C/1957 P1 (Mrkos)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1957 P1 (Mrkos) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1957-08-01T10:26:12.068160Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:14Z |
| Obs used | 16 |
| NEO | - |
| M1 | - |
| K1 | - |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 1958-03-10.0000000 |
| e | 0.99933801 |
| q (au) | 0.354936 |
| a (au) | 536.161864 |
| i (deg) | 93.956740 |
| Ω (om, deg) | 68.323840 |
| ω (w, deg) | 40.318515 |
| M (ma, deg) | 0.017510 |
等級
散乱 + 全体線形
$$ M_a = (4.429 + 3.219\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 4.429 |
| n | 3.219 |
| gf | 0.800 |
| gb | -0.500 |
| k | 0.800 |
| δ90 | 1.000 |
| 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 |
|---|---|---|---|
| 1957-08-02 | 1957-09-16 | -1.5729 | -0.263 |
| 1957-09-16 | 1958-07-09 | +11.5497 | -1.367 |
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) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 15:35:28.42 | -54:13:23.6 | HIP 76497 | 19.14 |
| 2026-06-01 12:00 | 15:35:26.33 | -54:13:17.5 | HIP 76497 | 19.46 |
| 2026-06-02 00:00 | 15:35:24.24 | -54:13:11.4 | HIP 76497 | 19.78 |
| 2026-06-02 12:00 | 15:35:22.16 | -54:13:05.1 | HIP 76497 | 20.10 |
| 2026-06-03 00:00 | 15:35:20.09 | -54:12:58.8 | HIP 76497 | 20.42 |
| 2026-06-03 12:00 | 15:35:18.02 | -54:12:52.3 | HIP 76497 | 20.74 |
| 2026-06-04 00:00 | 15:35:15.96 | -54:12:45.8 | HIP 76497 | 21.06 |
| 2026-06-04 12:00 | 15:35:13.90 | -54:12:39.2 | HIP 76497 | 21.38 |
| 2026-06-05 00:00 | 15:35:11.84 | -54:12:32.6 | HIP 76497 | 21.69 |
| 2026-06-05 12:00 | 15:35:09.80 | -54:12:25.8 | HIP 76497 | 22.01 |
| 2026-06-06 00:00 | 15:35:07.75 | -54:12:19.0 | HIP 76497 | 22.33 |
| 2026-06-06 12:00 | 15:35:05.72 | -54:12:12.1 | HIP 76497 | 22.65 |
| 2026-06-07 00:00 | 15:35:03.69 | -54:12:05.1 | HIP 76497 | 22.97 |
| 2026-06-07 12:00 | 15:35:01.67 | -54:11:58.0 | HIP 76497 | 23.28 |
| 2026-06-08 00:00 | 15:34:59.65 | -54:11:50.9 | HIP 76497 | 23.60 |
| 2026-06-08 12:00 | 15:34:57.64 | -54:11:43.6 | HIP 76497 | 23.92 |
| 2026-06-09 00:00 | 15:34:55.64 | -54:11:36.3 | HIP 76497 | 24.24 |
| 2026-06-09 12:00 | 15:34:53.64 | -54:11:28.9 | HIP 76497 | 24.55 |
| 2026-06-10 00:00 | 15:34:51.65 | -54:11:21.5 | HIP 76497 | 24.87 |
| 2026-06-10 12:00 | 15:34:49.67 | -54:11:13.9 | HIP 76497 | 25.19 |
| 2026-06-11 00:00 | 15:34:47.70 | -54:11:06.3 | HIP 76497 | 25.50 |
| 2026-06-11 12:00 | 15:34:45.73 | -54:10:58.6 | HIP 76497 | 25.82 |
| 2026-06-12 00:00 | 15:34:43.77 | -54:10:50.8 | HIP 76497 | 26.13 |
| 2026-06-12 12:00 | 15:34:41.82 | -54:10:43.0 | HIP 76497 | 26.44 |
| 2026-06-13 00:00 | 15:34:39.88 | -54:10:35.1 | HIP 76497 | 26.76 |
| 2026-06-13 12:00 | 15:34:37.94 | -54:10:27.1 | HIP 76497 | 27.07 |
| 2026-06-14 00:00 | 15:34:36.01 | -54:10:19.1 | HIP 76497 | 27.38 |
| 2026-06-14 12:00 | 15:34:34.09 | -54:10:10.9 | HIP 76497 | 27.69 |
| 2026-06-15 00:00 | 15:34:32.19 | -54:10:02.7 | HIP 76497 | 28.01 |
| 2026-06-15 12:00 | 15:34:30.28 | -54:09:54.5 | HIP 76497 | 28.32 |
| 2026-06-16 00:00 | 15:34:28.39 | -54:09:46.1 | HIP 76497 | 28.63 |
| 2026-06-16 12:00 | 15:34:26.51 | -54:09:37.7 | HIP 76497 | 28.93 |
| 2026-06-17 00:00 | 15:34:24.64 | -54:09:29.2 | HIP 76497 | 29.24 |
| 2026-06-17 12:00 | 15:34:22.77 | -54:09:20.7 | HIP 76497 | 29.55 |
| 2026-06-18 00:00 | 15:34:20.92 | -54:09:12.1 | HIP 76497 | 29.86 |
| 2026-06-18 12:00 | 15:34:19.07 | -54:09:03.4 | HIP 76497 | 30.16 |
| 2026-06-19 00:00 | 15:34:17.24 | -54:08:54.7 | HIP 76497 | 30.47 |
| 2026-06-19 12:00 | 15:34:15.41 | -54:08:45.9 | HIP 76497 | 30.77 |
| 2026-06-20 00:00 | 15:34:13.60 | -54:08:37.0 | HIP 76497 | 31.08 |
| 2026-06-20 12:00 | 15:34:11.79 | -54:08:28.1 | HIP 76497 | 31.38 |
| 2026-06-21 00:00 | 15:34:10.00 | -54:08:19.1 | HIP 76497 | 31.68 |
| 2026-06-21 12:00 | 15:34:08.21 | -54:08:10.0 | HIP 76497 | 31.98 |
| 2026-06-22 00:00 | 15:34:06.44 | -54:08:00.9 | HIP 76497 | 32.28 |