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) |
| 2026-05-12 00:00 |
20:35:42.10 |
-54:44:53.9 |
HIP 101636 |
11.93 |
| 2026-05-12 12:00 |
20:35:41.77 |
-54:45:01.4 |
HIP 101636 |
11.82 |
| 2026-05-13 00:00 |
20:35:41.41 |
-54:45:09.0 |
HIP 101636 |
11.71 |
| 2026-05-13 12:00 |
20:35:41.05 |
-54:45:16.6 |
HIP 101636 |
11.61 |
| 2026-05-14 00:00 |
20:35:40.68 |
-54:45:24.2 |
HIP 101636 |
11.50 |
| 2026-05-14 12:00 |
20:35:40.30 |
-54:45:31.8 |
HIP 101636 |
11.39 |
| 2026-05-15 00:00 |
20:35:39.90 |
-54:45:39.4 |
HIP 101636 |
11.29 |
| 2026-05-15 12:00 |
20:35:39.49 |
-54:45:47.0 |
HIP 101636 |
11.18 |
| 2026-05-16 00:00 |
20:35:39.08 |
-54:45:54.6 |
HIP 101636 |
11.08 |
| 2026-05-16 12:00 |
20:35:38.65 |
-54:46:02.3 |
HIP 101636 |
10.98 |
| 2026-05-17 00:00 |
20:35:38.21 |
-54:46:09.9 |
HIP 101636 |
10.88 |
| 2026-05-17 12:00 |
20:35:37.76 |
-54:46:17.5 |
HIP 101636 |
10.78 |
| 2026-05-18 00:00 |
20:35:37.29 |
-54:46:25.1 |
HIP 101636 |
10.68 |
| 2026-05-18 12:00 |
20:35:36.82 |
-54:46:32.7 |
HIP 101636 |
10.58 |
| 2026-05-19 00:00 |
20:35:36.34 |
-54:46:40.3 |
HIP 101636 |
10.49 |
| 2026-05-19 12:00 |
20:35:35.84 |
-54:46:47.9 |
HIP 101636 |
10.40 |
| 2026-05-20 00:00 |
20:35:35.34 |
-54:46:55.5 |
HIP 101636 |
10.31 |
| 2026-05-20 12:00 |
20:35:34.82 |
-54:47:03.1 |
HIP 101636 |
10.22 |
| 2026-05-21 00:00 |
20:35:34.29 |
-54:47:10.7 |
HIP 101636 |
10.13 |
| 2026-05-21 12:00 |
20:35:33.76 |
-54:47:18.3 |
HIP 101636 |
10.05 |
| 2026-05-22 00:00 |
20:35:33.21 |
-54:47:25.9 |
HIP 101636 |
9.96 |
| 2026-05-22 12:00 |
20:35:32.65 |
-54:47:33.5 |
HIP 101636 |
9.88 |
| 2026-05-23 00:00 |
20:35:32.08 |
-54:47:41.0 |
HIP 101636 |
9.81 |
| 2026-05-23 12:00 |
20:35:31.50 |
-54:47:48.6 |
HIP 101636 |
9.73 |
| 2026-05-24 00:00 |
20:35:30.91 |
-54:47:56.2 |
HIP 101636 |
9.66 |
| 2026-05-24 12:00 |
20:35:30.31 |
-54:48:03.7 |
HIP 101636 |
9.59 |
| 2026-05-25 00:00 |
20:35:29.70 |
-54:48:11.3 |
HIP 101636 |
9.52 |
| 2026-05-25 12:00 |
20:35:29.08 |
-54:48:18.8 |
HIP 101636 |
9.46 |
| 2026-05-26 00:00 |
20:35:28.44 |
-54:48:26.3 |
HIP 101636 |
9.39 |
| 2026-05-26 12:00 |
20:35:27.80 |
-54:48:33.8 |
HIP 101636 |
9.34 |
| 2026-05-27 00:00 |
20:35:27.15 |
-54:48:41.3 |
HIP 101636 |
9.28 |
| 2026-05-27 12:00 |
20:35:26.49 |
-54:48:48.8 |
HIP 101636 |
9.23 |
| 2026-05-28 00:00 |
20:35:25.82 |
-54:48:56.3 |
HIP 101636 |
9.18 |
| 2026-05-28 12:00 |
20:35:25.13 |
-54:49:03.8 |
HIP 101636 |
9.14 |
| 2026-05-29 00:00 |
20:35:24.44 |
-54:49:11.2 |
HIP 101636 |
9.10 |
| 2026-05-29 12:00 |
20:35:23.74 |
-54:49:18.7 |
HIP 101636 |
9.06 |
| 2026-05-30 00:00 |
20:35:23.03 |
-54:49:26.1 |
HIP 101636 |
9.02 |
| 2026-05-30 12:00 |
20:35:22.30 |
-54:49:33.5 |
HIP 101636 |
8.99 |
| 2026-05-31 00:00 |
20:35:21.57 |
-54:49:40.9 |
HIP 101636 |
8.97 |
| 2026-05-31 12:00 |
20:35:20.83 |
-54:49:48.3 |
HIP 101636 |
8.95 |
| 2026-06-01 00:00 |
20:35:20.08 |
-54:49:55.7 |
HIP 101636 |
8.93 |
| 2026-06-01 12:00 |
20:35:19.32 |
-54:50:03.0 |
HIP 101636 |
8.91 |
| 2026-06-02 00:00 |
20:35:18.55 |
-54:50:10.4 |
HIP 101636 |
8.90 |