C/2023 C2 (ATLAS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2023 C2 (ATLAS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2024-11-16T18:43:11.533440Z |
| Orbit solution date (soln_date, UTC) | 2026-03-21T13:42:21Z |
| Obs used | 1931 |
| NEO | - |
| M1 | 10.900 |
| K1 | 4.500 |
| PC | 0.030 |
| Discovery observation (MPC, UTC) | 2023-02-01T06:05:54.758400Z |
| Discovery magnitude (MPC) | 19.12 o |
| Discovery observatory (MPC) | W68 · ATLAS Chile, Rio Hurtado |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2025-03-14.0000000 |
| e | 0.99899777 |
| q (au) | 2.368470 |
| a (au) | 2363.190867 |
| i (deg) | 48.322061 |
| Ω (om, deg) | 301.004729 |
| ω (w, deg) | 357.444244 |
| M (ma, deg) | 0.001006 |
밝기
산란 + 전체 선형
$$ M_a = (10.561 + 2.905\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 10.561 |
| n | 2.905 |
| gf | 0.992 |
| gb | -0.668 |
| k | 0.885 |
| δ90 | 9.638 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) | 끝 (UTC) | a | b |
|---|---|---|---|
| 2023-02-01 | 2024-02-08 | +0.2191 | +0.133 |
| 2024-02-08 | 2024-04-08 | +2.8811 | -1.308 |
| 2024-04-08 | 2024-11-13 | +2.7043 | -1.406 |
| 2024-11-28 | 2025-10-02 | -1.0594 | +0.561 |
| 2025-10-02 | 2026-03-21 | -9.8774 | +6.153 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 00:33:39.35 | +50:20:44.9 | HIP 2602 | 10.53 |
| 2026-03-26 12:00 | 00:34:17.80 | +50:23:01.9 | HIP 2602 | 13.55 |
| 2026-03-27 00:00 | 00:34:56.24 | +50:25:19.7 | HIP 2602 | 18.47 |
| 2026-03-27 12:00 | 00:35:34.68 | +50:27:38.3 | HIP 2602 | 24.16 |
| 2026-03-28 00:00 | 00:36:13.10 | +50:29:57.6 | HIP 2921 | 24.30 |
| 2026-03-28 12:00 | 00:36:51.52 | +50:32:17.7 | HIP 2921 | 25.47 |
| 2026-03-29 00:00 | 00:37:29.94 | +50:34:38.5 | HIP 2921 | 28.18 |
| 2026-03-29 12:00 | 00:38:08.34 | +50:37:00.1 | HIP 3080 | 26.35 |
| 2026-03-30 00:00 | 00:38:46.74 | +50:39:22.3 | HIP 3080 | 22.50 |
| 2026-03-30 12:00 | 00:39:25.13 | +50:41:45.3 | HIP 3080 | 20.06 |
| 2026-03-31 00:00 | 00:40:03.50 | +50:44:09.0 | HIP 3217 | 17.07 |
| 2026-03-31 12:00 | 00:40:41.87 | +50:46:33.5 | HIP 3217 | 12.79 |
| 2026-04-01 00:00 | 00:41:20.23 | +50:48:58.6 | HIP 3217 | 10.99 |
| 2026-04-01 12:00 | 00:41:58.58 | +50:51:24.4 | HIP 3217 | 12.74 |
| 2026-04-02 00:00 | 00:42:36.92 | +50:53:50.9 | HIP 3217 | 16.98 |
| 2026-04-02 12:00 | 00:43:15.25 | +50:56:18.1 | HIP 3217 | 22.34 |
| 2026-04-03 00:00 | 00:43:53.57 | +50:58:46.0 | HIP 3217 | 28.17 |
| 2026-04-03 12:00 | 00:44:31.88 | +51:01:14.6 | HIP 3698 | 27.52 |
| 2026-04-04 00:00 | 00:45:10.17 | +51:03:43.8 | HIP 3698 | 21.21 |
| 2026-04-04 12:00 | 00:45:48.46 | +51:06:13.7 | HIP 3698 | 15.10 |
| 2026-04-05 00:00 | 00:46:26.73 | +51:08:44.3 | HIP 3698 | 9.56 |
| 2026-04-05 12:00 | 00:47:04.99 | +51:11:15.5 | HIP 3698 | 6.30 |
| 2026-04-06 00:00 | 00:47:43.23 | +51:13:47.4 | HIP 3703 | 8.05 |
| 2026-04-06 12:00 | 00:48:21.46 | +51:16:19.9 | HIP 3736 | 10.93 |
| 2026-04-07 00:00 | 00:48:59.68 | +51:18:53.0 | HIP 3736 | 12.27 |
| 2026-04-07 12:00 | 00:49:37.89 | +51:21:26.8 | HIP 3956 | 10.91 |
| 2026-04-08 00:00 | 00:50:16.08 | +51:24:01.3 | HIP 3956 | 4.95 |
| 2026-04-08 12:00 | 00:50:54.25 | +51:26:36.4 | HIP 3956 | 3.80 |
| 2026-04-09 00:00 | 00:51:32.41 | +51:29:12.1 | HIP 4023 | 5.09 |
| 2026-04-09 12:00 | 00:52:10.55 | +51:31:48.4 | HIP 4023 | 6.23 |
| 2026-04-10 00:00 | 00:52:48.68 | +51:34:25.3 | HIP 4023 | 11.64 |
| 2026-04-10 12:00 | 00:53:26.79 | +51:37:02.8 | HIP 4161 | 15.96 |
| 2026-04-11 00:00 | 00:54:04.88 | +51:39:41.0 | HIP 4161 | 15.69 |
| 2026-04-11 12:00 | 00:54:42.96 | +51:42:19.8 | HIP 4161 | 17.89 |
| 2026-04-12 00:00 | 00:55:21.02 | +51:44:59.1 | HIP 4161 | 21.84 |
| 2026-04-12 12:00 | 00:55:59.06 | +51:47:39.1 | HIP 4161 | 26.76 |
| 2026-04-13 00:00 | 00:56:37.08 | +51:50:19.6 | HIP 4523 | 21.60 |
| 2026-04-13 12:00 | 00:57:15.08 | +51:53:00.7 | HIP 4523 | 16.44 |
| 2026-04-14 00:00 | 00:57:53.06 | +51:55:42.4 | HIP 4523 | 12.51 |
| 2026-04-14 12:00 | 00:58:31.01 | +51:58:24.7 | HIP 4523 | 11.19 |
| 2026-04-15 00:00 | 00:59:08.95 | +52:01:07.5 | HIP 4523 | 13.29 |
| 2026-04-15 12:00 | 00:59:46.87 | +52:03:51.0 | HIP 4766 | 13.45 |
| 2026-04-16 00:00 | 01:00:24.76 | +52:06:34.9 | HIP 4766 | 8.28 |