103P/Hartley 2
메타데이터
| 항목 | 값 |
|---|---|
| Designation | 103P/Hartley 2 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-04-20T10:59:29.739840Z |
| Orbit solution date (soln_date, UTC) | 2025-05-01T10:45:38Z |
| Obs used | 8768 |
| NEO | Yes |
| M1 | 16.000 |
| K1 | 4.500 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2015-05-10.0000000 |
| e | 0.69359786 |
| q (au) | 1.064947 |
| a (au) | 3.475652 |
| i (deg) | 13.599468 |
| Ω (om, deg) | 219.742174 |
| ω (w, deg) | 181.321844 |
| M (ma, deg) | 251.782173 |
밝기
산란 + 전체 선형
$$ M_a = (15.100 + 3.424\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 15.100 |
| n | 3.424 |
| gf | 1.000 |
| gb | -0.827 |
| k | 0.954 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) | 끝 (UTC) | a | b |
|---|---|---|---|
| 2023-04-17 | 2024-02-18 | +8.1437 | -2.155 |
| 2024-02-18 | 2025-04-28 | -2.9095 | +0.580 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 13:31:56.32 | -11:43:12.5 | HIP 66018 | 27.91 |
| 2026-06-01 12:00 | 13:31:46.40 | -11:41:45.4 | HIP 66018 | 26.77 |
| 2026-06-02 00:00 | 13:31:36.65 | -11:40:19.3 | HIP 66018 | 25.88 |
| 2026-06-02 12:00 | 13:31:27.07 | -11:38:54.0 | HIP 65849 | 24.36 |
| 2026-06-03 00:00 | 13:31:17.64 | -11:37:29.7 | HIP 65849 | 21.70 |
| 2026-06-03 12:00 | 13:31:08.37 | -11:36:06.3 | HIP 65849 | 19.09 |
| 2026-06-04 00:00 | 13:30:59.27 | -11:34:43.8 | HIP 65849 | 16.54 |
| 2026-06-04 12:00 | 13:30:50.34 | -11:33:22.3 | HIP 65849 | 14.06 |
| 2026-06-05 00:00 | 13:30:41.56 | -11:32:01.6 | HIP 65849 | 11.66 |
| 2026-06-05 12:00 | 13:30:32.95 | -11:30:41.9 | HIP 65849 | 9.38 |
| 2026-06-06 00:00 | 13:30:24.51 | -11:29:23.2 | HIP 65849 | 7.27 |
| 2026-06-06 12:00 | 13:30:16.23 | -11:28:05.4 | HIP 65849 | 5.50 |
| 2026-06-07 00:00 | 13:30:08.12 | -11:26:48.6 | HIP 65849 | 4.39 |
| 2026-06-07 12:00 | 13:30:00.18 | -11:25:32.7 | HIP 65849 | 4.41 |
| 2026-06-08 00:00 | 13:29:52.40 | -11:24:17.9 | HIP 65849 | 5.49 |
| 2026-06-08 12:00 | 13:29:44.79 | -11:23:03.9 | HIP 65849 | 7.13 |
| 2026-06-09 00:00 | 13:29:37.35 | -11:21:51.0 | HIP 65849 | 9.00 |
| 2026-06-09 12:00 | 13:29:30.08 | -11:20:39.1 | HIP 65849 | 10.95 |
| 2026-06-10 00:00 | 13:29:22.98 | -11:19:28.1 | HIP 65849 | 12.92 |
| 2026-06-10 12:00 | 13:29:16.04 | -11:18:18.1 | HIP 65849 | 14.89 |
| 2026-06-11 00:00 | 13:29:09.28 | -11:17:09.2 | HIP 65849 | 16.84 |
| 2026-06-11 12:00 | 13:29:02.68 | -11:16:01.2 | HIP 65849 | 18.77 |
| 2026-06-12 00:00 | 13:28:56.26 | -11:14:54.3 | HIP 65849 | 20.66 |
| 2026-06-12 12:00 | 13:28:50.01 | -11:13:48.3 | HIP 65849 | 22.52 |
| 2026-06-13 00:00 | 13:28:43.93 | -11:12:43.4 | HIP 65849 | 24.34 |
| 2026-06-13 12:00 | 13:28:38.01 | -11:11:39.5 | HIP 65849 | 26.12 |
| 2026-06-14 00:00 | 13:28:32.28 | -11:10:36.6 | HIP 65849 | 27.86 |
| 2026-06-14 12:00 | 13:28:26.71 | -11:09:34.8 | HIP 65849 | 29.56 |
| 2026-06-15 00:00 | 13:28:21.31 | -11:08:34.0 | HIP 65849 | 31.22 |
| 2026-06-15 12:00 | 13:28:16.09 | -11:07:34.2 | HIP 65821 | 31.65 |
| 2026-06-16 00:00 | 13:28:11.04 | -11:06:35.5 | HIP 65821 | 31.69 |
| 2026-06-16 12:00 | 13:28:06.17 | -11:05:37.8 | HIP 65821 | 31.79 |
| 2026-06-17 00:00 | 13:28:01.46 | -11:04:41.1 | HIP 65821 | 31.94 |
| 2026-06-17 12:00 | 13:27:56.93 | -11:03:45.5 | HIP 65821 | 32.15 |
| 2026-06-18 00:00 | 13:27:52.57 | -11:02:51.0 | HIP 65821 | 32.39 |
| 2026-06-18 12:00 | 13:27:48.38 | -11:01:57.4 | HIP 65821 | 32.67 |
| 2026-06-19 00:00 | 13:27:44.36 | -11:01:05.0 | HIP 65821 | 32.98 |
| 2026-06-19 12:00 | 13:27:40.52 | -11:00:13.5 | HIP 65821 | 33.31 |
| 2026-06-20 00:00 | 13:27:36.85 | -10:59:23.2 | HIP 65821 | 33.65 |
| 2026-06-20 12:00 | 13:27:33.35 | -10:58:33.8 | HIP 65821 | 34.01 |
| 2026-06-21 00:00 | 13:27:30.02 | -10:57:45.6 | HIP 65821 | 34.38 |
| 2026-06-21 12:00 | 13:27:26.87 | -10:56:58.3 | HIP 65821 | 34.75 |
| 2026-06-22 00:00 | 13:27:23.88 | -10:56:12.1 | HIP 65821 | 35.11 |