C/1892 W1 (Brooks)
メタデータ
| 項目 |
値 |
| Designation |
C/1892 W1 (Brooks) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1893-01-06T23:50:26.018880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:53Z |
| Obs used |
17 |
| 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) |
1893-01-08.0000000 |
| e |
1.00000000 |
| q (au) |
1.195109 |
| a (au) |
- |
| i (deg) |
143.849490 |
| Ω (om, deg) |
187.141851 |
| ω (w, deg) |
85.212292 |
| M (ma, deg) |
- |
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 |
20:33:30.67 |
-54:31:36.5 |
HIP 101636 |
33.13 |
| 2026-02-03 12:00 |
20:33:32.01 |
-54:31:35.1 |
HIP 101636 |
33.02 |
| 2026-02-04 00:00 |
20:33:33.36 |
-54:31:33.7 |
HIP 101636 |
32.91 |
| 2026-02-04 12:00 |
20:33:34.70 |
-54:31:32.4 |
HIP 101636 |
32.80 |
| 2026-02-05 00:00 |
20:33:36.04 |
-54:31:31.2 |
HIP 101636 |
32.69 |
| 2026-02-05 12:00 |
20:33:37.38 |
-54:31:30.0 |
HIP 101636 |
32.58 |
| 2026-02-06 00:00 |
20:33:38.72 |
-54:31:28.9 |
HIP 101636 |
32.47 |
| 2026-02-06 12:00 |
20:33:40.06 |
-54:31:27.8 |
HIP 101636 |
32.36 |
| 2026-02-07 00:00 |
20:33:41.39 |
-54:31:26.8 |
HIP 101636 |
32.25 |
| 2026-02-07 12:00 |
20:33:42.72 |
-54:31:25.9 |
HIP 101636 |
32.14 |
| 2026-02-08 00:00 |
20:33:44.05 |
-54:31:25.1 |
HIP 101636 |
32.03 |
| 2026-02-08 12:00 |
20:33:45.38 |
-54:31:24.3 |
HIP 101636 |
31.92 |
| 2026-02-09 00:00 |
20:33:46.70 |
-54:31:23.6 |
HIP 101636 |
31.81 |
| 2026-02-09 12:00 |
20:33:48.02 |
-54:31:22.9 |
HIP 101636 |
31.71 |
| 2026-02-10 00:00 |
20:33:49.34 |
-54:31:22.3 |
HIP 101636 |
31.60 |
| 2026-02-10 12:00 |
20:33:50.65 |
-54:31:21.8 |
HIP 101636 |
31.49 |
| 2026-02-11 00:00 |
20:33:51.96 |
-54:31:21.3 |
HIP 101636 |
31.38 |
| 2026-02-11 12:00 |
20:33:53.27 |
-54:31:20.9 |
HIP 101636 |
31.27 |
| 2026-02-12 00:00 |
20:33:54.57 |
-54:31:20.6 |
HIP 101636 |
31.17 |
| 2026-02-12 12:00 |
20:33:55.88 |
-54:31:20.3 |
HIP 101636 |
31.06 |
| 2026-02-13 00:00 |
20:33:57.17 |
-54:31:20.1 |
HIP 101636 |
30.95 |
| 2026-02-13 12:00 |
20:33:58.47 |
-54:31:20.0 |
HIP 101636 |
30.85 |
| 2026-02-14 00:00 |
20:33:59.76 |
-54:31:19.9 |
HIP 101636 |
30.74 |
| 2026-02-14 12:00 |
20:34:01.05 |
-54:31:19.9 |
HIP 101636 |
30.63 |
| 2026-02-15 00:00 |
20:34:02.33 |
-54:31:20.0 |
HIP 101636 |
30.53 |
| 2026-02-15 12:00 |
20:34:03.61 |
-54:31:20.1 |
HIP 101636 |
30.42 |
| 2026-02-16 00:00 |
20:34:04.88 |
-54:31:20.3 |
HIP 101636 |
30.31 |
| 2026-02-16 12:00 |
20:34:06.15 |
-54:31:20.6 |
HIP 101636 |
30.21 |
| 2026-02-17 00:00 |
20:34:07.42 |
-54:31:20.9 |
HIP 101636 |
30.10 |
| 2026-02-17 12:00 |
20:34:08.68 |
-54:31:21.3 |
HIP 101636 |
30.00 |
| 2026-02-18 00:00 |
20:34:09.94 |
-54:31:21.8 |
HIP 101636 |
29.89 |
| 2026-02-18 12:00 |
20:34:11.19 |
-54:31:22.3 |
HIP 101636 |
29.79 |
| 2026-02-19 00:00 |
20:34:12.44 |
-54:31:22.9 |
HIP 101636 |
29.68 |
| 2026-02-19 12:00 |
20:34:13.69 |
-54:31:23.5 |
HIP 101636 |
29.58 |
| 2026-02-20 00:00 |
20:34:14.92 |
-54:31:24.2 |
HIP 101636 |
29.47 |
| 2026-02-20 12:00 |
20:34:16.16 |
-54:31:25.0 |
HIP 101636 |
29.37 |
| 2026-02-21 00:00 |
20:34:17.39 |
-54:31:25.9 |
HIP 101636 |
29.26 |
| 2026-02-21 12:00 |
20:34:18.61 |
-54:31:26.8 |
HIP 101636 |
29.16 |
| 2026-02-22 00:00 |
20:34:19.83 |
-54:31:27.8 |
HIP 101636 |
29.06 |
| 2026-02-22 12:00 |
20:34:21.04 |
-54:31:28.8 |
HIP 101636 |
28.95 |
| 2026-02-23 00:00 |
20:34:22.25 |
-54:31:29.9 |
HIP 101636 |
28.85 |
| 2026-02-23 12:00 |
20:34:23.45 |
-54:31:31.1 |
HIP 101636 |
28.75 |
| 2026-02-24 00:00 |
20:34:24.65 |
-54:31:32.3 |
HIP 101636 |
28.64 |