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) |
| 2026-03-26 00:00 |
20:35:23.20 |
-54:34:38.6 |
HIP 101636 |
22.55 |
| 2026-03-26 12:00 |
20:35:23.91 |
-54:34:43.4 |
HIP 101636 |
22.44 |
| 2026-03-27 00:00 |
20:35:24.61 |
-54:34:48.3 |
HIP 101636 |
22.34 |
| 2026-03-27 12:00 |
20:35:25.30 |
-54:34:53.2 |
HIP 101636 |
22.24 |
| 2026-03-28 00:00 |
20:35:25.98 |
-54:34:58.2 |
HIP 101636 |
22.13 |
| 2026-03-28 12:00 |
20:35:26.65 |
-54:35:03.2 |
HIP 101636 |
22.03 |
| 2026-03-29 00:00 |
20:35:27.31 |
-54:35:08.3 |
HIP 101636 |
21.92 |
| 2026-03-29 12:00 |
20:35:27.96 |
-54:35:13.4 |
HIP 101636 |
21.82 |
| 2026-03-30 00:00 |
20:35:28.60 |
-54:35:18.6 |
HIP 101636 |
21.71 |
| 2026-03-30 12:00 |
20:35:29.22 |
-54:35:23.8 |
HIP 101636 |
21.61 |
| 2026-03-31 00:00 |
20:35:29.84 |
-54:35:29.1 |
HIP 101636 |
21.50 |
| 2026-03-31 12:00 |
20:35:30.45 |
-54:35:34.4 |
HIP 101636 |
21.40 |
| 2026-04-01 00:00 |
20:35:31.05 |
-54:35:39.7 |
HIP 101636 |
21.29 |
| 2026-04-01 12:00 |
20:35:31.64 |
-54:35:45.1 |
HIP 101636 |
21.19 |
| 2026-04-02 00:00 |
20:35:32.21 |
-54:35:50.6 |
HIP 101636 |
21.08 |
| 2026-04-02 12:00 |
20:35:32.78 |
-54:35:56.1 |
HIP 101636 |
20.98 |
| 2026-04-03 00:00 |
20:35:33.34 |
-54:36:01.6 |
HIP 101636 |
20.87 |
| 2026-04-03 12:00 |
20:35:33.88 |
-54:36:07.2 |
HIP 101636 |
20.76 |
| 2026-04-04 00:00 |
20:35:34.42 |
-54:36:12.8 |
HIP 101636 |
20.65 |
| 2026-04-04 12:00 |
20:35:34.94 |
-54:36:18.5 |
HIP 101636 |
20.55 |
| 2026-04-05 00:00 |
20:35:35.46 |
-54:36:24.2 |
HIP 101636 |
20.44 |
| 2026-04-05 12:00 |
20:35:35.96 |
-54:36:29.9 |
HIP 101636 |
20.33 |
| 2026-04-06 00:00 |
20:35:36.45 |
-54:36:35.7 |
HIP 101636 |
20.22 |
| 2026-04-06 12:00 |
20:35:36.93 |
-54:36:41.5 |
HIP 101636 |
20.12 |
| 2026-04-07 00:00 |
20:35:37.40 |
-54:36:47.4 |
HIP 101636 |
20.01 |
| 2026-04-07 12:00 |
20:35:37.86 |
-54:36:53.3 |
HIP 101636 |
19.90 |
| 2026-04-08 00:00 |
20:35:38.31 |
-54:36:59.3 |
HIP 101636 |
19.79 |
| 2026-04-08 12:00 |
20:35:38.75 |
-54:37:05.3 |
HIP 101636 |
19.68 |
| 2026-04-09 00:00 |
20:35:39.17 |
-54:37:11.3 |
HIP 101636 |
19.57 |
| 2026-04-09 12:00 |
20:35:39.59 |
-54:37:17.4 |
HIP 101636 |
19.46 |
| 2026-04-10 00:00 |
20:35:39.99 |
-54:37:23.5 |
HIP 101636 |
19.35 |
| 2026-04-10 12:00 |
20:35:40.39 |
-54:37:29.7 |
HIP 101636 |
19.24 |
| 2026-04-11 00:00 |
20:35:40.77 |
-54:37:35.9 |
HIP 101636 |
19.13 |
| 2026-04-11 12:00 |
20:35:41.14 |
-54:37:42.1 |
HIP 101636 |
19.02 |
| 2026-04-12 00:00 |
20:35:41.50 |
-54:37:48.4 |
HIP 101636 |
18.91 |
| 2026-04-12 12:00 |
20:35:41.85 |
-54:37:54.7 |
HIP 101636 |
18.79 |
| 2026-04-13 00:00 |
20:35:42.19 |
-54:38:01.0 |
HIP 101636 |
18.68 |
| 2026-04-13 12:00 |
20:35:42.51 |
-54:38:07.4 |
HIP 101636 |
18.57 |
| 2026-04-14 00:00 |
20:35:42.83 |
-54:38:13.8 |
HIP 101636 |
18.46 |
| 2026-04-14 12:00 |
20:35:43.13 |
-54:38:20.3 |
HIP 101636 |
18.34 |
| 2026-04-15 00:00 |
20:35:43.42 |
-54:38:26.8 |
HIP 101636 |
18.23 |
| 2026-04-15 12:00 |
20:35:43.71 |
-54:38:33.3 |
HIP 101636 |
18.12 |
| 2026-04-16 00:00 |
20:35:43.98 |
-54:38:39.8 |
HIP 101636 |
18.00 |