| Parameter |
Value |
| Designation |
P/2020 X1 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-07-20T02:53:09.418560Z |
| Orbit solution date (soln_date, UTC) |
2024-04-16T14:26:07Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
21.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-12-04T10:41:02.601600Z |
| Discovery magnitude (MPC) |
18.92 o |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-01-23.0000000 |
| e |
0.36528017 |
| q (au) |
2.871814 |
| a (au) |
4.524538 |
| i (deg) |
31.703026 |
| Ω (om, deg) |
56.028268 |
| ω (w, deg) |
323.208571 |
| M (ma, deg) |
19.138368 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.087 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.087 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
14:28:36.58 |
-03:55:55.7 |
HIP 70906 |
28.14 |
| 2026-06-01 12:00 |
14:28:22.89 |
-03:56:20.4 |
HIP 70906 |
30.51 |
| 2026-06-02 00:00 |
14:28:09.30 |
-03:56:46.0 |
HIP 70906 |
33.03 |
| 2026-06-02 12:00 |
14:27:55.83 |
-03:57:12.4 |
HIP 70653 |
31.24 |
| 2026-06-03 00:00 |
14:27:42.48 |
-03:57:39.8 |
HIP 70653 |
29.56 |
| 2026-06-03 12:00 |
14:27:29.25 |
-03:58:07.9 |
HIP 70556 |
27.49 |
| 2026-06-04 00:00 |
14:27:16.13 |
-03:58:37.0 |
HIP 70556 |
25.14 |
| 2026-06-04 12:00 |
14:27:03.14 |
-03:59:06.9 |
HIP 70556 |
23.07 |
| 2026-06-05 00:00 |
14:26:50.27 |
-03:59:37.7 |
HIP 70556 |
21.33 |
| 2026-06-05 12:00 |
14:26:37.52 |
-04:00:09.3 |
HIP 70556 |
20.00 |
| 2026-06-06 00:00 |
14:26:24.90 |
-04:00:41.9 |
HIP 70556 |
19.14 |
| 2026-06-06 12:00 |
14:26:12.40 |
-04:01:15.3 |
HIP 70556 |
18.83 |
| 2026-06-07 00:00 |
14:26:00.03 |
-04:01:49.5 |
HIP 70463 |
18.26 |
| 2026-06-07 12:00 |
14:25:47.79 |
-04:02:24.7 |
HIP 70463 |
15.23 |
| 2026-06-08 00:00 |
14:25:35.68 |
-04:03:00.7 |
HIP 70463 |
12.27 |
| 2026-06-08 12:00 |
14:25:23.71 |
-04:03:37.6 |
HIP 70463 |
9.43 |
| 2026-06-09 00:00 |
14:25:11.86 |
-04:04:15.4 |
HIP 70463 |
6.80 |
| 2026-06-09 12:00 |
14:25:00.15 |
-04:04:54.0 |
HIP 70463 |
4.71 |
| 2026-06-10 00:00 |
14:24:48.57 |
-04:05:33.5 |
HIP 70463 |
4.03 |
| 2026-06-10 12:00 |
14:24:37.13 |
-04:06:14.0 |
HIP 70463 |
5.26 |
| 2026-06-11 00:00 |
14:24:25.82 |
-04:06:55.2 |
HIP 70463 |
7.50 |
| 2026-06-11 12:00 |
14:24:14.66 |
-04:07:37.4 |
HIP 70463 |
10.06 |
| 2026-06-12 00:00 |
14:24:03.63 |
-04:08:20.4 |
HIP 70463 |
12.73 |
| 2026-06-12 12:00 |
14:23:52.74 |
-04:09:04.3 |
HIP 70463 |
15.44 |
| 2026-06-13 00:00 |
14:23:42.00 |
-04:09:49.1 |
HIP 70463 |
18.15 |
| 2026-06-13 12:00 |
14:23:31.40 |
-04:10:34.8 |
HIP 70463 |
20.86 |
| 2026-06-14 00:00 |
14:23:20.94 |
-04:11:21.4 |
HIP 70463 |
23.55 |
| 2026-06-14 12:00 |
14:23:10.63 |
-04:12:08.8 |
HIP 70463 |
26.22 |
| 2026-06-15 00:00 |
14:23:00.46 |
-04:12:57.1 |
HIP 70463 |
28.86 |
| 2026-06-15 12:00 |
14:22:50.45 |
-04:13:46.3 |
HIP 70258 |
30.50 |
| 2026-06-16 00:00 |
14:22:40.57 |
-04:14:36.3 |
HIP 70258 |
31.06 |
| 2026-06-16 12:00 |
14:22:30.85 |
-04:15:27.2 |
HIP 70161 |
30.02 |
| 2026-06-17 00:00 |
14:22:21.28 |
-04:16:19.0 |
HIP 70161 |
27.94 |
| 2026-06-17 12:00 |
14:22:11.86 |
-04:17:11.7 |
HIP 70161 |
25.95 |
| 2026-06-18 00:00 |
14:22:02.59 |
-04:18:05.2 |
HIP 70161 |
24.05 |
| 2026-06-18 12:00 |
14:21:53.47 |
-04:18:59.6 |
HIP 70161 |
22.28 |
| 2026-06-19 00:00 |
14:21:44.51 |
-04:19:54.8 |
HIP 70161 |
20.63 |
| 2026-06-19 12:00 |
14:21:35.69 |
-04:20:50.9 |
HIP 70161 |
19.15 |
| 2026-06-20 00:00 |
14:21:27.03 |
-04:21:47.9 |
HIP 70161 |
17.86 |
| 2026-06-20 12:00 |
14:21:18.53 |
-04:22:45.7 |
HIP 70161 |
16.78 |
| 2026-06-21 00:00 |
14:21:10.18 |
-04:23:44.4 |
HIP 70161 |
15.95 |
| 2026-06-21 12:00 |
14:21:01.99 |
-04:24:43.9 |
HIP 70161 |
15.40 |
| 2026-06-22 00:00 |
14:20:53.95 |
-04:25:44.2 |
HIP 70161 |
15.15 |