P/2021 V2 (Fuls)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | P/2021 V2 (Fuls) |
| Type | P |
| Perihelion (tp_cal, UTC) | 2023-01-21T10:09:35.496000Z |
| Orbit solution date (soln_date, UTC) | 2024-06-06T23:12:42Z |
| Obs used | 500 |
| NEO | - |
| M1 | 13.500 |
| K1 | 4.750 |
| PC | - |
| Discovery observation (MPC, UTC) | 2021-11-07T07:16:45.811200Z |
| Discovery magnitude (MPC) | 19.72 G |
| Discovery observatory (MPC) | G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-12-05.0000000 |
| e | 0.61379381 |
| q (au) | 3.496557 |
| a (au) | 9.053602 |
| i (deg) | 12.694194 |
| Ω (om, deg) | 232.285290 |
| ω (w, deg) | 259.829523 |
| M (ma, deg) | 358.284211 |
밝기
산란 + 전체 선형
$$ M_a = (11.970 + 2.369\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 11.970 |
| n | 2.369 |
| gf | 1.000 |
| gb | -0.928 |
| k | 1.000 |
| 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 |
|---|---|---|---|
| 2021-08-07 | 2022-01-05 | +33.5068 | -22.228 |
| 2022-01-05 | 2023-01-20 | -9.6477 | +5.268 |
| 2023-01-22 | 2024-05-31 | +2.3305 | -1.332 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 16:20:16.60 | -16:40:42.4 | HIP 80072 | 24.57 |
| 2026-07-29 12:00 | 16:20:13.61 | -16:40:37.2 | HIP 80072 | 24.79 |
| 2026-07-30 00:00 | 16:20:10.75 | -16:40:32.4 | HIP 80072 | 25.01 |
| 2026-07-30 12:00 | 16:20:08.01 | -16:40:27.9 | HIP 80072 | 25.24 |
| 2026-07-31 00:00 | 16:20:05.38 | -16:40:23.8 | HIP 80072 | 25.47 |
| 2026-07-31 12:00 | 16:20:02.88 | -16:40:20.0 | HIP 80072 | 25.70 |
| 2026-08-01 00:00 | 16:20:00.49 | -16:40:16.7 | HIP 80072 | 25.93 |
| 2026-08-01 12:00 | 16:19:58.23 | -16:40:13.6 | HIP 80072 | 26.15 |
| 2026-08-02 00:00 | 16:19:56.09 | -16:40:11.0 | HIP 80072 | 26.37 |
| 2026-08-02 12:00 | 16:19:54.07 | -16:40:08.7 | HIP 80072 | 26.58 |
| 2026-08-03 00:00 | 16:19:52.17 | -16:40:06.8 | HIP 80072 | 26.77 |
| 2026-08-03 12:00 | 16:19:50.39 | -16:40:05.2 | HIP 80072 | 26.96 |
| 2026-08-04 00:00 | 16:19:48.73 | -16:40:04.0 | HIP 80072 | 27.14 |
| 2026-08-04 12:00 | 16:19:47.19 | -16:40:03.1 | HIP 80072 | 27.30 |
| 2026-08-05 00:00 | 16:19:45.78 | -16:40:02.6 | HIP 80072 | 27.45 |
| 2026-08-05 12:00 | 16:19:44.48 | -16:40:02.5 | HIP 80072 | 27.59 |
| 2026-08-06 00:00 | 16:19:43.31 | -16:40:02.7 | HIP 80072 | 27.71 |
| 2026-08-06 12:00 | 16:19:42.26 | -16:40:03.2 | HIP 80072 | 27.81 |
| 2026-08-07 00:00 | 16:19:41.33 | -16:40:04.2 | HIP 80072 | 27.90 |
| 2026-08-07 12:00 | 16:19:40.52 | -16:40:05.4 | HIP 80072 | 27.97 |
| 2026-08-08 00:00 | 16:19:39.84 | -16:40:07.1 | HIP 80072 | 28.02 |
| 2026-08-08 12:00 | 16:19:39.27 | -16:40:09.0 | HIP 80072 | 28.05 |
| 2026-08-09 00:00 | 16:19:38.83 | -16:40:11.4 | HIP 80072 | 28.07 |
| 2026-08-09 12:00 | 16:19:38.51 | -16:40:14.0 | HIP 80072 | 28.06 |
| 2026-08-10 00:00 | 16:19:38.32 | -16:40:17.1 | HIP 80072 | 28.04 |
| 2026-08-10 12:00 | 16:19:38.24 | -16:40:20.4 | HIP 80072 | 28.00 |
| 2026-08-11 00:00 | 16:19:38.29 | -16:40:24.1 | HIP 80072 | 27.94 |
| 2026-08-11 12:00 | 16:19:38.46 | -16:40:28.2 | HIP 80072 | 27.86 |
| 2026-08-12 00:00 | 16:19:38.75 | -16:40:32.6 | HIP 80072 | 27.77 |
| 2026-08-12 12:00 | 16:19:39.17 | -16:40:37.3 | HIP 80072 | 27.65 |
| 2026-08-13 00:00 | 16:19:39.70 | -16:40:42.4 | HIP 80072 | 27.51 |
| 2026-08-13 12:00 | 16:19:40.36 | -16:40:47.8 | HIP 80072 | 27.36 |
| 2026-08-14 00:00 | 16:19:41.14 | -16:40:53.5 | HIP 80072 | 27.19 |
| 2026-08-14 12:00 | 16:19:42.04 | -16:40:59.6 | HIP 80072 | 27.00 |
| 2026-08-15 00:00 | 16:19:43.07 | -16:41:06.0 | HIP 80072 | 26.79 |
| 2026-08-15 12:00 | 16:19:44.21 | -16:41:12.7 | HIP 80072 | 26.56 |
| 2026-08-16 00:00 | 16:19:45.48 | -16:41:19.8 | HIP 80072 | 26.32 |
| 2026-08-16 12:00 | 16:19:46.87 | -16:41:27.1 | HIP 80072 | 26.07 |
| 2026-08-17 00:00 | 16:19:48.38 | -16:41:34.8 | HIP 80072 | 25.80 |
| 2026-08-17 12:00 | 16:19:50.00 | -16:41:42.8 | HIP 80072 | 25.51 |
| 2026-08-18 00:00 | 16:19:51.75 | -16:41:51.1 | HIP 80072 | 25.21 |
| 2026-08-18 12:00 | 16:19:53.62 | -16:41:59.8 | HIP 80072 | 24.90 |
| 2026-08-19 00:00 | 16:19:55.61 | -16:42:08.7 | HIP 80072 | 24.58 |