C/2016 Q2 (PANSTARRS)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2016 Q2 (PANSTARRS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2021-05-11T15:07:39.907200Z |
| Orbit solution date (soln_date, UTC) | 2024-04-20T20:42:17Z |
| Obs used | 662 |
| NEO | - |
| M1 | 10.800 |
| K1 | 4.500 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2020-08-26.0000000 |
| e | 0.99986869 |
| q (au) | 7.082106 |
| a (au) | 53935.651327 |
| i (deg) | 109.388884 |
| Ω (om, deg) | 322.298041 |
| ω (w, deg) | 84.508570 |
| M (ma, deg) | 359.999980 |
밝기
산란 + 전체 선형
$$ M_a = (9.586 + 4.868\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 9.586 |
| n | 4.868 |
| gf | 1.000 |
| gb | -0.925 |
| k | 0.800 |
| 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 |
|---|---|---|---|
| 2016-08-26 | 2017-08-25 | -21.8320 | +23.366 |
| 2017-08-25 | 2018-08-14 | -2.5298 | +3.124 |
| 2018-08-14 | 2019-08-10 | +29.5957 | -28.173 |
| 2019-08-10 | 2021-05-07 | -11.4200 | +9.723 |
| 2021-05-13 | 2024-04-12 | +5.4378 | -4.459 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-09-25 00:00 | 10:07:14.97 | +18:39:26.3 | HIP 49635 | 11.99 |
| 2026-09-25 12:00 | 10:07:20.09 | +18:38:34.1 | HIP 49635 | 10.52 |
| 2026-09-26 00:00 | 10:07:25.17 | +18:37:42.2 | HIP 49635 | 9.08 |
| 2026-09-26 12:00 | 10:07:30.21 | +18:36:50.5 | HIP 49635 | 7.65 |
| 2026-09-27 00:00 | 10:07:35.22 | +18:35:59.1 | HIP 49635 | 6.26 |
| 2026-09-27 12:00 | 10:07:40.19 | +18:35:08.0 | HIP 49635 | 4.92 |
| 2026-09-28 00:00 | 10:07:45.12 | +18:34:17.1 | HIP 49635 | 3.67 |
| 2026-09-28 12:00 | 10:07:50.02 | +18:33:26.6 | HIP 49635 | 2.64 |
| 2026-09-29 00:00 | 10:07:54.87 | +18:32:36.3 | HIP 49635 | 2.13 |
| 2026-09-29 12:00 | 10:07:59.69 | +18:31:46.3 | HIP 49635 | 2.48 |
| 2026-09-30 00:00 | 10:08:04.47 | +18:30:56.6 | HIP 49635 | 3.42 |
| 2026-09-30 12:00 | 10:08:09.21 | +18:30:07.2 | HIP 49635 | 4.59 |
| 2026-10-01 00:00 | 10:08:13.91 | +18:29:18.1 | HIP 49635 | 5.85 |
| 2026-10-01 12:00 | 10:08:18.57 | +18:28:29.3 | HIP 49635 | 7.14 |
| 2026-10-02 00:00 | 10:08:23.19 | +18:27:40.7 | HIP 49635 | 8.45 |
| 2026-10-02 12:00 | 10:08:27.76 | +18:26:52.5 | HIP 49635 | 9.76 |
| 2026-10-03 00:00 | 10:08:32.30 | +18:26:04.6 | HIP 49729 | 10.32 |
| 2026-10-03 12:00 | 10:08:36.79 | +18:25:16.9 | HIP 49729 | 9.96 |
| 2026-10-04 00:00 | 10:08:41.25 | +18:24:29.6 | HIP 49729 | 9.77 |
| 2026-10-04 12:00 | 10:08:45.65 | +18:23:42.6 | HIP 49729 | 9.76 |
| 2026-10-05 00:00 | 10:08:50.02 | +18:22:55.8 | HIP 49729 | 9.92 |
| 2026-10-05 12:00 | 10:08:54.34 | +18:22:09.4 | HIP 49729 | 10.25 |
| 2026-10-06 00:00 | 10:08:58.62 | +18:21:23.3 | HIP 49729 | 10.71 |
| 2026-10-06 12:00 | 10:09:02.85 | +18:20:37.5 | HIP 49729 | 11.30 |
| 2026-10-07 00:00 | 10:09:07.03 | +18:19:52.0 | HIP 49729 | 11.98 |
| 2026-10-07 12:00 | 10:09:11.17 | +18:19:06.9 | HIP 49729 | 12.75 |
| 2026-10-08 00:00 | 10:09:15.27 | +18:18:22.0 | HIP 49729 | 13.58 |
| 2026-10-08 12:00 | 10:09:19.31 | +18:17:37.5 | HIP 49813 | 13.13 |
| 2026-10-09 00:00 | 10:09:23.31 | +18:16:53.3 | HIP 49813 | 11.95 |
| 2026-10-09 12:00 | 10:09:27.27 | +18:16:09.4 | HIP 49813 | 10.78 |
| 2026-10-10 00:00 | 10:09:31.17 | +18:15:25.8 | HIP 49813 | 9.63 |
| 2026-10-10 12:00 | 10:09:35.02 | +18:14:42.6 | HIP 49813 | 8.49 |
| 2026-10-11 00:00 | 10:09:38.83 | +18:13:59.7 | HIP 49813 | 7.38 |
| 2026-10-11 12:00 | 10:09:42.59 | +18:13:17.1 | HIP 49813 | 6.30 |
| 2026-10-12 00:00 | 10:09:46.29 | +18:12:34.9 | HIP 49813 | 5.25 |
| 2026-10-12 12:00 | 10:09:49.95 | +18:11:53.0 | HIP 49813 | 4.26 |
| 2026-10-13 00:00 | 10:09:53.55 | +18:11:11.4 | HIP 49813 | 3.36 |
| 2026-10-13 12:00 | 10:09:57.11 | +18:10:30.2 | HIP 49813 | 2.62 |
| 2026-10-14 00:00 | 10:10:00.61 | +18:09:49.3 | HIP 49813 | 2.21 |
| 2026-10-14 12:00 | 10:10:04.06 | +18:09:08.8 | HIP 49813 | 2.27 |
| 2026-10-15 00:00 | 10:10:07.46 | +18:08:28.5 | HIP 49813 | 2.78 |
| 2026-10-15 12:00 | 10:10:10.80 | +18:07:48.7 | HIP 49813 | 3.52 |
| 2026-10-16 00:00 | 10:10:14.09 | +18:07:09.2 | HIP 49813 | 4.37 |