C/1900 O1 (Borrelly-Brooks)
メタデータ
| 項目 |
値 |
| Designation |
C/1900 O1 (Borrelly-Brooks) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1900-08-03T16:49:18.926400Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:15Z |
| Obs used |
121 |
| 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) |
1900-08-15.0000000 |
| e |
1.00032171 |
| q (au) |
1.014834 |
| a (au) |
-3154.489395 |
| i (deg) |
62.532910 |
| Ω (om, deg) |
329.412543 |
| ω (w, deg) |
12.422902 |
| M (ma, deg) |
0.000063 |
等級
散乱 + 全体線形
$$
M_a = (8.587 + 4.390\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.587 |
| n |
4.390 |
| gf |
0.816 |
| gb |
-0.500 |
| k |
0.804 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
10:08:00.76 |
+09:04:12.1 |
HIP 49562 |
22.28 |
| 2026-02-03 12:00 |
10:07:59.98 |
+09:04:16.1 |
HIP 49562 |
22.22 |
| 2026-02-04 00:00 |
10:07:59.20 |
+09:04:20.2 |
HIP 49562 |
22.17 |
| 2026-02-04 12:00 |
10:07:58.42 |
+09:04:24.3 |
HIP 49562 |
22.11 |
| 2026-02-05 00:00 |
10:07:57.63 |
+09:04:28.4 |
HIP 49562 |
22.06 |
| 2026-02-05 12:00 |
10:07:56.85 |
+09:04:32.5 |
HIP 49562 |
22.01 |
| 2026-02-06 00:00 |
10:07:56.06 |
+09:04:36.6 |
HIP 49562 |
21.96 |
| 2026-02-06 12:00 |
10:07:55.27 |
+09:04:40.7 |
HIP 49562 |
21.92 |
| 2026-02-07 00:00 |
10:07:54.48 |
+09:04:44.9 |
HIP 49562 |
21.87 |
| 2026-02-07 12:00 |
10:07:53.69 |
+09:04:49.0 |
HIP 49562 |
21.83 |
| 2026-02-08 00:00 |
10:07:52.89 |
+09:04:53.2 |
HIP 49562 |
21.79 |
| 2026-02-08 12:00 |
10:07:52.10 |
+09:04:57.4 |
HIP 49562 |
21.75 |
| 2026-02-09 00:00 |
10:07:51.30 |
+09:05:01.6 |
HIP 49562 |
21.71 |
| 2026-02-09 12:00 |
10:07:50.51 |
+09:05:05.8 |
HIP 49562 |
21.67 |
| 2026-02-10 00:00 |
10:07:49.71 |
+09:05:10.0 |
HIP 49562 |
21.64 |
| 2026-02-10 12:00 |
10:07:48.91 |
+09:05:14.2 |
HIP 49562 |
21.61 |
| 2026-02-11 00:00 |
10:07:48.10 |
+09:05:18.5 |
HIP 49562 |
21.58 |
| 2026-02-11 12:00 |
10:07:47.30 |
+09:05:22.7 |
HIP 49562 |
21.55 |
| 2026-02-12 00:00 |
10:07:46.50 |
+09:05:27.0 |
HIP 49562 |
21.53 |
| 2026-02-12 12:00 |
10:07:45.70 |
+09:05:31.3 |
HIP 49562 |
21.50 |
| 2026-02-13 00:00 |
10:07:44.89 |
+09:05:35.5 |
HIP 49562 |
21.48 |
| 2026-02-13 12:00 |
10:07:44.08 |
+09:05:39.8 |
HIP 49562 |
21.46 |
| 2026-02-14 00:00 |
10:07:43.28 |
+09:05:44.1 |
HIP 49562 |
21.44 |
| 2026-02-14 12:00 |
10:07:42.47 |
+09:05:48.4 |
HIP 49562 |
21.43 |
| 2026-02-15 00:00 |
10:07:41.66 |
+09:05:52.7 |
HIP 49562 |
21.42 |
| 2026-02-15 12:00 |
10:07:40.86 |
+09:05:57.1 |
HIP 49562 |
21.41 |
| 2026-02-16 00:00 |
10:07:40.05 |
+09:06:01.4 |
HIP 49562 |
21.40 |
| 2026-02-16 12:00 |
10:07:39.24 |
+09:06:05.7 |
HIP 49562 |
21.39 |
| 2026-02-17 00:00 |
10:07:38.43 |
+09:06:10.1 |
HIP 49562 |
21.39 |
| 2026-02-17 12:00 |
10:07:37.62 |
+09:06:14.4 |
HIP 49562 |
21.39 |
| 2026-02-18 00:00 |
10:07:36.81 |
+09:06:18.8 |
HIP 49562 |
21.39 |
| 2026-02-18 12:00 |
10:07:36.00 |
+09:06:23.1 |
HIP 49562 |
21.39 |
| 2026-02-19 00:00 |
10:07:35.19 |
+09:06:27.5 |
HIP 49562 |
21.39 |
| 2026-02-19 12:00 |
10:07:34.38 |
+09:06:31.8 |
HIP 49562 |
21.40 |
| 2026-02-20 00:00 |
10:07:33.57 |
+09:06:36.2 |
HIP 49562 |
21.41 |
| 2026-02-20 12:00 |
10:07:32.76 |
+09:06:40.6 |
HIP 49562 |
21.42 |
| 2026-02-21 00:00 |
10:07:31.95 |
+09:06:45.0 |
HIP 49562 |
21.43 |
| 2026-02-21 12:00 |
10:07:31.14 |
+09:06:49.3 |
HIP 49562 |
21.45 |
| 2026-02-22 00:00 |
10:07:30.34 |
+09:06:53.7 |
HIP 49562 |
21.47 |
| 2026-02-22 12:00 |
10:07:29.53 |
+09:06:58.1 |
HIP 49562 |
21.49 |
| 2026-02-23 00:00 |
10:07:28.72 |
+09:07:02.5 |
HIP 49562 |
21.51 |
| 2026-02-23 12:00 |
10:07:27.91 |
+09:07:06.9 |
HIP 49562 |
21.53 |
| 2026-02-24 00:00 |
10:07:27.11 |
+09:07:11.3 |
HIP 49562 |
21.56 |