C/2019 U5 (PANSTARRS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2019 U5 (PANSTARRS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2023-03-29T21:49:38.544960Z |
| Orbit solution date (soln_date, UTC) | 2026-03-11T21:13:03Z |
| Obs used | 5421 |
| NEO | - |
| M1 | 8.200 |
| K1 | 5.750 |
| PC | - |
| Discovery observation (MPC, UTC) | 2019-10-22T05:17:08.131200Z |
| Discovery magnitude (MPC) | 21.16 w |
| Discovery observatory (MPC) | F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-09-27.0000000 |
| e | 1.00143151 |
| q (au) | 3.624067 |
| a (au) | -2531.636497 |
| i (deg) | 113.521207 |
| Ω (om, deg) | 2.637190 |
| ω (w, deg) | 181.508925 |
| M (ma, deg) | -0.001423 |
밝기
산란 + 전체 선형
$$ M_a = (7.169 + 2.224\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 7.169 |
| n | 2.224 |
| gf | 0.999 |
| gb | -0.502 |
| 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 |
|---|---|---|---|
| 2019-10-11 | 2022-03-07 | +5.0029 | -3.919 |
| 2022-03-07 | 2023-03-29 | +0.7843 | -0.681 |
| 2023-03-29 | 2024-06-07 | -3.7649 | +2.184 |
| 2024-06-07 | 2026-02-13 | +1.1231 | -1.186 |
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 | 04:53:22.37 | -36:49:27.6 | HIP 22641 | 32.82 |
| 2026-07-29 12:00 | 04:53:26.99 | -36:51:07.9 | HIP 22641 | 34.72 |
| 2026-07-30 00:00 | 04:53:31.53 | -36:52:49.0 | HIP 22641 | 36.63 |
| 2026-07-30 12:00 | 04:53:35.98 | -36:54:31.0 | HIP 22641 | 38.55 |
| 2026-07-31 00:00 | 04:53:40.35 | -36:56:13.7 | HIP 22641 | 40.47 |
| 2026-07-31 12:00 | 04:53:44.62 | -36:57:57.3 | HIP 22493 | 41.24 |
| 2026-08-01 00:00 | 04:53:48.80 | -36:59:41.7 | HIP 22493 | 41.79 |
| 2026-08-01 12:00 | 04:53:52.89 | -37:01:26.9 | HIP 22493 | 42.40 |
| 2026-08-02 00:00 | 04:53:56.90 | -37:03:12.9 | HIP 22493 | 43.07 |
| 2026-08-02 12:00 | 04:54:00.80 | -37:04:59.7 | HIP 22493 | 43.80 |
| 2026-08-03 00:00 | 04:54:04.62 | -37:06:47.3 | HIP 22493 | 44.58 |
| 2026-08-03 12:00 | 04:54:08.34 | -37:08:35.7 | HIP 22493 | 45.41 |
| 2026-08-04 00:00 | 04:54:11.97 | -37:10:24.9 | HIP 22493 | 46.29 |
| 2026-08-04 12:00 | 04:54:15.50 | -37:12:14.8 | HIP 22997 | 44.82 |
| 2026-08-05 00:00 | 04:54:18.94 | -37:14:05.5 | HIP 22997 | 43.01 |
| 2026-08-05 12:00 | 04:54:22.28 | -37:15:57.0 | HIP 22997 | 41.22 |
| 2026-08-06 00:00 | 04:54:25.52 | -37:17:49.2 | HIP 22997 | 39.45 |
| 2026-08-06 12:00 | 04:54:28.66 | -37:19:42.1 | HIP 22997 | 37.70 |
| 2026-08-07 00:00 | 04:54:31.71 | -37:21:35.8 | HIP 22997 | 35.99 |
| 2026-08-07 12:00 | 04:54:34.66 | -37:23:30.3 | HIP 22997 | 34.32 |
| 2026-08-08 00:00 | 04:54:37.50 | -37:25:25.4 | HIP 22997 | 32.70 |
| 2026-08-08 12:00 | 04:54:40.25 | -37:27:21.3 | HIP 22997 | 31.12 |
| 2026-08-09 00:00 | 04:54:42.90 | -37:29:17.9 | HIP 22997 | 29.62 |
| 2026-08-09 12:00 | 04:54:45.44 | -37:31:15.2 | HIP 22997 | 28.18 |
| 2026-08-10 00:00 | 04:54:47.88 | -37:33:13.2 | HIP 22997 | 26.84 |
| 2026-08-10 12:00 | 04:54:50.21 | -37:35:11.9 | HIP 22997 | 25.60 |
| 2026-08-11 00:00 | 04:54:52.45 | -37:37:11.2 | HIP 22997 | 24.48 |
| 2026-08-11 12:00 | 04:54:54.57 | -37:39:11.2 | HIP 22997 | 23.50 |
| 2026-08-12 00:00 | 04:54:56.59 | -37:41:11.9 | HIP 22997 | 22.69 |
| 2026-08-12 12:00 | 04:54:58.51 | -37:43:13.3 | HIP 22997 | 22.06 |
| 2026-08-13 00:00 | 04:55:00.31 | -37:45:15.3 | HIP 22997 | 21.62 |
| 2026-08-13 12:00 | 04:55:02.01 | -37:47:17.9 | HIP 22997 | 21.41 |
| 2026-08-14 00:00 | 04:55:03.60 | -37:49:21.2 | HIP 22997 | 21.41 |
| 2026-08-14 12:00 | 04:55:05.08 | -37:51:25.0 | HIP 22997 | 21.64 |
| 2026-08-15 00:00 | 04:55:06.45 | -37:53:29.5 | HIP 22786 | 20.39 |
| 2026-08-15 12:00 | 04:55:07.71 | -37:55:34.6 | HIP 22786 | 18.93 |
| 2026-08-16 00:00 | 04:55:08.86 | -37:57:40.2 | HIP 22786 | 17.58 |
| 2026-08-16 12:00 | 04:55:09.90 | -37:59:46.5 | HIP 22786 | 16.36 |
| 2026-08-17 00:00 | 04:55:10.83 | -38:01:53.3 | HIP 22786 | 15.31 |
| 2026-08-17 12:00 | 04:55:11.64 | -38:04:00.7 | HIP 22786 | 14.48 |
| 2026-08-18 00:00 | 04:55:12.34 | -38:06:08.6 | HIP 22786 | 13.90 |
| 2026-08-18 12:00 | 04:55:12.93 | -38:08:17.0 | HIP 22786 | 13.61 |
| 2026-08-19 00:00 | 04:55:13.40 | -38:10:26.0 | HIP 22786 | 13.64 |