C/2023 A2 (SWAN)
메타데이터
| 항목 |
값 |
| Designation |
C/2023 A2 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-20T09:20:12.071040Z |
| Orbit solution date (soln_date, UTC) |
2024-10-11T09:32:29Z |
| Obs used |
159 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
20.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-01-06T00:00:00Z |
| Discovery magnitude (MPC) |
- |
| Discovery observatory (MPC) |
249 · SOHO |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-03-06.0000000 |
| e |
0.99829133 |
| q (au) |
0.947460 |
| a (au) |
554.501104 |
| i (deg) |
94.708355 |
| Ω (om, deg) |
94.471088 |
| ω (w, deg) |
142.583308 |
| M (ma, deg) |
0.003367 |
밝기
산란 + 전체 선형
$$
M_a = (14.826 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.826 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.840 |
| 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 |
06:15:12.81 |
-52:02:00.8 |
HIP 29547 |
15.74 |
| 2026-02-03 12:00 |
06:14:59.24 |
-51:59:49.2 |
HIP 29547 |
13.28 |
| 2026-02-04 00:00 |
06:14:45.82 |
-51:57:36.6 |
HIP 29547 |
11.12 |
| 2026-02-04 12:00 |
06:14:32.53 |
-51:55:23.0 |
HIP 29547 |
9.47 |
| 2026-02-05 00:00 |
06:14:19.38 |
-51:53:08.3 |
HIP 29547 |
8.63 |
| 2026-02-05 12:00 |
06:14:06.37 |
-51:50:52.7 |
HIP 29547 |
8.83 |
| 2026-02-06 00:00 |
06:13:53.51 |
-51:48:36.0 |
HIP 29561 |
8.74 |
| 2026-02-06 12:00 |
06:13:40.78 |
-51:46:18.3 |
HIP 29561 |
6.26 |
| 2026-02-07 00:00 |
06:13:28.20 |
-51:43:59.7 |
HIP 29561 |
4.47 |
| 2026-02-07 12:00 |
06:13:15.75 |
-51:41:40.1 |
HIP 29561 |
4.35 |
| 2026-02-08 00:00 |
06:13:03.46 |
-51:39:19.6 |
HIP 29561 |
5.98 |
| 2026-02-08 12:00 |
06:12:51.30 |
-51:36:58.1 |
HIP 29561 |
8.41 |
| 2026-02-09 00:00 |
06:12:39.30 |
-51:34:35.7 |
HIP 29561 |
11.12 |
| 2026-02-09 12:00 |
06:12:27.44 |
-51:32:12.4 |
HIP 29561 |
13.95 |
| 2026-02-10 00:00 |
06:12:15.72 |
-51:29:48.2 |
HIP 29561 |
16.84 |
| 2026-02-10 12:00 |
06:12:04.15 |
-51:27:23.1 |
HIP 29247 |
19.70 |
| 2026-02-11 00:00 |
06:11:52.74 |
-51:24:57.2 |
HIP 29247 |
17.70 |
| 2026-02-11 12:00 |
06:11:41.46 |
-51:22:30.4 |
HIP 29247 |
16.05 |
| 2026-02-12 00:00 |
06:11:30.34 |
-51:20:02.7 |
HIP 29247 |
14.86 |
| 2026-02-12 12:00 |
06:11:19.37 |
-51:17:34.3 |
HIP 29247 |
14.24 |
| 2026-02-13 00:00 |
06:11:08.55 |
-51:15:05.0 |
HIP 29247 |
14.27 |
| 2026-02-13 12:00 |
06:10:57.88 |
-51:12:34.9 |
HIP 29247 |
14.94 |
| 2026-02-14 00:00 |
06:10:47.36 |
-51:10:04.1 |
HIP 29247 |
16.17 |
| 2026-02-14 12:00 |
06:10:36.99 |
-51:07:32.4 |
HIP 29247 |
17.84 |
| 2026-02-15 00:00 |
06:10:26.77 |
-51:05:00.1 |
HIP 29247 |
19.85 |
| 2026-02-15 12:00 |
06:10:16.71 |
-51:02:27.0 |
HIP 29093 |
19.70 |
| 2026-02-16 00:00 |
06:10:06.80 |
-50:59:53.1 |
HIP 29093 |
17.95 |
| 2026-02-16 12:00 |
06:09:57.04 |
-50:57:18.6 |
HIP 29093 |
16.58 |
| 2026-02-17 00:00 |
06:09:47.44 |
-50:54:43.3 |
HIP 29093 |
15.69 |
| 2026-02-17 12:00 |
06:09:37.99 |
-50:52:07.4 |
HIP 29144 |
13.71 |
| 2026-02-18 00:00 |
06:09:28.69 |
-50:49:30.8 |
HIP 29144 |
10.72 |
| 2026-02-18 12:00 |
06:09:19.55 |
-50:46:53.5 |
HIP 29144 |
7.74 |
| 2026-02-19 00:00 |
06:09:10.57 |
-50:44:15.6 |
HIP 29144 |
4.78 |
| 2026-02-19 12:00 |
06:09:01.74 |
-50:41:37.1 |
HIP 29144 |
1.91 |
| 2026-02-20 00:00 |
06:08:53.06 |
-50:38:58.0 |
HIP 29144 |
1.55 |
| 2026-02-20 12:00 |
06:08:44.55 |
-50:36:18.3 |
HIP 29144 |
4.36 |
| 2026-02-21 00:00 |
06:08:36.18 |
-50:33:38.0 |
HIP 29144 |
7.31 |
| 2026-02-21 12:00 |
06:08:27.97 |
-50:30:57.2 |
HIP 29144 |
10.28 |
| 2026-02-22 00:00 |
06:08:19.92 |
-50:28:15.8 |
HIP 29144 |
13.25 |
| 2026-02-22 12:00 |
06:08:12.03 |
-50:25:33.9 |
HIP 29144 |
16.23 |
| 2026-02-23 00:00 |
06:08:04.28 |
-50:22:51.5 |
HIP 29144 |
19.20 |
| 2026-02-23 12:00 |
06:07:56.70 |
-50:20:08.5 |
HIP 29144 |
22.17 |
| 2026-02-24 00:00 |
06:07:49.27 |
-50:17:25.1 |
HIP 29144 |
25.15 |