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 |
-0.501 |
| 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) |
| 2026-06-01 00:00 |
07:10:33.88 |
+30:51:06.3 |
HIP 34733 |
25.65 |
| 2026-06-01 12:00 |
07:10:38.94 |
+30:51:01.2 |
HIP 34733 |
25.09 |
| 2026-06-02 00:00 |
07:10:44.04 |
+30:50:56.0 |
HIP 34733 |
24.56 |
| 2026-06-02 12:00 |
07:10:49.17 |
+30:50:51.0 |
HIP 34733 |
24.07 |
| 2026-06-03 00:00 |
07:10:54.34 |
+30:50:45.9 |
HIP 34733 |
23.62 |
| 2026-06-03 12:00 |
07:10:59.54 |
+30:50:40.9 |
HIP 34733 |
23.21 |
| 2026-06-04 00:00 |
07:11:04.77 |
+30:50:36.0 |
HIP 34733 |
22.85 |
| 2026-06-04 12:00 |
07:11:10.03 |
+30:50:31.1 |
HIP 34733 |
22.53 |
| 2026-06-05 00:00 |
07:11:15.32 |
+30:50:26.2 |
HIP 34733 |
22.28 |
| 2026-06-05 12:00 |
07:11:20.65 |
+30:50:21.3 |
HIP 34733 |
22.07 |
| 2026-06-06 00:00 |
07:11:26.00 |
+30:50:16.5 |
HIP 34733 |
21.93 |
| 2026-06-06 12:00 |
07:11:31.39 |
+30:50:11.8 |
HIP 34733 |
21.85 |
| 2026-06-07 00:00 |
07:11:36.80 |
+30:50:07.0 |
HIP 34733 |
21.83 |
| 2026-06-07 12:00 |
07:11:42.24 |
+30:50:02.4 |
HIP 34733 |
21.87 |
| 2026-06-08 00:00 |
07:11:47.72 |
+30:49:57.7 |
HIP 34733 |
21.98 |
| 2026-06-08 12:00 |
07:11:53.22 |
+30:49:53.1 |
HIP 34733 |
22.15 |
| 2026-06-09 00:00 |
07:11:58.74 |
+30:49:48.6 |
HIP 34733 |
22.39 |
| 2026-06-09 12:00 |
07:12:04.30 |
+30:49:44.1 |
HIP 34733 |
22.69 |
| 2026-06-10 00:00 |
07:12:09.88 |
+30:49:39.7 |
HIP 34883 |
22.87 |
| 2026-06-10 12:00 |
07:12:15.49 |
+30:49:35.3 |
HIP 34883 |
22.33 |
| 2026-06-11 00:00 |
07:12:21.13 |
+30:49:30.9 |
HIP 34883 |
21.83 |
| 2026-06-11 12:00 |
07:12:26.79 |
+30:49:26.6 |
HIP 34883 |
21.40 |
| 2026-06-12 00:00 |
07:12:32.48 |
+30:49:22.4 |
HIP 34883 |
21.02 |
| 2026-06-12 12:00 |
07:12:38.19 |
+30:49:18.2 |
HIP 34883 |
20.71 |
| 2026-06-13 00:00 |
07:12:43.93 |
+30:49:14.0 |
HIP 34883 |
20.46 |
| 2026-06-13 12:00 |
07:12:49.69 |
+30:49:09.9 |
HIP 34883 |
20.28 |
| 2026-06-14 00:00 |
07:12:55.47 |
+30:49:05.9 |
HIP 34883 |
20.18 |
| 2026-06-14 12:00 |
07:13:01.28 |
+30:49:01.9 |
HIP 34883 |
20.15 |
| 2026-06-15 00:00 |
07:13:07.11 |
+30:48:58.0 |
HIP 34883 |
20.19 |
| 2026-06-15 12:00 |
07:13:12.96 |
+30:48:54.2 |
HIP 34883 |
20.32 |
| 2026-06-16 00:00 |
07:13:18.83 |
+30:48:50.4 |
HIP 34883 |
20.51 |
| 2026-06-16 12:00 |
07:13:24.73 |
+30:48:46.6 |
HIP 34883 |
20.79 |
| 2026-06-17 00:00 |
07:13:30.64 |
+30:48:42.9 |
HIP 34883 |
21.13 |
| 2026-06-17 12:00 |
07:13:36.58 |
+30:48:39.3 |
HIP 34883 |
21.55 |
| 2026-06-18 00:00 |
07:13:42.53 |
+30:48:35.8 |
HIP 34883 |
22.03 |
| 2026-06-18 12:00 |
07:13:48.50 |
+30:48:32.3 |
HIP 34883 |
22.57 |
| 2026-06-19 00:00 |
07:13:54.49 |
+30:48:28.9 |
HIP 34883 |
23.18 |
| 2026-06-19 12:00 |
07:14:00.50 |
+30:48:25.5 |
HIP 34883 |
23.84 |
| 2026-06-20 00:00 |
07:14:06.53 |
+30:48:22.2 |
HIP 34883 |
24.54 |
| 2026-06-20 12:00 |
07:14:12.57 |
+30:48:19.0 |
HIP 34883 |
25.30 |
| 2026-06-21 00:00 |
07:14:18.63 |
+30:48:15.9 |
HIP 34883 |
26.10 |
| 2026-06-21 12:00 |
07:14:24.71 |
+30:48:12.8 |
HIP 35193 |
26.18 |
| 2026-06-22 00:00 |
07:14:30.80 |
+30:48:09.8 |
HIP 35193 |
24.90 |