C/1954 Y1 (Haro-Chavira)
メタデータ
| 項目 |
値 |
| Designation |
C/1954 Y1 (Haro-Chavira) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1956-01-26T17:36:40.613760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
57 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1956-08-14.0000000 |
| e |
1.00460292 |
| q (au) |
4.076984 |
| a (au) |
-885.738904 |
| i (deg) |
79.600837 |
| Ω (om, deg) |
72.875012 |
| ω (w, deg) |
57.309578 |
| M (ma, deg) |
0.007488 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
17:00:46.25 |
-54:55:00.5 |
HIP 83201 |
12.27 |
| 2026-02-03 12:00 |
17:00:47.47 |
-54:55:10.7 |
HIP 83201 |
12.18 |
| 2026-02-04 00:00 |
17:00:48.68 |
-54:55:21.0 |
HIP 83201 |
12.09 |
| 2026-02-04 12:00 |
17:00:49.87 |
-54:55:31.3 |
HIP 83201 |
12.01 |
| 2026-02-05 00:00 |
17:00:51.04 |
-54:55:41.6 |
HIP 83201 |
11.93 |
| 2026-02-05 12:00 |
17:00:52.20 |
-54:55:52.0 |
HIP 83201 |
11.85 |
| 2026-02-06 00:00 |
17:00:53.33 |
-54:56:02.4 |
HIP 83201 |
11.77 |
| 2026-02-06 12:00 |
17:00:54.46 |
-54:56:12.8 |
HIP 83201 |
11.70 |
| 2026-02-07 00:00 |
17:00:55.56 |
-54:56:23.3 |
HIP 83201 |
11.63 |
| 2026-02-07 12:00 |
17:00:56.65 |
-54:56:33.7 |
HIP 83201 |
11.56 |
| 2026-02-08 00:00 |
17:00:57.72 |
-54:56:44.3 |
HIP 83201 |
11.50 |
| 2026-02-08 12:00 |
17:00:58.78 |
-54:56:54.8 |
HIP 83201 |
11.44 |
| 2026-02-09 00:00 |
17:00:59.82 |
-54:57:05.4 |
HIP 83201 |
11.38 |
| 2026-02-09 12:00 |
17:01:00.84 |
-54:57:16.0 |
HIP 83201 |
11.32 |
| 2026-02-10 00:00 |
17:01:01.84 |
-54:57:26.7 |
HIP 83201 |
11.26 |
| 2026-02-10 12:00 |
17:01:02.83 |
-54:57:37.3 |
HIP 83201 |
11.21 |
| 2026-02-11 00:00 |
17:01:03.79 |
-54:57:48.0 |
HIP 83201 |
11.16 |
| 2026-02-11 12:00 |
17:01:04.74 |
-54:57:58.8 |
HIP 83201 |
11.11 |
| 2026-02-12 00:00 |
17:01:05.68 |
-54:58:09.5 |
HIP 83201 |
11.07 |
| 2026-02-12 12:00 |
17:01:06.59 |
-54:58:20.3 |
HIP 83201 |
11.03 |
| 2026-02-13 00:00 |
17:01:07.49 |
-54:58:31.1 |
HIP 83201 |
10.99 |
| 2026-02-13 12:00 |
17:01:08.37 |
-54:58:41.9 |
HIP 83201 |
10.95 |
| 2026-02-14 00:00 |
17:01:09.23 |
-54:58:52.7 |
HIP 83201 |
10.91 |
| 2026-02-14 12:00 |
17:01:10.07 |
-54:59:03.6 |
HIP 83201 |
10.88 |
| 2026-02-15 00:00 |
17:01:10.90 |
-54:59:14.5 |
HIP 83201 |
10.84 |
| 2026-02-15 12:00 |
17:01:11.71 |
-54:59:25.4 |
HIP 83201 |
10.81 |
| 2026-02-16 00:00 |
17:01:12.50 |
-54:59:36.3 |
HIP 83201 |
10.79 |
| 2026-02-16 12:00 |
17:01:13.27 |
-54:59:47.2 |
HIP 83201 |
10.76 |
| 2026-02-17 00:00 |
17:01:14.02 |
-54:59:58.2 |
HIP 83201 |
10.74 |
| 2026-02-17 12:00 |
17:01:14.75 |
-55:00:09.1 |
HIP 83201 |
10.71 |
| 2026-02-18 00:00 |
17:01:15.47 |
-55:00:20.1 |
HIP 83201 |
10.69 |
| 2026-02-18 12:00 |
17:01:16.16 |
-55:00:31.1 |
HIP 83201 |
10.67 |
| 2026-02-19 00:00 |
17:01:16.84 |
-55:00:42.1 |
HIP 83201 |
10.66 |
| 2026-02-19 12:00 |
17:01:17.50 |
-55:00:53.1 |
HIP 83201 |
10.64 |
| 2026-02-20 00:00 |
17:01:18.14 |
-55:01:04.2 |
HIP 83201 |
10.63 |
| 2026-02-20 12:00 |
17:01:18.76 |
-55:01:15.2 |
HIP 83201 |
10.61 |
| 2026-02-21 00:00 |
17:01:19.37 |
-55:01:26.3 |
HIP 83201 |
10.60 |
| 2026-02-21 12:00 |
17:01:19.95 |
-55:01:37.3 |
HIP 83201 |
10.59 |
| 2026-02-22 00:00 |
17:01:20.51 |
-55:01:48.4 |
HIP 83201 |
10.58 |
| 2026-02-22 12:00 |
17:01:21.06 |
-55:01:59.5 |
HIP 83387 |
10.56 |
| 2026-02-23 00:00 |
17:01:21.59 |
-55:02:10.6 |
HIP 83387 |
10.45 |
| 2026-02-23 12:00 |
17:01:22.09 |
-55:02:21.7 |
HIP 83387 |
10.34 |
| 2026-02-24 00:00 |
17:01:22.58 |
-55:02:32.8 |
HIP 83387 |
10.24 |