C/2020 N2 (ATLAS)
| Parameter |
Value |
| Designation |
C/2020 N2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-08-23T17:05:24.480960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:09Z |
| Obs used |
88 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
6.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-13T12:55:53.097600Z |
| Discovery magnitude (MPC) |
18.29 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-07-30.0000000 |
| e |
0.98239504 |
| q (au) |
1.793804 |
| a (au) |
101.891955 |
| i (deg) |
161.034349 |
| Ω (om, deg) |
257.076442 |
| ω (w, deg) |
331.226561 |
| M (ma, deg) |
359.976319 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.039 + 3.130\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.039 |
| n |
3.130 |
| gf |
1.000 |
| gb |
-0.629 |
| k |
0.892 |
| 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) |
| 2026-02-03 00:00 |
10:12:16.33 |
+31:00:34.5 |
HIP 49914 |
16.36 |
| 2026-02-03 12:00 |
10:12:06.61 |
+31:01:29.4 |
HIP 49914 |
15.92 |
| 2026-02-04 00:00 |
10:11:56.85 |
+31:02:24.1 |
HIP 49914 |
15.79 |
| 2026-02-04 12:00 |
10:11:47.08 |
+31:03:18.5 |
HIP 49914 |
15.99 |
| 2026-02-05 00:00 |
10:11:37.28 |
+31:04:12.5 |
HIP 49914 |
16.49 |
| 2026-02-05 12:00 |
10:11:27.47 |
+31:05:06.3 |
HIP 49914 |
17.28 |
| 2026-02-06 00:00 |
10:11:17.63 |
+31:05:59.7 |
HIP 49914 |
18.32 |
| 2026-02-06 12:00 |
10:11:07.77 |
+31:06:52.8 |
HIP 49914 |
19.57 |
| 2026-02-07 00:00 |
10:10:57.89 |
+31:07:45.5 |
HIP 49773 |
18.20 |
| 2026-02-07 12:00 |
10:10:48.00 |
+31:08:37.9 |
HIP 49773 |
16.52 |
| 2026-02-08 00:00 |
10:10:38.08 |
+31:09:30.0 |
HIP 49773 |
15.00 |
| 2026-02-08 12:00 |
10:10:28.15 |
+31:10:21.7 |
HIP 49773 |
13.69 |
| 2026-02-09 00:00 |
10:10:18.21 |
+31:11:13.1 |
HIP 49773 |
12.66 |
| 2026-02-09 12:00 |
10:10:08.25 |
+31:12:04.2 |
HIP 49773 |
11.98 |
| 2026-02-10 00:00 |
10:09:58.27 |
+31:12:54.8 |
HIP 49773 |
11.71 |
| 2026-02-10 12:00 |
10:09:48.29 |
+31:13:45.1 |
HIP 49773 |
11.88 |
| 2026-02-11 00:00 |
10:09:38.29 |
+31:14:35.1 |
HIP 49773 |
12.47 |
| 2026-02-11 12:00 |
10:09:28.28 |
+31:15:24.7 |
HIP 49773 |
13.42 |
| 2026-02-12 00:00 |
10:09:18.26 |
+31:16:13.9 |
HIP 49773 |
14.67 |
| 2026-02-12 12:00 |
10:09:08.23 |
+31:17:02.7 |
HIP 49773 |
16.15 |
| 2026-02-13 00:00 |
10:08:58.19 |
+31:17:51.1 |
HIP 49773 |
17.79 |
| 2026-02-13 12:00 |
10:08:48.14 |
+31:18:39.1 |
HIP 49658 |
18.90 |
| 2026-02-14 00:00 |
10:08:38.09 |
+31:19:26.8 |
HIP 49658 |
17.46 |
| 2026-02-14 12:00 |
10:08:28.03 |
+31:20:14.0 |
HIP 49658 |
16.23 |
| 2026-02-15 00:00 |
10:08:17.96 |
+31:21:00.8 |
HIP 49658 |
15.25 |
| 2026-02-15 12:00 |
10:08:07.89 |
+31:21:47.3 |
HIP 49658 |
14.57 |
| 2026-02-16 00:00 |
10:07:57.82 |
+31:22:33.3 |
HIP 49658 |
14.24 |
| 2026-02-16 12:00 |
10:07:47.75 |
+31:23:18.9 |
HIP 49658 |
14.27 |
| 2026-02-17 00:00 |
10:07:37.67 |
+31:24:04.1 |
HIP 49658 |
14.67 |
| 2026-02-17 12:00 |
10:07:27.59 |
+31:24:48.9 |
HIP 49658 |
15.40 |
| 2026-02-18 00:00 |
10:07:17.52 |
+31:25:33.2 |
HIP 49658 |
16.42 |
| 2026-02-18 12:00 |
10:07:07.44 |
+31:26:17.1 |
HIP 49487 |
17.17 |
| 2026-02-19 00:00 |
10:06:57.37 |
+31:27:00.6 |
HIP 49487 |
16.34 |
| 2026-02-19 12:00 |
10:06:47.30 |
+31:27:43.6 |
HIP 49487 |
15.79 |
| 2026-02-20 00:00 |
10:06:37.24 |
+31:28:26.2 |
HIP 49487 |
15.54 |
| 2026-02-20 12:00 |
10:06:27.18 |
+31:29:08.4 |
HIP 49487 |
15.61 |
| 2026-02-21 00:00 |
10:06:17.12 |
+31:29:50.1 |
HIP 49487 |
16.00 |
| 2026-02-21 12:00 |
10:06:07.08 |
+31:30:31.3 |
HIP 49487 |
16.68 |
| 2026-02-22 00:00 |
10:05:57.04 |
+31:31:12.1 |
HIP 49487 |
17.62 |
| 2026-02-22 12:00 |
10:05:47.01 |
+31:31:52.4 |
HIP 49487 |
18.77 |
| 2026-02-23 00:00 |
10:05:36.98 |
+31:32:32.3 |
HIP 49487 |
20.10 |
| 2026-02-23 12:00 |
10:05:26.97 |
+31:33:11.7 |
HIP 49487 |
21.57 |
| 2026-02-24 00:00 |
10:05:16.97 |
+31:33:50.7 |
HIP 49487 |
23.15 |