141P/Machholz 2
메타데이터
| 항목 | 값 |
|---|---|
| Designation | 141P/Machholz 2 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2020-12-15T22:59:55.132800Z |
| Orbit solution date (soln_date, UTC) | 2024-08-26T12:39:49Z |
| Obs used | 852 |
| NEO | Yes |
| M1 | 17.300 |
| K1 | 4.500 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2019-08-01.0000000 |
| e | 0.73668750 |
| q (au) | 0.804381 |
| a (au) | 3.054854 |
| i (deg) | 13.977322 |
| Ω (om, deg) | 241.877240 |
| ω (w, deg) | 153.615394 |
| M (ma, deg) | 267.156738 |
밝기
산란 + 전체 선형
$$ M_a = (16.744 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 16.744 |
| n | 2.000 |
| gf | 0.998 |
| gb | -0.747 |
| k | 0.836 |
| δ90 | 9.995 |
| 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 |
|---|---|---|---|
| 2020-08-13 | 2020-12-15 | +9.6272 | +1.324 |
| 2020-12-16 | 2021-01-12 | -35.9796 | -3.709 |
| 2021-01-12 | 2021-01-28 | +43.7428 | -0.997 |
| 2021-01-28 | 2021-03-31 | -1.4306 | -0.971 |
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 | 05:26:53.88 | +19:19:05.8 | HIP 25534 | 10.20 |
| 2026-06-01 12:00 | 05:29:11.68 | +19:16:51.4 | HIP 25534 | 22.39 |
| 2026-06-02 00:00 | 05:31:28.84 | +19:14:31.2 | HIP 25867 | 13.26 |
| 2026-06-02 12:00 | 05:33:45.35 | +19:12:05.3 | HIP 25965 | 20.23 |
| 2026-06-03 00:00 | 05:36:01.21 | +19:09:33.6 | HIP 26411 | 19.87 |
| 2026-06-03 12:00 | 05:38:16.43 | +19:06:56.5 | HIP 26411 | 15.53 |
| 2026-06-04 00:00 | 05:40:30.99 | +19:04:13.8 | HIP 26826 | 24.37 |
| 2026-06-04 12:00 | 05:42:44.91 | +19:01:25.7 | HIP 26925 | 3.33 |
| 2026-06-05 00:00 | 05:44:58.17 | +18:58:32.4 | HIP 27191 | 16.33 |
| 2026-06-05 12:00 | 05:47:10.78 | +18:55:33.8 | HIP 27218 | 15.26 |
| 2026-06-06 00:00 | 05:49:22.74 | +18:52:30.2 | HIP 27465 | 13.37 |
| 2026-06-06 12:00 | 05:51:34.04 | +18:49:21.5 | HIP 27594 | 15.19 |
| 2026-06-07 00:00 | 05:53:44.68 | +18:46:07.9 | HIP 27911 | 11.91 |
| 2026-06-07 12:00 | 05:55:54.68 | +18:42:49.4 | HIP 27911 | 24.55 |
| 2026-06-08 00:00 | 05:58:04.02 | +18:39:26.2 | HIP 28307 | 15.49 |
| 2026-06-08 12:00 | 06:00:12.70 | +18:35:58.3 | HIP 28359 | 17.99 |
| 2026-06-09 00:00 | 06:02:20.73 | +18:32:25.8 | HIP 28708 | 26.52 |
| 2026-06-09 12:00 | 06:04:28.11 | +18:28:48.9 | HIP 28815 | 12.52 |
| 2026-06-10 00:00 | 06:06:34.83 | +18:25:07.5 | HIP 29073 | 19.78 |
| 2026-06-10 12:00 | 06:08:40.90 | +18:21:21.8 | HIP 29073 | 10.51 |
| 2026-06-11 00:00 | 06:10:46.32 | +18:17:31.8 | HIP 29326 | 10.37 |
| 2026-06-11 12:00 | 06:12:51.09 | +18:13:37.7 | HIP 29326 | 26.61 |
| 2026-06-12 00:00 | 06:14:55.21 | +18:09:39.5 | HIP 29731 | 13.68 |
| 2026-06-12 12:00 | 06:16:58.68 | +18:05:37.3 | HIP 29875 | 8.98 |
| 2026-06-13 00:00 | 06:19:01.50 | +18:01:31.1 | HIP 30139 | 22.15 |
| 2026-06-13 12:00 | 06:21:03.68 | +17:57:21.2 | HIP 30146 | 8.13 |
| 2026-06-14 00:00 | 06:23:05.21 | +17:53:07.4 | HIP 30400 | 15.47 |
| 2026-06-14 12:00 | 06:25:06.10 | +17:48:50.0 | HIP 30400 | 24.10 |
| 2026-06-15 00:00 | 06:27:06.35 | +17:44:29.0 | HIP 30687 | 17.59 |
| 2026-06-15 12:00 | 06:29:05.95 | +17:40:04.4 | HIP 30890 | 4.69 |
| 2026-06-16 00:00 | 06:31:04.92 | +17:35:36.4 | HIP 30954 | 17.98 |
| 2026-06-16 12:00 | 06:33:03.25 | +17:31:05.0 | HIP 31156 | 19.06 |
| 2026-06-17 00:00 | 06:35:00.94 | +17:26:30.3 | HIP 31503 | 18.87 |
| 2026-06-17 12:00 | 06:36:58.00 | +17:21:52.4 | HIP 31635 | 12.38 |
| 2026-06-18 00:00 | 06:38:54.43 | +17:17:11.3 | HIP 31857 | 26.83 |
| 2026-06-18 12:00 | 06:40:50.23 | +17:12:27.1 | HIP 31950 | 26.25 |
| 2026-06-19 00:00 | 06:42:45.41 | +17:07:39.9 | HIP 32224 | 24.12 |
| 2026-06-19 12:00 | 06:44:39.96 | +17:02:49.7 | HIP 32224 | 21.82 |
| 2026-06-20 00:00 | 06:46:33.89 | +16:57:56.7 | HIP 32525 | 9.81 |
| 2026-06-20 12:00 | 06:48:27.20 | +16:53:00.8 | HIP 32525 | 17.77 |
| 2026-06-21 00:00 | 06:50:19.89 | +16:48:02.2 | HIP 32789 | 20.92 |
| 2026-06-21 12:00 | 06:52:11.97 | +16:43:00.9 | HIP 32958 | 7.79 |
| 2026-06-22 00:00 | 06:54:03.44 | +16:37:57.0 | HIP 33230 | 23.70 |