| 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
$$
M_a = (17.042 + 3.130\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.042 |
| n |
3.130 |
| gf |
0.986 |
| gb |
-0.629 |
| k |
0.891 |
| δ90 |
9.740 |
| 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 |
09:48:30.22 |
+31:15:01.0 |
HIP 48212 |
19.37 |
| 2026-06-01 12:00 |
09:48:31.45 |
+31:14:22.5 |
HIP 48212 |
18.81 |
| 2026-06-02 00:00 |
09:48:32.73 |
+31:13:44.0 |
HIP 48212 |
18.25 |
| 2026-06-02 12:00 |
09:48:34.07 |
+31:13:05.3 |
HIP 48212 |
17.68 |
| 2026-06-03 00:00 |
09:48:35.48 |
+31:12:26.4 |
HIP 48212 |
17.11 |
| 2026-06-03 12:00 |
09:48:36.94 |
+31:11:47.4 |
HIP 48212 |
16.54 |
| 2026-06-04 00:00 |
09:48:38.47 |
+31:11:08.3 |
HIP 48212 |
15.97 |
| 2026-06-04 12:00 |
09:48:40.05 |
+31:10:29.0 |
HIP 48212 |
15.41 |
| 2026-06-05 00:00 |
09:48:41.70 |
+31:09:49.6 |
HIP 48212 |
14.84 |
| 2026-06-05 12:00 |
09:48:43.41 |
+31:09:10.1 |
HIP 48212 |
14.27 |
| 2026-06-06 00:00 |
09:48:45.17 |
+31:08:30.4 |
HIP 48212 |
13.72 |
| 2026-06-06 12:00 |
09:48:46.99 |
+31:07:50.6 |
HIP 48212 |
13.17 |
| 2026-06-07 00:00 |
09:48:48.88 |
+31:07:10.7 |
HIP 48212 |
12.63 |
| 2026-06-07 12:00 |
09:48:50.82 |
+31:06:30.7 |
HIP 48212 |
12.10 |
| 2026-06-08 00:00 |
09:48:52.82 |
+31:05:50.5 |
HIP 48212 |
11.59 |
| 2026-06-08 12:00 |
09:48:54.87 |
+31:05:10.2 |
HIP 48212 |
11.10 |
| 2026-06-09 00:00 |
09:48:56.99 |
+31:04:29.9 |
HIP 48212 |
10.63 |
| 2026-06-09 12:00 |
09:48:59.16 |
+31:03:49.4 |
HIP 48212 |
10.20 |
| 2026-06-10 00:00 |
09:49:01.39 |
+31:03:08.7 |
HIP 48212 |
9.80 |
| 2026-06-10 12:00 |
09:49:03.67 |
+31:02:28.0 |
HIP 48212 |
9.45 |
| 2026-06-11 00:00 |
09:49:06.02 |
+31:01:47.2 |
HIP 48212 |
9.15 |
| 2026-06-11 12:00 |
09:49:08.41 |
+31:01:06.3 |
HIP 48212 |
8.91 |
| 2026-06-12 00:00 |
09:49:10.87 |
+31:00:25.3 |
HIP 48212 |
8.74 |
| 2026-06-12 12:00 |
09:49:13.38 |
+30:59:44.2 |
HIP 48212 |
8.64 |
| 2026-06-13 00:00 |
09:49:15.94 |
+30:59:03.0 |
HIP 48212 |
8.62 |
| 2026-06-13 12:00 |
09:49:18.56 |
+30:58:21.7 |
HIP 48212 |
8.69 |
| 2026-06-14 00:00 |
09:49:21.23 |
+30:57:40.3 |
HIP 48212 |
8.83 |
| 2026-06-14 12:00 |
09:49:23.96 |
+30:56:58.8 |
HIP 48212 |
9.06 |
| 2026-06-15 00:00 |
09:49:26.74 |
+30:56:17.3 |
HIP 48212 |
9.37 |
| 2026-06-15 12:00 |
09:49:29.57 |
+30:55:35.7 |
HIP 48212 |
9.74 |
| 2026-06-16 00:00 |
09:49:32.46 |
+30:54:54.0 |
HIP 48212 |
10.19 |
| 2026-06-16 12:00 |
09:49:35.40 |
+30:54:12.2 |
HIP 48212 |
10.70 |
| 2026-06-17 00:00 |
09:49:38.39 |
+30:53:30.4 |
HIP 48212 |
11.26 |
| 2026-06-17 12:00 |
09:49:41.44 |
+30:52:48.5 |
HIP 48212 |
11.87 |
| 2026-06-18 00:00 |
09:49:44.53 |
+30:52:06.5 |
HIP 48212 |
12.53 |
| 2026-06-18 12:00 |
09:49:47.68 |
+30:51:24.5 |
HIP 48212 |
13.22 |
| 2026-06-19 00:00 |
09:49:50.87 |
+30:50:42.4 |
HIP 48212 |
13.95 |
| 2026-06-19 12:00 |
09:49:54.12 |
+30:50:00.3 |
HIP 48212 |
14.71 |
| 2026-06-20 00:00 |
09:49:57.42 |
+30:49:18.1 |
HIP 48212 |
15.50 |
| 2026-06-20 12:00 |
09:50:00.76 |
+30:48:35.9 |
HIP 48212 |
16.31 |
| 2026-06-21 00:00 |
09:50:04.16 |
+30:47:53.7 |
HIP 48212 |
17.15 |
| 2026-06-21 12:00 |
09:50:07.60 |
+30:47:11.4 |
HIP 48212 |
18.01 |
| 2026-06-22 00:00 |
09:50:11.09 |
+30:46:29.0 |
HIP 48212 |
18.89 |