| 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) |
| 2026-05-12 00:00 |
09:48:34.93 |
+31:37:59.6 |
HIP 48082 |
29.41 |
| 2026-05-12 12:00 |
09:48:33.48 |
+31:37:29.7 |
HIP 48082 |
29.84 |
| 2026-05-13 00:00 |
09:48:32.09 |
+31:36:59.5 |
HIP 48082 |
30.29 |
| 2026-05-13 12:00 |
09:48:30.78 |
+31:36:29.1 |
HIP 48082 |
30.75 |
| 2026-05-14 00:00 |
09:48:29.53 |
+31:35:58.3 |
HIP 48082 |
31.21 |
| 2026-05-14 12:00 |
09:48:28.36 |
+31:35:27.4 |
HIP 48292 |
31.46 |
| 2026-05-15 00:00 |
09:48:27.26 |
+31:34:56.1 |
HIP 48292 |
31.49 |
| 2026-05-15 12:00 |
09:48:26.23 |
+31:34:24.6 |
HIP 48292 |
31.51 |
| 2026-05-16 00:00 |
09:48:25.27 |
+31:33:52.9 |
HIP 48292 |
31.53 |
| 2026-05-16 12:00 |
09:48:24.38 |
+31:33:20.9 |
HIP 48292 |
31.54 |
| 2026-05-17 00:00 |
09:48:23.55 |
+31:32:48.6 |
HIP 48292 |
31.55 |
| 2026-05-17 12:00 |
09:48:22.80 |
+31:32:16.1 |
HIP 48292 |
31.55 |
| 2026-05-18 00:00 |
09:48:22.12 |
+31:31:43.4 |
HIP 48292 |
31.54 |
| 2026-05-18 12:00 |
09:48:21.51 |
+31:31:10.4 |
HIP 48292 |
31.54 |
| 2026-05-19 00:00 |
09:48:20.96 |
+31:30:37.2 |
HIP 48292 |
31.52 |
| 2026-05-19 12:00 |
09:48:20.49 |
+31:30:03.7 |
HIP 48212 |
31.39 |
| 2026-05-20 00:00 |
09:48:20.08 |
+31:29:30.0 |
HIP 48212 |
30.99 |
| 2026-05-20 12:00 |
09:48:19.74 |
+31:28:56.1 |
HIP 48212 |
30.59 |
| 2026-05-21 00:00 |
09:48:19.48 |
+31:28:22.0 |
HIP 48212 |
30.17 |
| 2026-05-21 12:00 |
09:48:19.27 |
+31:27:47.6 |
HIP 48212 |
29.75 |
| 2026-05-22 00:00 |
09:48:19.14 |
+31:27:13.0 |
HIP 48212 |
29.32 |
| 2026-05-22 12:00 |
09:48:19.07 |
+31:26:38.2 |
HIP 48212 |
28.89 |
| 2026-05-23 00:00 |
09:48:19.07 |
+31:26:03.2 |
HIP 48212 |
28.45 |
| 2026-05-23 12:00 |
09:48:19.14 |
+31:25:28.0 |
HIP 48212 |
28.00 |
| 2026-05-24 00:00 |
09:48:19.27 |
+31:24:52.6 |
HIP 48212 |
27.55 |
| 2026-05-24 12:00 |
09:48:19.47 |
+31:24:17.0 |
HIP 48212 |
27.08 |
| 2026-05-25 00:00 |
09:48:19.74 |
+31:23:41.2 |
HIP 48212 |
26.61 |
| 2026-05-25 12:00 |
09:48:20.07 |
+31:23:05.2 |
HIP 48212 |
26.14 |
| 2026-05-26 00:00 |
09:48:20.47 |
+31:22:29.0 |
HIP 48212 |
25.66 |
| 2026-05-26 12:00 |
09:48:20.93 |
+31:21:52.7 |
HIP 48212 |
25.17 |
| 2026-05-27 00:00 |
09:48:21.45 |
+31:21:16.1 |
HIP 48212 |
24.67 |
| 2026-05-27 12:00 |
09:48:22.05 |
+31:20:39.3 |
HIP 48212 |
24.17 |
| 2026-05-28 00:00 |
09:48:22.70 |
+31:20:02.4 |
HIP 48212 |
23.66 |
| 2026-05-28 12:00 |
09:48:23.42 |
+31:19:25.3 |
HIP 48212 |
23.14 |
| 2026-05-29 00:00 |
09:48:24.20 |
+31:18:48.1 |
HIP 48212 |
22.62 |
| 2026-05-29 12:00 |
09:48:25.05 |
+31:18:10.6 |
HIP 48212 |
22.09 |
| 2026-05-30 00:00 |
09:48:25.96 |
+31:17:33.0 |
HIP 48212 |
21.56 |
| 2026-05-30 12:00 |
09:48:26.93 |
+31:16:55.2 |
HIP 48212 |
21.02 |
| 2026-05-31 00:00 |
09:48:27.97 |
+31:16:17.3 |
HIP 48212 |
20.47 |
| 2026-05-31 12:00 |
09:48:29.06 |
+31:15:39.2 |
HIP 48212 |
19.92 |
| 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 |