| 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) |
| 2026-03-26 00:00 |
09:56:07.33 |
+31:57:37.9 |
HIP 48740 |
14.16 |
| 2026-03-26 12:00 |
09:55:59.46 |
+31:57:46.1 |
HIP 48740 |
14.93 |
| 2026-03-27 00:00 |
09:55:51.65 |
+31:57:53.7 |
HIP 48740 |
15.84 |
| 2026-03-27 12:00 |
09:55:43.90 |
+31:58:00.9 |
HIP 48740 |
16.84 |
| 2026-03-28 00:00 |
09:55:36.21 |
+31:58:07.5 |
HIP 48740 |
17.93 |
| 2026-03-28 12:00 |
09:55:28.57 |
+31:58:13.7 |
HIP 48740 |
19.08 |
| 2026-03-29 00:00 |
09:55:20.99 |
+31:58:19.3 |
HIP 48740 |
20.28 |
| 2026-03-29 12:00 |
09:55:13.46 |
+31:58:24.5 |
HIP 48570 |
20.11 |
| 2026-03-30 00:00 |
09:55:06.00 |
+31:58:29.1 |
HIP 48570 |
19.25 |
| 2026-03-30 12:00 |
09:54:58.59 |
+31:58:33.3 |
HIP 48570 |
18.49 |
| 2026-03-31 00:00 |
09:54:51.25 |
+31:58:36.9 |
HIP 48570 |
17.86 |
| 2026-03-31 12:00 |
09:54:43.96 |
+31:58:40.1 |
HIP 48570 |
17.35 |
| 2026-04-01 00:00 |
09:54:36.73 |
+31:58:42.8 |
HIP 48570 |
16.97 |
| 2026-04-01 12:00 |
09:54:29.56 |
+31:58:45.0 |
HIP 48570 |
16.74 |
| 2026-04-02 00:00 |
09:54:22.46 |
+31:58:46.7 |
HIP 48570 |
16.65 |
| 2026-04-02 12:00 |
09:54:15.41 |
+31:58:47.9 |
HIP 48570 |
16.70 |
| 2026-04-03 00:00 |
09:54:08.43 |
+31:58:48.6 |
HIP 48570 |
16.89 |
| 2026-04-03 12:00 |
09:54:01.51 |
+31:58:48.9 |
HIP 48570 |
17.22 |
| 2026-04-04 00:00 |
09:53:54.65 |
+31:58:48.7 |
HIP 48570 |
17.66 |
| 2026-04-04 12:00 |
09:53:47.85 |
+31:58:48.0 |
HIP 48570 |
18.20 |
| 2026-04-05 00:00 |
09:53:41.12 |
+31:58:46.8 |
HIP 48570 |
18.85 |
| 2026-04-05 12:00 |
09:53:34.45 |
+31:58:45.1 |
HIP 48570 |
19.57 |
| 2026-04-06 00:00 |
09:53:27.84 |
+31:58:43.0 |
HIP 48570 |
20.37 |
| 2026-04-06 12:00 |
09:53:21.30 |
+31:58:40.4 |
HIP 48570 |
21.22 |
| 2026-04-07 00:00 |
09:53:14.82 |
+31:58:37.3 |
HIP 48570 |
22.13 |
| 2026-04-07 12:00 |
09:53:08.41 |
+31:58:33.8 |
HIP 48570 |
23.08 |
| 2026-04-08 00:00 |
09:53:02.06 |
+31:58:29.8 |
HIP 48570 |
24.07 |
| 2026-04-08 12:00 |
09:52:55.78 |
+31:58:25.3 |
HIP 48570 |
25.08 |
| 2026-04-09 00:00 |
09:52:49.56 |
+31:58:20.4 |
HIP 48570 |
26.12 |
| 2026-04-09 12:00 |
09:52:43.41 |
+31:58:15.0 |
HIP 48435 |
25.88 |
| 2026-04-10 00:00 |
09:52:37.33 |
+31:58:09.2 |
HIP 48435 |
25.66 |
| 2026-04-10 12:00 |
09:52:31.31 |
+31:58:02.9 |
HIP 48435 |
25.50 |
| 2026-04-11 00:00 |
09:52:25.36 |
+31:57:56.1 |
HIP 48435 |
25.39 |
| 2026-04-11 12:00 |
09:52:19.48 |
+31:57:48.9 |
HIP 48435 |
25.34 |
| 2026-04-12 00:00 |
09:52:13.67 |
+31:57:41.3 |
HIP 48435 |
25.34 |
| 2026-04-12 12:00 |
09:52:07.92 |
+31:57:33.2 |
HIP 48435 |
25.40 |
| 2026-04-13 00:00 |
09:52:02.24 |
+31:57:24.6 |
HIP 48435 |
25.50 |
| 2026-04-13 12:00 |
09:51:56.64 |
+31:57:15.6 |
HIP 48435 |
25.65 |
| 2026-04-14 00:00 |
09:51:51.09 |
+31:57:06.2 |
HIP 48435 |
25.84 |
| 2026-04-14 12:00 |
09:51:45.62 |
+31:56:56.3 |
HIP 48435 |
26.07 |
| 2026-04-15 00:00 |
09:51:40.22 |
+31:56:46.0 |
HIP 48435 |
26.34 |
| 2026-04-15 12:00 |
09:51:34.89 |
+31:56:35.3 |
HIP 48435 |
26.64 |
| 2026-04-16 00:00 |
09:51:29.63 |
+31:56:24.1 |
HIP 48435 |
26.98 |