메타데이터
| 항목 |
값 |
| 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 궤도요소
| 항목 |
값 |
| 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 |
밝기
산란 + 전체 선형
$$
M_a = (17.042 + 3.130\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.042 |
| n |
3.130 |
| gf |
0.986 |
| gb |
-0.629 |
| k |
0.891 |
| δ90 |
9.740 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
09:56:15.31 |
+29:55:20.1 |
HIP 48713 |
8.15 |
| 2026-07-29 12:00 |
09:56:21.28 |
+29:54:41.8 |
HIP 48713 |
7.88 |
| 2026-07-30 00:00 |
09:56:27.26 |
+29:54:03.6 |
HIP 48713 |
7.86 |
| 2026-07-30 12:00 |
09:56:33.26 |
+29:53:25.6 |
HIP 48713 |
8.12 |
| 2026-07-31 00:00 |
09:56:39.28 |
+29:52:47.7 |
HIP 48713 |
8.62 |
| 2026-07-31 12:00 |
09:56:45.31 |
+29:52:10.0 |
HIP 48713 |
9.32 |
| 2026-08-01 00:00 |
09:56:51.36 |
+29:51:32.4 |
HIP 48713 |
10.19 |
| 2026-08-01 12:00 |
09:56:57.42 |
+29:50:55.0 |
HIP 48713 |
11.18 |
| 2026-08-02 00:00 |
09:57:03.50 |
+29:50:17.8 |
HIP 48713 |
12.27 |
| 2026-08-02 12:00 |
09:57:09.59 |
+29:49:40.6 |
HIP 48713 |
13.44 |
| 2026-08-03 00:00 |
09:57:15.70 |
+29:49:03.7 |
HIP 48713 |
14.66 |
| 2026-08-03 12:00 |
09:57:21.82 |
+29:48:26.9 |
HIP 48713 |
15.92 |
| 2026-08-04 00:00 |
09:57:27.96 |
+29:47:50.3 |
HIP 48713 |
17.22 |
| 2026-08-04 12:00 |
09:57:34.10 |
+29:47:13.8 |
HIP 48713 |
18.55 |
| 2026-08-05 00:00 |
09:57:40.26 |
+29:46:37.5 |
HIP 48898 |
18.10 |
| 2026-08-05 12:00 |
09:57:46.43 |
+29:46:01.3 |
HIP 48898 |
16.84 |
| 2026-08-06 00:00 |
09:57:52.62 |
+29:45:25.4 |
HIP 48898 |
15.61 |
| 2026-08-06 12:00 |
09:57:58.81 |
+29:44:49.6 |
HIP 48898 |
14.43 |
| 2026-08-07 00:00 |
09:58:05.02 |
+29:44:14.0 |
HIP 48898 |
13.30 |
| 2026-08-07 12:00 |
09:58:11.23 |
+29:43:38.5 |
HIP 48898 |
12.26 |
| 2026-08-08 00:00 |
09:58:17.46 |
+29:43:03.3 |
HIP 48898 |
11.31 |
| 2026-08-08 12:00 |
09:58:23.70 |
+29:42:28.2 |
HIP 48898 |
10.49 |
| 2026-08-09 00:00 |
09:58:29.94 |
+29:41:53.3 |
HIP 48898 |
9.82 |
| 2026-08-09 12:00 |
09:58:36.19 |
+29:41:18.6 |
HIP 48898 |
9.34 |
| 2026-08-10 00:00 |
09:58:42.46 |
+29:40:44.1 |
HIP 48898 |
9.09 |
| 2026-08-10 12:00 |
09:58:48.73 |
+29:40:09.8 |
HIP 48898 |
9.08 |
| 2026-08-11 00:00 |
09:58:55.00 |
+29:39:35.6 |
HIP 48982 |
9.01 |
| 2026-08-11 12:00 |
09:59:01.29 |
+29:39:01.7 |
HIP 48982 |
7.61 |
| 2026-08-12 00:00 |
09:59:07.58 |
+29:38:28.0 |
HIP 48982 |
6.24 |
| 2026-08-12 12:00 |
09:59:13.87 |
+29:37:54.5 |
HIP 48982 |
4.94 |
| 2026-08-13 00:00 |
09:59:20.18 |
+29:37:21.1 |
HIP 48982 |
3.76 |
| 2026-08-13 12:00 |
09:59:26.48 |
+29:36:48.0 |
HIP 48982 |
2.87 |
| 2026-08-14 00:00 |
09:59:32.80 |
+29:36:15.1 |
HIP 48982 |
2.58 |
| 2026-08-14 12:00 |
09:59:39.11 |
+29:35:42.4 |
HIP 48982 |
3.08 |
| 2026-08-15 00:00 |
09:59:45.43 |
+29:35:09.9 |
HIP 48982 |
4.07 |
| 2026-08-15 12:00 |
09:59:51.75 |
+29:34:37.6 |
HIP 48982 |
5.30 |
| 2026-08-16 00:00 |
09:59:58.08 |
+29:34:05.6 |
HIP 48982 |
6.62 |
| 2026-08-16 12:00 |
10:00:04.41 |
+29:33:33.8 |
HIP 48982 |
8.00 |
| 2026-08-17 00:00 |
10:00:10.74 |
+29:33:02.1 |
HIP 48982 |
9.40 |
| 2026-08-17 12:00 |
10:00:17.07 |
+29:32:30.8 |
HIP 48982 |
10.82 |
| 2026-08-18 00:00 |
10:00:23.40 |
+29:31:59.6 |
HIP 48982 |
12.25 |
| 2026-08-18 12:00 |
10:00:29.73 |
+29:31:28.7 |
HIP 49109 |
11.96 |
| 2026-08-19 00:00 |
10:00:36.06 |
+29:30:58.0 |
HIP 49109 |
10.84 |