
-21:37:12.5 |
HIP 48856 |
8.46 |
| 2026-02-16 12:00 |
09:57:25.53 |
-21:33:14.5 |
HIP 48856 |
8.25 |
| 2026-02-17 00:00 |
09:56:51.90 |
-21:29:14.4 |
HIP 48747 |
14.56 |
| 2026-02-17 12:00 |
09:56:18.30 |
-21:25:12.2 |
HIP 48747 |
10.56 |
| 2026-02-18 00:00 |
09:55:44.73 |
-21:21:07.9 |
HIP 48747 |
12.87 |
| 2026-02-18 12:00 |
09:55:11.21 |
-21:17:01.4 |
HIP 48747 |
19.36 |
| 2026-02-19 00:00 |
09:54:37.73 |
-21:12:52.8 |
HIP 48747 |
27.19 |
| 2026-02-19 12:00 |
09:54:04.29 |
-21:08:42.2 |
HIP 48480 |
23.62 |
| 2026-02-20 00:00 |
09:53:30.91 |
-21:04:29.6 |
HIP 48480 |
16.85 |
| 2026-02-20 12:00 |
09:52:57.58 |
-21:00:15.0 |
HIP 48480 |
12.87 |
| 2026-02-21 00:00 |
09:52:24.31 |
-20:55:58.4 |
HIP 48480 |
14.28 |
| 2026-02-21 12:00 |
09:51:51.11 |
-20:51:39.8 |
HIP 48291 |
16.47 |
| 2026-02-22 00:00 |
09:51:17.97 |
-20:47:19.4 |
HIP 48291 |
7.87 |
| 2026-02-22 12:00 |
09:50:44.90 |
-20:42:57.0 |
HIP 48291 |
3.26 |
| 2026-02-23 00:00 |
09:50:11.90 |
-20:38:32.8 |
HIP 48291 |
10.83 |
| 2026-02-23 12:00 |
09:49:38.98 |
-20:34:06.7 |
HIP 48291 |
19.55 |
| 2026-02-24 00:00 |
09:49:06.14 |
-20:29:38.8 |
HIP 48291 |
28.38 |