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 | 0.997 |
| gb | -0.748 |
| k | 0.836 |
| δ90 | 9.994 |
| 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 | +9.6293 | +1.324 |
| 2020-12-16 | 2021-01-12 | -35.9795 | -3.709 |
| 2021-01-12 | 2021-01-28 | +43.7393 | -0.997 |
| 2021-01-28 | 2021-03-31 | -1.4294 | -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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 03:47:08.16 | +19:11:11.6 | HIP 17740 | 33.45 |
| 2026-05-12 12:00 | 03:49:47.13 | +19:14:03.7 | HIP 17961 | 8.68 |
| 2026-05-13 00:00 | 03:52:25.74 | +19:16:46.8 | HIP 18091 | 19.93 |
| 2026-05-13 12:00 | 03:55:04.00 | +19:19:20.9 | HIP 18347 | 5.35 |
| 2026-05-14 00:00 | 03:57:41.88 | +19:21:46.0 | HIP 18409 | 23.38 |
| 2026-05-14 12:00 | 04:00:19.37 | +19:24:02.3 | HIP 18784 | 20.09 |
| 2026-05-15 00:00 | 04:02:56.46 | +19:26:09.6 | HIP 18946 | 10.08 |
| 2026-05-15 12:00 | 04:05:33.15 | +19:28:08.2 | HIP 19082 | 2.40 |
| 2026-05-16 00:00 | 04:08:09.41 | +19:29:58.0 | HIP 19308 | 14.53 |
| 2026-05-16 12:00 | 04:10:45.25 | +19:31:39.2 | HIP 19388 | 22.99 |
| 2026-05-17 00:00 | 04:13:20.64 | +19:33:11.7 | HIP 19669 | 7.49 |
| 2026-05-17 12:00 | 04:15:55.57 | +19:34:35.7 | HIP 19975 | 16.57 |
| 2026-05-18 00:00 | 04:18:30.04 | +19:35:51.2 | HIP 20018 | 12.41 |
| 2026-05-18 12:00 | 04:21:04.04 | +19:36:58.3 | HIP 20369 | 12.68 |
| 2026-05-19 00:00 | 04:23:37.56 | +19:37:57.0 | HIP 20482 | 3.82 |
| 2026-05-19 12:00 | 04:26:10.58 | +19:38:47.5 | HIP 20774 | 16.83 |
| 2026-05-20 00:00 | 04:28:43.10 | +19:39:29.7 | HIP 20890 | 5.15 |
| 2026-05-20 12:00 | 04:31:15.10 | +19:40:03.8 | HIP 21008 | 16.99 |
| 2026-05-21 00:00 | 04:33:46.59 | +19:40:29.9 | HIP 21240 | 9.99 |
| 2026-05-21 12:00 | 04:36:17.55 | +19:40:48.1 | HIP 21465 | 6.27 |
| 2026-05-22 00:00 | 04:38:47.97 | +19:40:58.3 | HIP 21465 | 31.70 |
| 2026-05-22 12:00 | 04:41:17.85 | +19:41:00.7 | HIP 21831 | 6.88 |
| 2026-05-23 00:00 | 04:43:47.18 | +19:40:55.5 | HIP 21875 | 23.92 |
| 2026-05-23 12:00 | 04:46:15.94 | +19:40:42.6 | HIP 22211 | 12.01 |
| 2026-05-24 00:00 | 04:48:44.14 | +19:40:22.2 | HIP 22357 | 3.10 |
| 2026-05-24 12:00 | 04:51:11.77 | +19:39:54.3 | HIP 22486 | 20.41 |
| 2026-05-25 00:00 | 04:53:38.82 | +19:39:19.1 | HIP 22850 | 21.32 |
| 2026-05-25 12:00 | 04:56:05.28 | +19:38:36.6 | HIP 22850 | 18.40 |
| 2026-05-26 00:00 | 04:58:31.16 | +19:37:47.0 | HIP 23178 | 11.38 |
| 2026-05-26 12:00 | 05:00:56.44 | +19:36:50.2 | HIP 23356 | 19.90 |
| 2026-05-27 00:00 | 05:03:21.11 | +19:35:46.5 | HIP 23587 | 29.89 |
| 2026-05-27 12:00 | 05:05:45.19 | +19:34:35.9 | HIP 23695 | 14.15 |
| 2026-05-28 00:00 | 05:08:08.65 | +19:33:18.5 | HIP 23949 | 20.76 |
| 2026-05-28 12:00 | 05:10:31.49 | +19:31:54.4 | HIP 23949 | 30.88 |
| 2026-05-29 00:00 | 05:12:53.72 | +19:30:23.6 | HIP 24284 | 9.90 |
| 2026-05-29 12:00 | 05:15:15.32 | +19:28:46.4 | HIP 24574 | 18.37 |
| 2026-05-30 00:00 | 05:17:36.30 | +19:27:02.7 | HIP 24615 | 14.56 |
| 2026-05-30 12:00 | 05:19:56.65 | +19:25:12.7 | HIP 24906 | 10.77 |
| 2026-05-31 00:00 | 05:22:16.36 | +19:23:16.5 | HIP 25134 | 23.60 |
| 2026-05-31 12:00 | 05:24:35.44 | +19:21:14.2 | HIP 25134 | 33.11 |
| 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 |