C/1963 A1 (Ikeya)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/1963 A1 (Ikeya) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1963-03-21T11:23:55.291200Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:16Z |
| Obs used | 33 |
| NEO | - |
| M1 | - |
| K1 | - |
| PC | 0.030 |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 1963-04-26.0000000 |
| e | 0.99338425 |
| q (au) | 0.632140 |
| a (au) | 95.550699 |
| i (deg) | 160.648837 |
| Ω (om, deg) | 53.219499 |
| ω (w, deg) | 336.302578 |
| M (ma, deg) | 0.037488 |
밝기
산란 + 전체 선형
$$ M_a = (6.550 + 5.309\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 6.550 |
| n | 5.309 |
| gf | 0.800 |
| gb | -1.000 |
| k | 0.883 |
| δ90 | 5.499 |
| 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 |
|---|---|---|---|
| 1963-01-14 | 1963-01-31 | +4.5011 | -0.327 |
| 1963-01-31 | 1963-03-21 | +3.5661 | +0.519 |
| 1963-03-21 | 1963-10-12 | -1.6935 | +2.278 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 17:35:04.48 | -13:26:15.9 | HIP 86049 | 12.02 |
| 2026-02-03 12:00 | 17:35:05.46 | -13:26:13.7 | HIP 86049 | 12.05 |
| 2026-02-04 00:00 | 17:35:06.43 | -13:26:11.4 | HIP 86049 | 12.08 |
| 2026-02-04 12:00 | 17:35:07.39 | -13:26:09.1 | HIP 86049 | 12.11 |
| 2026-02-05 00:00 | 17:35:08.34 | -13:26:06.8 | HIP 86049 | 12.15 |
| 2026-02-05 12:00 | 17:35:09.28 | -13:26:04.5 | HIP 86049 | 12.20 |
| 2026-02-06 00:00 | 17:35:10.20 | -13:26:02.1 | HIP 86049 | 12.25 |
| 2026-02-06 12:00 | 17:35:11.12 | -13:25:59.8 | HIP 86049 | 12.30 |
| 2026-02-07 00:00 | 17:35:12.03 | -13:25:57.3 | HIP 86049 | 12.36 |
| 2026-02-07 12:00 | 17:35:12.92 | -13:25:54.9 | HIP 86049 | 12.42 |
| 2026-02-08 00:00 | 17:35:13.81 | -13:25:52.4 | HIP 86049 | 12.49 |
| 2026-02-08 12:00 | 17:35:14.68 | -13:25:49.9 | HIP 86049 | 12.56 |
| 2026-02-09 00:00 | 17:35:15.55 | -13:25:47.4 | HIP 86049 | 12.63 |
| 2026-02-09 12:00 | 17:35:16.40 | -13:25:44.9 | HIP 86049 | 12.71 |
| 2026-02-10 00:00 | 17:35:17.24 | -13:25:42.3 | HIP 86049 | 12.78 |
| 2026-02-10 12:00 | 17:35:18.07 | -13:25:39.7 | HIP 86049 | 12.87 |
| 2026-02-11 00:00 | 17:35:18.89 | -13:25:37.1 | HIP 86049 | 12.95 |
| 2026-02-11 12:00 | 17:35:19.70 | -13:25:34.4 | HIP 86049 | 13.04 |
| 2026-02-12 00:00 | 17:35:20.50 | -13:25:31.7 | HIP 86049 | 13.13 |
| 2026-02-12 12:00 | 17:35:21.28 | -13:25:29.0 | HIP 86049 | 13.22 |
| 2026-02-13 00:00 | 17:35:22.06 | -13:25:26.3 | HIP 86049 | 13.31 |
| 2026-02-13 12:00 | 17:35:22.82 | -13:25:23.5 | HIP 86049 | 13.40 |
| 2026-02-14 00:00 | 17:35:23.57 | -13:25:20.8 | HIP 86049 | 13.50 |
| 2026-02-14 12:00 | 17:35:24.31 | -13:25:18.0 | HIP 86049 | 13.60 |
| 2026-02-15 00:00 | 17:35:25.04 | -13:25:15.1 | HIP 86049 | 13.70 |
| 2026-02-15 12:00 | 17:35:25.76 | -13:25:12.3 | HIP 86049 | 13.80 |
| 2026-02-16 00:00 | 17:35:26.47 | -13:25:09.4 | HIP 86049 | 13.90 |
| 2026-02-16 12:00 | 17:35:27.16 | -13:25:06.5 | HIP 86049 | 14.00 |
| 2026-02-17 00:00 | 17:35:27.84 | -13:25:03.6 | HIP 86049 | 14.10 |
| 2026-02-17 12:00 | 17:35:28.51 | -13:25:00.6 | HIP 86049 | 14.21 |
| 2026-02-18 00:00 | 17:35:29.17 | -13:24:57.7 | HIP 86049 | 14.31 |
| 2026-02-18 12:00 | 17:35:29.81 | -13:24:54.7 | HIP 86049 | 14.42 |
| 2026-02-19 00:00 | 17:35:30.45 | -13:24:51.7 | HIP 86049 | 14.52 |
| 2026-02-19 12:00 | 17:35:31.07 | -13:24:48.6 | HIP 86049 | 14.63 |
| 2026-02-20 00:00 | 17:35:31.68 | -13:24:45.6 | HIP 86049 | 14.73 |
| 2026-02-20 12:00 | 17:35:32.28 | -13:24:42.5 | HIP 86049 | 14.84 |
| 2026-02-21 00:00 | 17:35:32.86 | -13:24:39.4 | HIP 86049 | 14.94 |
| 2026-02-21 12:00 | 17:35:33.43 | -13:24:36.3 | HIP 86049 | 15.05 |
| 2026-02-22 00:00 | 17:35:33.99 | -13:24:33.1 | HIP 86049 | 15.15 |
| 2026-02-22 12:00 | 17:35:34.54 | -13:24:30.0 | HIP 86049 | 15.26 |
| 2026-02-23 00:00 | 17:35:35.08 | -13:24:26.8 | HIP 86049 | 15.36 |
| 2026-02-23 12:00 | 17:35:35.60 | -13:24:23.6 | HIP 86049 | 15.47 |
| 2026-02-24 00:00 | 17:35:36.11 | -13:24:20.4 | HIP 86049 | 15.57 |