C/2020 A3 (ATLAS)
메타데이터
| 항목 |
값 |
| Designation |
C/2020 A3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-28T20:34:35.627520Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:12:32Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
11.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-01-07T14:18:44.640000Z |
| Discovery magnitude (MPC) |
18.92 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-10-25.0000000 |
| e |
0.99890265 |
| q (au) |
5.766807 |
| a (au) |
5255.225488 |
| i (deg) |
146.700275 |
| Ω (om, deg) |
120.792469 |
| ω (w, deg) |
268.410013 |
| M (ma, deg) |
0.000306 |
밝기
산란 + 전체 선형
$$
M_a = (2.943 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.943 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-02-03 00:00 |
07:18:22.34 |
+30:42:46.3 |
HIP 35372 |
6.75 |
| 2026-02-03 12:00 |
07:18:12.68 |
+30:43:08.5 |
HIP 35372 |
6.96 |
| 2026-02-04 00:00 |
07:18:03.06 |
+30:43:30.4 |
HIP 35372 |
7.77 |
| 2026-02-04 12:00 |
07:17:53.48 |
+30:43:52.1 |
HIP 35372 |
8.99 |
| 2026-02-05 00:00 |
07:17:43.94 |
+30:44:13.5 |
HIP 35372 |
10.49 |
| 2026-02-05 12:00 |
07:17:34.45 |
+30:44:34.6 |
HIP 35372 |
12.15 |
| 2026-02-06 00:00 |
07:17:25.00 |
+30:44:55.5 |
HIP 35193 |
13.49 |
| 2026-02-06 12:00 |
07:17:15.60 |
+30:45:16.2 |
HIP 35193 |
11.59 |
| 2026-02-07 00:00 |
07:17:06.25 |
+30:45:36.6 |
HIP 35193 |
9.77 |
| 2026-02-07 12:00 |
07:16:56.94 |
+30:45:56.7 |
HIP 35193 |
8.06 |
| 2026-02-08 00:00 |
07:16:47.68 |
+30:46:16.5 |
HIP 35193 |
6.54 |
| 2026-02-08 12:00 |
07:16:38.46 |
+30:46:36.1 |
HIP 35193 |
5.37 |
| 2026-02-09 00:00 |
07:16:29.30 |
+30:46:55.5 |
HIP 35193 |
4.78 |
| 2026-02-09 12:00 |
07:16:20.19 |
+30:47:14.6 |
HIP 35193 |
4.98 |
| 2026-02-10 00:00 |
07:16:11.12 |
+30:47:33.4 |
HIP 35193 |
5.87 |
| 2026-02-10 12:00 |
07:16:02.11 |
+30:47:52.0 |
HIP 35193 |
7.20 |
| 2026-02-11 00:00 |
07:15:53.15 |
+30:48:10.3 |
HIP 35193 |
8.75 |
| 2026-02-11 12:00 |
07:15:44.24 |
+30:48:28.3 |
HIP 35193 |
10.43 |
| 2026-02-12 00:00 |
07:15:35.38 |
+30:48:46.2 |
HIP 35193 |
12.17 |
| 2026-02-12 12:00 |
07:15:26.58 |
+30:49:03.7 |
HIP 35193 |
13.95 |
| 2026-02-13 00:00 |
07:15:17.83 |
+30:49:21.0 |
HIP 35193 |
15.75 |
| 2026-02-13 12:00 |
07:15:09.14 |
+30:49:38.0 |
HIP 35193 |
17.56 |
| 2026-02-14 00:00 |
07:15:00.50 |
+30:49:54.8 |
HIP 35193 |
19.37 |
| 2026-02-14 12:00 |
07:14:51.92 |
+30:50:11.4 |
HIP 35193 |
21.18 |
| 2026-02-15 00:00 |
07:14:43.39 |
+30:50:27.7 |
HIP 35193 |
22.98 |
| 2026-02-15 12:00 |
07:14:34.92 |
+30:50:43.7 |
HIP 35193 |
24.78 |
| 2026-02-16 00:00 |
07:14:26.51 |
+30:50:59.5 |
HIP 34883 |
25.11 |
| 2026-02-16 12:00 |
07:14:18.16 |
+30:51:15.0 |
HIP 34883 |
23.71 |
| 2026-02-17 00:00 |
07:14:09.87 |
+30:51:30.3 |
HIP 34883 |
22.38 |
| 2026-02-17 12:00 |
07:14:01.64 |
+30:51:45.4 |
HIP 34883 |
21.14 |
| 2026-02-18 00:00 |
07:13:53.46 |
+30:52:00.2 |
HIP 34883 |
19.98 |
| 2026-02-18 12:00 |
07:13:45.35 |
+30:52:14.7 |
HIP 34883 |
18.93 |
| 2026-02-19 00:00 |
07:13:37.30 |
+30:52:29.0 |
HIP 34883 |
18.00 |
| 2026-02-19 12:00 |
07:13:29.31 |
+30:52:43.1 |
HIP 34883 |
17.20 |
| 2026-02-20 00:00 |
07:13:21.39 |
+30:52:56.9 |
HIP 34883 |
16.56 |
| 2026-02-20 12:00 |
07:13:13.53 |
+30:53:10.5 |
HIP 34883 |
16.07 |
| 2026-02-21 00:00 |
07:13:05.73 |
+30:53:23.8 |
HIP 34883 |
15.76 |
| 2026-02-21 12:00 |
07:12:57.99 |
+30:53:36.9 |
HIP 34883 |
15.63 |
| 2026-02-22 00:00 |
07:12:50.32 |
+30:53:49.7 |
HIP 34883 |
15.67 |
| 2026-02-22 12:00 |
07:12:42.72 |
+30:54:02.4 |
HIP 34883 |
15.89 |
| 2026-02-23 00:00 |
07:12:35.18 |
+30:54:14.7 |
HIP 34883 |
16.28 |
| 2026-02-23 12:00 |
07:12:27.70 |
+30:54:26.9 |
HIP 34883 |
16.80 |
| 2026-02-24 00:00 |
07:12:20.29 |
+30:54:38.8 |
HIP 34883 |
17.46 |