C/2014 Q1 (PANSTARRS)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2014 Q1 (PANSTARRS) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2015-07-06T12:15:56.439360Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:32:58Z |
| Obs used | 704 |
| NEO | - |
| M1 | 9.700 |
| K1 | 7.250 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2015-02-17.0000000 |
| e | 0.99972226 |
| q (au) | 0.314572 |
| a (au) | 1132.604359 |
| i (deg) | 43.106721 |
| Ω (om, deg) | 8.762539 |
| ω (w, deg) | 120.050113 |
| M (ma, deg) | 359.996393 |
等級
散乱 + 全体線形
$$ M_a = (11.191 + 3.199\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 11.191 |
| n | 3.199 |
| gf | 0.996 |
| gb | -0.807 |
| k | 0.944 |
| δ90 | 9.807 |
| パラメータ | 記号 | 範囲 | 説明 |
|---|---|---|---|
| 太陽・地球距離が1 AUのときの絶対等級 | H0 | -5 to 20 | 彗星の固有の明るさ |
| 測光スロープパラメータ | n | 2 to 6 | 太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 | gf |
0.8 to 1 | 前方散乱の強さ |
| 後方散乱非対称係数 | gb |
-1 to -0.5 | 後方散乱の強さ |
| 分配係数 | k | 0.8 to 1 | 前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 | δ90 | 1 to 10 | ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) | 終了日 (UTC) | a | b |
|---|---|---|---|
| 2014-08-16 | 2015-01-14 | +6.2752 | -4.022 |
| 2015-01-14 | 2015-06-22 | +1.0263 | -1.086 |
| 2015-07-06 | 2015-08-05 | +6.6394 | -2.106 |
| 2015-08-05 | 2015-08-20 | +8.7741 | -1.094 |
| 2015-08-20 | 2016-05-13 | +2.6006 | -0.134 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 21:34:57.44 | -57:06:07.5 | HIP 106624 | 7.49 |
| 2026-03-26 12:00 | 21:35:03.10 | -57:06:25.5 | HIP 106624 | 6.67 |
| 2026-03-27 00:00 | 21:35:08.73 | -57:06:43.9 | HIP 106624 | 5.85 |
| 2026-03-27 12:00 | 21:35:14.31 | -57:07:02.7 | HIP 106624 | 5.04 |
| 2026-03-28 00:00 | 21:35:19.84 | -57:07:21.8 | HIP 106624 | 4.22 |
| 2026-03-28 12:00 | 21:35:25.34 | -57:07:41.2 | HIP 106624 | 3.42 |
| 2026-03-29 00:00 | 21:35:30.79 | -57:08:01.0 | HIP 106624 | 2.61 |
| 2026-03-29 12:00 | 21:35:36.19 | -57:08:21.2 | HIP 106624 | 1.82 |
| 2026-03-30 00:00 | 21:35:41.55 | -57:08:41.6 | HIP 106624 | 1.04 |
| 2026-03-30 12:00 | 21:35:46.87 | -57:09:02.5 | HIP 106624 | 0.37 |
| 2026-03-31 00:00 | 21:35:52.14 | -57:09:23.6 | HIP 106624 | 0.69 |
| 2026-03-31 12:00 | 21:35:57.36 | -57:09:45.2 | HIP 106624 | 1.44 |
| 2026-04-01 00:00 | 21:36:02.54 | -57:10:07.0 | HIP 106624 | 2.21 |
| 2026-04-01 12:00 | 21:36:07.67 | -57:10:29.2 | HIP 106624 | 2.99 |
| 2026-04-02 00:00 | 21:36:12.76 | -57:10:51.8 | HIP 106624 | 3.77 |
| 2026-04-02 12:00 | 21:36:17.80 | -57:11:14.6 | HIP 106624 | 4.55 |
| 2026-04-03 00:00 | 21:36:22.79 | -57:11:37.8 | HIP 106624 | 5.33 |
| 2026-04-03 12:00 | 21:36:27.74 | -57:12:01.4 | HIP 106624 | 6.10 |
| 2026-04-04 00:00 | 21:36:32.63 | -57:12:25.3 | HIP 106624 | 6.87 |
| 2026-04-04 12:00 | 21:36:37.48 | -57:12:49.5 | HIP 106624 | 7.64 |
| 2026-04-05 00:00 | 21:36:42.28 | -57:13:14.0 | HIP 106624 | 8.40 |
| 2026-04-05 12:00 | 21:36:47.03 | -57:13:38.9 | HIP 106624 | 9.16 |
| 2026-04-06 00:00 | 21:36:51.74 | -57:14:04.1 | HIP 106624 | 9.92 |
| 2026-04-06 12:00 | 21:36:56.39 | -57:14:29.6 | HIP 106624 | 10.68 |
| 2026-04-07 00:00 | 21:37:00.99 | -57:14:55.5 | HIP 106624 | 11.43 |
| 2026-04-07 12:00 | 21:37:05.54 | -57:15:21.7 | HIP 106624 | 12.18 |
| 2026-04-08 00:00 | 21:37:10.05 | -57:15:48.2 | HIP 106624 | 12.93 |
| 2026-04-08 12:00 | 21:37:14.50 | -57:16:15.0 | HIP 106624 | 13.67 |
| 2026-04-09 00:00 | 21:37:18.90 | -57:16:42.1 | HIP 106624 | 14.41 |
| 2026-04-09 12:00 | 21:37:23.25 | -57:17:09.6 | HIP 106624 | 15.15 |
| 2026-04-10 00:00 | 21:37:27.55 | -57:17:37.4 | HIP 106624 | 15.89 |
| 2026-04-10 12:00 | 21:37:31.79 | -57:18:05.5 | HIP 106624 | 16.62 |
| 2026-04-11 00:00 | 21:37:35.99 | -57:18:33.9 | HIP 106624 | 17.35 |
| 2026-04-11 12:00 | 21:37:40.13 | -57:19:02.6 | HIP 106624 | 18.08 |
| 2026-04-12 00:00 | 21:37:44.22 | -57:19:31.6 | HIP 106624 | 18.80 |
| 2026-04-12 12:00 | 21:37:48.25 | -57:20:01.0 | HIP 106624 | 19.52 |
| 2026-04-13 00:00 | 21:37:52.23 | -57:20:30.6 | HIP 106986 | 18.92 |
| 2026-04-13 12:00 | 21:37:56.16 | -57:21:00.6 | HIP 106986 | 18.26 |
| 2026-04-14 00:00 | 21:38:00.03 | -57:21:30.8 | HIP 106986 | 17.61 |
| 2026-04-14 12:00 | 21:38:03.85 | -57:22:01.4 | HIP 106986 | 16.98 |
| 2026-04-15 00:00 | 21:38:07.61 | -57:22:32.3 | HIP 106986 | 16.35 |
| 2026-04-15 12:00 | 21:38:11.32 | -57:23:03.4 | HIP 106986 | 15.75 |
| 2026-04-16 00:00 | 21:38:14.97 | -57:23:34.9 | HIP 106986 | 15.15 |