C/1954 O2 (Baade)
メタデータ
| 項目 |
値 |
| Designation |
C/1954 O2 (Baade) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1955-08-13T07:51:21.994560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
35 |
| 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) |
1955-09-19.0000000 |
| e |
1.00055852 |
| q (au) |
3.869944 |
| a (au) |
-6928.925768 |
| i (deg) |
100.387736 |
| Ω (om, deg) |
265.340699 |
| ω (w, deg) |
144.674890 |
| M (ma, deg) |
0.000063 |
等級
散乱 + 全体線形
$$
M_a = (-0.462 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-0.462 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1955-09-09 |
1957-11-02 |
+4.8428 |
-3.023 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:30:36.57 |
-78:48:24.3 |
HIP 101137 |
6.21 |
| 2026-02-03 12:00 |
20:30:42.83 |
-78:48:24.0 |
HIP 101137 |
6.30 |
| 2026-02-04 00:00 |
20:30:49.09 |
-78:48:23.8 |
HIP 101137 |
6.40 |
| 2026-02-04 12:00 |
20:30:55.34 |
-78:48:23.8 |
HIP 101137 |
6.52 |
| 2026-02-05 00:00 |
20:31:01.58 |
-78:48:23.9 |
HIP 101137 |
6.64 |
| 2026-02-05 12:00 |
20:31:07.81 |
-78:48:24.2 |
HIP 101137 |
6.77 |
| 2026-02-06 00:00 |
20:31:14.02 |
-78:48:24.5 |
HIP 101137 |
6.91 |
| 2026-02-06 12:00 |
20:31:20.23 |
-78:48:25.1 |
HIP 101137 |
7.06 |
| 2026-02-07 00:00 |
20:31:26.43 |
-78:48:25.8 |
HIP 101137 |
7.22 |
| 2026-02-07 12:00 |
20:31:32.62 |
-78:48:26.6 |
HIP 101137 |
7.38 |
| 2026-02-08 00:00 |
20:31:38.79 |
-78:48:27.5 |
HIP 101137 |
7.55 |
| 2026-02-08 12:00 |
20:31:44.95 |
-78:48:28.6 |
HIP 101137 |
7.72 |
| 2026-02-09 00:00 |
20:31:51.10 |
-78:48:29.8 |
HIP 101137 |
7.90 |
| 2026-02-09 12:00 |
20:31:57.24 |
-78:48:31.2 |
HIP 101137 |
8.09 |
| 2026-02-10 00:00 |
20:32:03.36 |
-78:48:32.7 |
HIP 101137 |
8.27 |
| 2026-02-10 12:00 |
20:32:09.47 |
-78:48:34.4 |
HIP 101137 |
8.47 |
| 2026-02-11 00:00 |
20:32:15.56 |
-78:48:36.2 |
HIP 101137 |
8.66 |
| 2026-02-11 12:00 |
20:32:21.64 |
-78:48:38.1 |
HIP 101137 |
8.86 |
| 2026-02-12 00:00 |
20:32:27.71 |
-78:48:40.2 |
HIP 101137 |
9.07 |
| 2026-02-12 12:00 |
20:32:33.76 |
-78:48:42.4 |
HIP 101137 |
9.27 |
| 2026-02-13 00:00 |
20:32:39.79 |
-78:48:44.7 |
HIP 101137 |
9.48 |
| 2026-02-13 12:00 |
20:32:45.80 |
-78:48:47.2 |
HIP 101137 |
9.69 |
| 2026-02-14 00:00 |
20:32:51.80 |
-78:48:49.8 |
HIP 101137 |
9.90 |
| 2026-02-14 12:00 |
20:32:57.79 |
-78:48:52.6 |
HIP 101137 |
10.12 |
| 2026-02-15 00:00 |
20:33:03.75 |
-78:48:55.5 |
HIP 101137 |
10.34 |
| 2026-02-15 12:00 |
20:33:09.70 |
-78:48:58.5 |
HIP 101137 |
10.56 |
| 2026-02-16 00:00 |
20:33:15.63 |
-78:49:01.7 |
HIP 101137 |
10.78 |
| 2026-02-16 12:00 |
20:33:21.53 |
-78:49:05.0 |
HIP 101137 |
11.00 |
| 2026-02-17 00:00 |
20:33:27.42 |
-78:49:08.5 |
HIP 101137 |
11.22 |
| 2026-02-17 12:00 |
20:33:33.29 |
-78:49:12.1 |
HIP 101137 |
11.44 |
| 2026-02-18 00:00 |
20:33:39.14 |
-78:49:15.8 |
HIP 101137 |
11.67 |
| 2026-02-18 12:00 |
20:33:44.97 |
-78:49:19.7 |
HIP 101137 |
11.89 |
| 2026-02-19 00:00 |
20:33:50.78 |
-78:49:23.7 |
HIP 101137 |
12.12 |
| 2026-02-19 12:00 |
20:33:56.56 |
-78:49:27.8 |
HIP 101137 |
12.35 |
| 2026-02-20 00:00 |
20:34:02.33 |
-78:49:32.1 |
HIP 101137 |
12.57 |
| 2026-02-20 12:00 |
20:34:08.07 |
-78:49:36.5 |
HIP 101137 |
12.80 |
| 2026-02-21 00:00 |
20:34:13.79 |
-78:49:41.0 |
HIP 101137 |
13.03 |
| 2026-02-21 12:00 |
20:34:19.48 |
-78:49:45.7 |
HIP 101137 |
13.26 |
| 2026-02-22 00:00 |
20:34:25.15 |
-78:49:50.5 |
HIP 101137 |
13.49 |
| 2026-02-22 12:00 |
20:34:30.80 |
-78:49:55.5 |
HIP 101137 |
13.72 |
| 2026-02-23 00:00 |
20:34:36.42 |
-78:50:00.5 |
HIP 101137 |
13.95 |
| 2026-02-23 12:00 |
20:34:42.02 |
-78:50:05.7 |
HIP 101137 |
14.18 |
| 2026-02-24 00:00 |
20:34:47.59 |
-78:50:11.1 |
HIP 101137 |
14.41 |