メタデータ
| 項目 |
値 |
| Designation |
C/1955 O1 (Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1955-08-04T01:29:30.019200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
43 |
| 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) |
1955-09-09.0000000 |
| e |
1.00111104 |
| q (au) |
0.884615 |
| a (au) |
-796.204707 |
| i (deg) |
107.523427 |
| Ω (om, deg) |
339.422185 |
| ω (w, deg) |
348.195749 |
| M (ma, deg) |
0.001577 |
等級
散乱 + 全体線形
$$
M_a = (8.055 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.055 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.520 |
| k |
0.800 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1955-08-06 |
1955-09-03 |
-19.9934 |
+0.158 |
| 1955-09-03 |
1955-11-23 |
+9.5187 |
-1.437 |
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) |
| 2026-07-29 00:00 |
11:45:48.55 |
+25:16:53.0 |
HIP 57351 |
10.92 |
| 2026-07-29 12:00 |
11:45:49.32 |
+25:16:43.1 |
HIP 57351 |
10.83 |
| 2026-07-30 00:00 |
11:45:50.10 |
+25:16:33.1 |
HIP 57351 |
10.74 |
| 2026-07-30 12:00 |
11:45:50.89 |
+25:16:23.2 |
HIP 57351 |
10.66 |
| 2026-07-31 00:00 |
11:45:51.69 |
+25:16:13.2 |
HIP 57351 |
10.59 |
| 2026-07-31 12:00 |
11:45:52.49 |
+25:16:03.2 |
HIP 57351 |
10.52 |
| 2026-08-01 00:00 |
11:45:53.31 |
+25:15:53.3 |
HIP 57351 |
10.45 |
| 2026-08-01 12:00 |
11:45:54.12 |
+25:15:43.3 |
HIP 57351 |
10.40 |
| 2026-08-02 00:00 |
11:45:54.95 |
+25:15:33.3 |
HIP 57351 |
10.35 |
| 2026-08-02 12:00 |
11:45:55.79 |
+25:15:23.4 |
HIP 57351 |
10.31 |
| 2026-08-03 00:00 |
11:45:56.63 |
+25:15:13.4 |
HIP 57351 |
10.27 |
| 2026-08-03 12:00 |
11:45:57.48 |
+25:15:03.5 |
HIP 57351 |
10.24 |
| 2026-08-04 00:00 |
11:45:58.33 |
+25:14:53.5 |
HIP 57351 |
10.22 |
| 2026-08-04 12:00 |
11:45:59.20 |
+25:14:43.6 |
HIP 57351 |
10.20 |
| 2026-08-05 00:00 |
11:46:00.07 |
+25:14:33.6 |
HIP 57351 |
10.20 |
| 2026-08-05 12:00 |
11:46:00.94 |
+25:14:23.7 |
HIP 57351 |
10.20 |
| 2026-08-06 00:00 |
11:46:01.83 |
+25:14:13.8 |
HIP 57351 |
10.21 |
| 2026-08-06 12:00 |
11:46:02.72 |
+25:14:03.8 |
HIP 57351 |
10.22 |
| 2026-08-07 00:00 |
11:46:03.62 |
+25:13:53.9 |
HIP 57351 |
10.25 |
| 2026-08-07 12:00 |
11:46:04.52 |
+25:13:44.0 |
HIP 57351 |
10.28 |
| 2026-08-08 00:00 |
11:46:05.44 |
+25:13:34.1 |
HIP 57351 |
10.32 |
| 2026-08-08 12:00 |
11:46:06.35 |
+25:13:24.2 |
HIP 57351 |
10.37 |
| 2026-08-09 00:00 |
11:46:07.28 |
+25:13:14.4 |
HIP 57351 |
10.42 |
| 2026-08-09 12:00 |
11:46:08.21 |
+25:13:04.5 |
HIP 57351 |
10.49 |
| 2026-08-10 00:00 |
11:46:09.15 |
+25:12:54.7 |
HIP 57351 |
10.56 |
| 2026-08-10 12:00 |
11:46:10.10 |
+25:12:44.8 |
HIP 57351 |
10.63 |
| 2026-08-11 00:00 |
11:46:11.05 |
+25:12:35.0 |
HIP 57351 |
10.72 |
| 2026-08-11 12:00 |
11:46:12.00 |
+25:12:25.2 |
HIP 57351 |
10.81 |
| 2026-08-12 00:00 |
11:46:12.97 |
+25:12:15.4 |
HIP 57351 |
10.92 |
| 2026-08-12 12:00 |
11:46:13.94 |
+25:12:05.6 |
HIP 57351 |
11.02 |
| 2026-08-13 00:00 |
11:46:14.91 |
+25:11:55.8 |
HIP 57351 |
11.14 |
| 2026-08-13 12:00 |
11:46:15.90 |
+25:11:46.1 |
HIP 57351 |
11.26 |
| 2026-08-14 00:00 |
11:46:16.89 |
+25:11:36.4 |
HIP 57351 |
11.39 |
| 2026-08-14 12:00 |
11:46:17.88 |
+25:11:26.7 |
HIP 57351 |
11.52 |
| 2026-08-15 00:00 |
11:46:18.88 |
+25:11:17.0 |
HIP 57351 |
11.67 |
| 2026-08-15 12:00 |
11:46:19.88 |
+25:11:07.3 |
HIP 57351 |
11.81 |
| 2026-08-16 00:00 |
11:46:20.90 |
+25:10:57.7 |
HIP 57351 |
11.97 |
| 2026-08-16 12:00 |
11:46:21.91 |
+25:10:48.0 |
HIP 57351 |
12.13 |
| 2026-08-17 00:00 |
11:46:22.94 |
+25:10:38.4 |
HIP 57351 |
12.29 |
| 2026-08-17 12:00 |
11:46:23.96 |
+25:10:28.9 |
HIP 57351 |
12.46 |
| 2026-08-18 00:00 |
11:46:25.00 |
+25:10:19.3 |
HIP 57351 |
12.64 |
| 2026-08-18 12:00 |
11:46:26.04 |
+25:10:09.8 |
HIP 57351 |
12.82 |
| 2026-08-19 00:00 |
11:46:27.08 |
+25:10:00.3 |
HIP 57351 |
13.01 |