65P/Gunn
메타데이터
| 항목 | 값 |
|---|---|
| Designation | 65P/Gunn |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-10-17T19:28:05.684160Z |
| Orbit solution date (soln_date, UTC) | 2025-12-03T12:36:51Z |
| Obs used | 3121 |
| NEO | - |
| M1 | 11.600 |
| K1 | 6.500 |
| PC | - |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2020-08-06.0000000 |
| e | 0.24983241 |
| q (au) | 2.913890 |
| a (au) | 3.884319 |
| i (deg) | 9.182830 |
| Ω (om, deg) | 62.020609 |
| ω (w, deg) | 213.806901 |
| M (ma, deg) | 131.730867 |
밝기
산란 + 전체 선형
$$ M_a = (11.073 + 2.686\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 11.073 |
| n | 2.686 |
| gf | 0.811 |
| gb | -0.500 |
| k | 0.977 |
| δ90 | 1.000 |
| 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 |
|---|---|---|---|
| 2021-12-05 | 2024-04-07 | -8.9341 | +4.469 |
| 2024-04-07 | 2025-11-22 | +5.8403 | -3.285 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
찾아보기
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 23:01:09.46 | -14:05:14.9 | HIP 113631 | 11.51 |
| 2026-03-26 12:00 | 23:01:50.85 | -14:01:20.7 | HIP 113675 | 16.24 |
| 2026-03-27 00:00 | 23:02:32.17 | -13:57:26.7 | HIP 113798 | 18.00 |
| 2026-03-27 12:00 | 23:03:13.41 | -13:53:33.2 | HIP 113798 | 22.80 |
| 2026-03-28 00:00 | 23:03:54.59 | -13:49:39.9 | HIP 113798 | 30.75 |
| 2026-03-28 12:00 | 23:04:35.69 | -13:45:47.0 | HIP 114094 | 27.84 |
| 2026-03-29 00:00 | 23:05:16.72 | -13:41:54.5 | HIP 114094 | 18.16 |
| 2026-03-29 12:00 | 23:05:57.67 | -13:38:02.2 | HIP 114094 | 10.63 |
| 2026-03-30 00:00 | 23:06:38.55 | -13:34:10.4 | HIP 114094 | 11.13 |
| 2026-03-30 12:00 | 23:07:19.36 | -13:30:18.9 | HIP 114094 | 19.01 |
| 2026-03-31 00:00 | 23:08:00.10 | -13:26:27.8 | HIP 114311 | 22.36 |
| 2026-03-31 12:00 | 23:08:40.76 | -13:22:37.0 | HIP 114311 | 21.02 |
| 2026-04-01 00:00 | 23:09:21.35 | -13:18:46.7 | HIP 114426 | 15.58 |
| 2026-04-01 12:00 | 23:10:01.87 | -13:14:56.7 | HIP 114426 | 6.78 |
| 2026-04-02 00:00 | 23:10:42.31 | -13:11:07.1 | HIP 114426 | 8.53 |
| 2026-04-02 12:00 | 23:11:22.67 | -13:07:17.9 | HIP 114426 | 17.94 |
| 2026-04-03 00:00 | 23:12:02.97 | -13:03:29.1 | HIP 114499 | 23.51 |
| 2026-04-03 12:00 | 23:12:43.18 | -12:59:40.8 | HIP 114499 | 26.31 |
| 2026-04-04 00:00 | 23:13:23.33 | -12:55:52.8 | HIP 114669 | 28.45 |
| 2026-04-04 12:00 | 23:14:03.39 | -12:52:05.2 | HIP 114669 | 31.80 |
| 2026-04-05 00:00 | 23:14:43.38 | -12:48:18.1 | HIP 114854 | 28.30 |
| 2026-04-05 12:00 | 23:15:23.30 | -12:44:31.4 | HIP 114854 | 27.45 |
| 2026-04-06 00:00 | 23:16:03.14 | -12:40:45.2 | HIP 115021 | 25.67 |
| 2026-04-06 12:00 | 23:16:42.90 | -12:36:59.4 | HIP 115021 | 18.44 |
| 2026-04-07 00:00 | 23:17:22.59 | -12:33:14.1 | HIP 115021 | 15.41 |
| 2026-04-07 12:00 | 23:18:02.19 | -12:29:29.2 | HIP 115021 | 18.71 |
| 2026-04-08 00:00 | 23:18:41.73 | -12:25:44.7 | HIP 115119 | 16.30 |
| 2026-04-08 12:00 | 23:19:21.18 | -12:22:00.8 | HIP 115119 | 12.67 |
| 2026-04-09 00:00 | 23:20:00.55 | -12:18:17.3 | HIP 115119 | 16.39 |
| 2026-04-09 12:00 | 23:20:39.85 | -12:14:34.4 | HIP 115346 | 17.37 |
| 2026-04-10 00:00 | 23:21:19.07 | -12:10:51.9 | HIP 115346 | 9.32 |
| 2026-04-10 12:00 | 23:21:58.20 | -12:07:09.9 | HIP 115346 | 9.10 |
| 2026-04-11 00:00 | 23:22:37.26 | -12:03:28.4 | HIP 115346 | 16.98 |
| 2026-04-11 12:00 | 23:23:16.24 | -11:59:47.5 | HIP 115346 | 26.50 |
| 2026-04-12 00:00 | 23:23:55.13 | -11:56:07.0 | HIP 115346 | 36.38 |
| 2026-04-12 12:00 | 23:24:33.95 | -11:52:27.1 | HIP 115629 | 40.97 |
| 2026-04-13 00:00 | 23:25:12.68 | -11:48:47.8 | HIP 115657 | 40.39 |
| 2026-04-13 12:00 | 23:25:51.33 | -11:45:09.0 | HIP 115657 | 35.82 |
| 2026-04-14 00:00 | 23:26:29.90 | -11:41:30.7 | HIP 115839 | 27.48 |
| 2026-04-14 12:00 | 23:27:08.38 | -11:37:53.0 | HIP 115839 | 17.67 |
| 2026-04-15 00:00 | 23:27:46.78 | -11:34:15.9 | HIP 115839 | 8.56 |
| 2026-04-15 12:00 | 23:28:25.10 | -11:30:39.3 | HIP 115839 | 6.12 |
| 2026-04-16 00:00 | 23:29:03.33 | -11:27:03.3 | HIP 115839 | 14.26 |