240P/NEAT
메타데이터
| 항목 | 값 |
|---|---|
| Designation | 240P/NEAT |
| Type | P |
| Perihelion (tp_cal, UTC) | 2025-12-19T20:50:38.365440Z |
| Orbit solution date (soln_date, UTC) | 2026-05-28T12:52:39Z |
| Obs used | 4114 |
| NEO | - |
| M1 | 11.700 |
| K1 | 7.250 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2024-07-15.0000000 |
| e | 0.45033402 |
| q (au) | 2.122513 |
| a (au) | 3.861460 |
| i (deg) | 23.536972 |
| Ω (om, deg) | 74.914408 |
| ω (w, deg) | 352.027029 |
| M (ma, deg) | 292.084457 |
밝기
산란 + 전체 선형
$$ M_a = (13.123 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 13.123 |
| n | 2.000 |
| gf | 1.000 |
| gb | -0.500 |
| k | 0.800 |
| δ90 | 2.964 |
| 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 |
|---|---|---|---|
| 2024-06-13 | 2025-07-02 | +17.2730 | -7.993 |
| 2025-07-02 | 2025-12-19 | -7.8090 | +1.764 |
| 2025-12-19 | 2026-05-26 | +15.3323 | -5.270 |
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 | 07:18:19.33 | +35:44:24.6 | HIP 35282 | 19.57 |
| 2026-06-01 12:00 | 07:19:27.68 | +35:43:34.4 | HIP 35282 | 30.57 |
| 2026-06-02 00:00 | 07:20:36.00 | +35:42:42.5 | HIP 35755 | 25.91 |
| 2026-06-02 12:00 | 07:21:44.29 | +35:41:48.7 | HIP 35755 | 15.43 |
| 2026-06-03 00:00 | 07:22:52.54 | +35:40:53.2 | HIP 35755 | 13.81 |
| 2026-06-03 12:00 | 07:24:00.77 | +35:39:55.9 | HIP 35880 | 10.45 |
| 2026-06-04 00:00 | 07:25:08.96 | +35:38:56.8 | HIP 35880 | 18.25 |
| 2026-06-04 12:00 | 07:26:17.12 | +35:37:55.9 | HIP 36183 | 12.63 |
| 2026-06-05 00:00 | 07:27:25.24 | +35:36:53.3 | HIP 36233 | 3.68 |
| 2026-06-05 12:00 | 07:28:33.33 | +35:35:49.0 | HIP 36233 | 10.52 |
| 2026-06-06 00:00 | 07:29:41.37 | +35:34:42.9 | HIP 36233 | 24.35 |
| 2026-06-06 12:00 | 07:30:49.39 | +35:33:35.0 | HIP 36632 | 14.83 |
| 2026-06-07 00:00 | 07:31:57.36 | +35:32:25.5 | HIP 36632 | 3.83 |
| 2026-06-07 12:00 | 07:33:05.29 | +35:31:14.2 | HIP 36632 | 13.94 |
| 2026-06-08 00:00 | 07:34:13.18 | +35:30:01.2 | HIP 36632 | 27.54 |
| 2026-06-08 12:00 | 07:35:21.03 | +35:28:46.6 | HIP 37021 | 14.68 |
| 2026-06-09 00:00 | 07:36:28.84 | +35:27:30.2 | HIP 37021 | 2.14 |
| 2026-06-09 12:00 | 07:37:36.61 | +35:26:12.1 | HIP 37021 | 13.35 |
| 2026-06-10 00:00 | 07:38:44.33 | +35:24:52.4 | HIP 37204 | 22.09 |
| 2026-06-10 12:00 | 07:39:52.00 | +35:23:31.0 | HIP 37204 | 26.19 |
| 2026-06-11 00:00 | 07:40:59.63 | +35:22:07.9 | HIP 37204 | 35.62 |
| 2026-06-11 12:00 | 07:42:07.22 | +35:20:43.2 | HIP 37744 | 30.84 |
| 2026-06-12 00:00 | 07:43:14.75 | +35:19:16.8 | HIP 37744 | 17.66 |
| 2026-06-12 12:00 | 07:44:22.24 | +35:17:48.8 | HIP 37744 | 7.54 |
| 2026-06-13 00:00 | 07:45:29.68 | +35:16:19.1 | HIP 37744 | 13.61 |
| 2026-06-13 12:00 | 07:46:37.06 | +35:14:47.9 | HIP 37980 | 18.04 |
| 2026-06-14 00:00 | 07:47:44.40 | +35:13:15.0 | HIP 37980 | 17.53 |
| 2026-06-14 12:00 | 07:48:51.68 | +35:11:40.6 | HIP 38053 | 23.38 |
| 2026-06-15 00:00 | 07:49:58.90 | +35:10:04.5 | HIP 38348 | 18.64 |
| 2026-06-15 12:00 | 07:51:06.08 | +35:08:26.9 | HIP 38348 | 8.77 |
| 2026-06-16 00:00 | 07:52:13.19 | +35:06:47.8 | HIP 38348 | 13.74 |
| 2026-06-16 12:00 | 07:53:20.25 | +35:05:07.0 | HIP 38644 | 17.62 |
| 2026-06-17 00:00 | 07:54:27.25 | +35:03:24.7 | HIP 38644 | 4.61 |
| 2026-06-17 12:00 | 07:55:34.19 | +35:01:40.9 | HIP 38644 | 10.66 |
| 2026-06-18 00:00 | 07:56:41.07 | +34:59:55.6 | HIP 38961 | 20.37 |
| 2026-06-18 12:00 | 07:57:47.89 | +34:58:08.7 | HIP 38961 | 6.61 |
| 2026-06-19 00:00 | 07:58:54.64 | +34:56:20.4 | HIP 38961 | 7.32 |
| 2026-06-19 12:00 | 08:00:01.33 | +34:54:30.5 | HIP 39057 | 15.60 |
| 2026-06-20 00:00 | 08:01:07.96 | +34:52:39.1 | HIP 39057 | 24.23 |
| 2026-06-20 12:00 | 08:02:14.52 | +34:50:46.3 | HIP 39279 | 34.24 |
| 2026-06-21 00:00 | 08:03:21.01 | +34:48:52.0 | HIP 39649 | 35.70 |
| 2026-06-21 12:00 | 08:04:27.44 | +34:46:56.3 | HIP 39649 | 22.07 |
| 2026-06-22 00:00 | 08:05:33.80 | +34:44:59.1 | HIP 39649 | 8.93 |