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) |
| 2026-05-12 00:00 |
11:45:44.35 |
+25:35:41.7 |
HIP 57265 |
15.80 |
| 2026-05-12 12:00 |
11:45:43.61 |
+25:35:39.3 |
HIP 57265 |
15.62 |
| 2026-05-13 00:00 |
11:45:42.87 |
+25:35:36.8 |
HIP 57265 |
15.45 |
| 2026-05-13 12:00 |
11:45:42.15 |
+25:35:34.2 |
HIP 57265 |
15.29 |
| 2026-05-14 00:00 |
11:45:41.44 |
+25:35:31.6 |
HIP 57265 |
15.12 |
| 2026-05-14 12:00 |
11:45:40.74 |
+25:35:28.9 |
HIP 57265 |
14.95 |
| 2026-05-15 00:00 |
11:45:40.04 |
+25:35:26.1 |
HIP 57265 |
14.79 |
| 2026-05-15 12:00 |
11:45:39.35 |
+25:35:23.2 |
HIP 57265 |
14.63 |
| 2026-05-16 00:00 |
11:45:38.68 |
+25:35:20.2 |
HIP 57265 |
14.47 |
| 2026-05-16 12:00 |
11:45:38.01 |
+25:35:17.1 |
HIP 57265 |
14.31 |
| 2026-05-17 00:00 |
11:45:37.35 |
+25:35:14.0 |
HIP 57265 |
14.16 |
| 2026-05-17 12:00 |
11:45:36.70 |
+25:35:10.8 |
HIP 57265 |
14.00 |
| 2026-05-18 00:00 |
11:45:36.06 |
+25:35:07.5 |
HIP 57265 |
13.85 |
| 2026-05-18 12:00 |
11:45:35.43 |
+25:35:04.1 |
HIP 57265 |
13.70 |
| 2026-05-19 00:00 |
11:45:34.81 |
+25:35:00.6 |
HIP 57265 |
13.55 |
| 2026-05-19 12:00 |
11:45:34.20 |
+25:34:57.1 |
HIP 57265 |
13.40 |
| 2026-05-20 00:00 |
11:45:33.60 |
+25:34:53.5 |
HIP 57265 |
13.26 |
| 2026-05-20 12:00 |
11:45:33.01 |
+25:34:49.8 |
HIP 57265 |
13.11 |
| 2026-05-21 00:00 |
11:45:32.43 |
+25:34:46.0 |
HIP 57265 |
12.97 |
| 2026-05-21 12:00 |
11:45:31.85 |
+25:34:42.1 |
HIP 57265 |
12.83 |
| 2026-05-22 00:00 |
11:45:31.29 |
+25:34:38.2 |
HIP 57265 |
12.70 |
| 2026-05-22 12:00 |
11:45:30.74 |
+25:34:34.2 |
HIP 57265 |
12.56 |
| 2026-05-23 00:00 |
11:45:30.19 |
+25:34:30.1 |
HIP 57265 |
12.43 |
| 2026-05-23 12:00 |
11:45:29.66 |
+25:34:25.9 |
HIP 57265 |
12.30 |
| 2026-05-24 00:00 |
11:45:29.13 |
+25:34:21.7 |
HIP 57265 |
12.17 |
| 2026-05-24 12:00 |
11:45:28.62 |
+25:34:17.4 |
HIP 57265 |
12.04 |
| 2026-05-25 00:00 |
11:45:28.12 |
+25:34:13.0 |
HIP 57265 |
11.92 |
| 2026-05-25 12:00 |
11:45:27.62 |
+25:34:08.5 |
HIP 57265 |
11.79 |
| 2026-05-26 00:00 |
11:45:27.14 |
+25:34:04.0 |
HIP 57265 |
11.67 |
| 2026-05-26 12:00 |
11:45:26.66 |
+25:33:59.3 |
HIP 57265 |
11.56 |
| 2026-05-27 00:00 |
11:45:26.20 |
+25:33:54.7 |
HIP 57265 |
11.44 |
| 2026-05-27 12:00 |
11:45:25.74 |
+25:33:49.9 |
HIP 57265 |
11.33 |
| 2026-05-28 00:00 |
11:45:25.30 |
+25:33:45.1 |
HIP 57265 |
11.22 |
| 2026-05-28 12:00 |
11:45:24.86 |
+25:33:40.1 |
HIP 57265 |
11.11 |
| 2026-05-29 00:00 |
11:45:24.43 |
+25:33:35.2 |
HIP 57265 |
11.00 |
| 2026-05-29 12:00 |
11:45:24.02 |
+25:33:30.1 |
HIP 57265 |
10.90 |
| 2026-05-30 00:00 |
11:45:23.61 |
+25:33:25.0 |
HIP 57265 |
10.80 |
| 2026-05-30 12:00 |
11:45:23.22 |
+25:33:19.8 |
HIP 57265 |
10.70 |
| 2026-05-31 00:00 |
11:45:22.83 |
+25:33:14.5 |
HIP 57265 |
10.61 |
| 2026-05-31 12:00 |
11:45:22.46 |
+25:33:09.2 |
HIP 57265 |
10.51 |
| 2026-06-01 00:00 |
11:45:22.09 |
+25:33:03.7 |
HIP 57265 |
10.42 |
| 2026-06-01 12:00 |
11:45:21.74 |
+25:32:58.3 |
HIP 57265 |
10.34 |
| 2026-06-02 00:00 |
11:45:21.39 |
+25:32:52.7 |
HIP 57265 |
10.25 |