C/1947 S1 (Bester)
メタデータ
| 項目 |
値 |
| Designation |
C/1947 S1 (Bester) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-02-16T10:08:20.811840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
42 |
| 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) |
1948-01-07.0000000 |
| e |
1.00034321 |
| q (au) |
0.748130 |
| a (au) |
-2179.799629 |
| i (deg) |
140.568676 |
| Ω (om, deg) |
271.438753 |
| ω (w, deg) |
350.213543 |
| M (ma, deg) |
-0.000391 |
等級
散乱 + 全体線形
$$
M_a = (6.180 + 3.781\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.180 |
| n |
3.781 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| 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 |
| 1947-10-05 |
1948-01-12 |
+0.4348 |
-0.045 |
| 1948-02-28 |
1948-05-10 |
-2.3211 |
+0.190 |
| 1948-05-10 |
1949-02-06 |
+6.4739 |
-2.179 |
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 |
07:19:53.39 |
+34:44:32.6 |
HIP 35349 |
25.45 |
| 2026-02-03 12:00 |
07:19:52.08 |
+34:44:33.0 |
HIP 35349 |
25.22 |
| 2026-02-04 00:00 |
07:19:50.79 |
+34:44:33.3 |
HIP 35349 |
24.99 |
| 2026-02-04 12:00 |
07:19:49.49 |
+34:44:33.6 |
HIP 35349 |
24.75 |
| 2026-02-05 00:00 |
07:19:48.20 |
+34:44:33.9 |
HIP 35349 |
24.52 |
| 2026-02-05 12:00 |
07:19:46.92 |
+34:44:34.1 |
HIP 35349 |
24.30 |
| 2026-02-06 00:00 |
07:19:45.65 |
+34:44:34.3 |
HIP 35349 |
24.07 |
| 2026-02-06 12:00 |
07:19:44.38 |
+34:44:34.4 |
HIP 35349 |
23.85 |
| 2026-02-07 00:00 |
07:19:43.11 |
+34:44:34.5 |
HIP 35349 |
23.63 |
| 2026-02-07 12:00 |
07:19:41.86 |
+34:44:34.6 |
HIP 35349 |
23.41 |
| 2026-02-08 00:00 |
07:19:40.61 |
+34:44:34.6 |
HIP 35349 |
23.19 |
| 2026-02-08 12:00 |
07:19:39.36 |
+34:44:34.6 |
HIP 35349 |
22.98 |
| 2026-02-09 00:00 |
07:19:38.12 |
+34:44:34.5 |
HIP 35349 |
22.77 |
| 2026-02-09 12:00 |
07:19:36.89 |
+34:44:34.4 |
HIP 35349 |
22.56 |
| 2026-02-10 00:00 |
07:19:35.67 |
+34:44:34.3 |
HIP 35349 |
22.35 |
| 2026-02-10 12:00 |
07:19:34.45 |
+34:44:34.1 |
HIP 35349 |
22.14 |
| 2026-02-11 00:00 |
07:19:33.24 |
+34:44:33.8 |
HIP 35349 |
21.94 |
| 2026-02-11 12:00 |
07:19:32.03 |
+34:44:33.6 |
HIP 35349 |
21.74 |
| 2026-02-12 00:00 |
07:19:30.83 |
+34:44:33.3 |
HIP 35349 |
21.55 |
| 2026-02-12 12:00 |
07:19:29.64 |
+34:44:32.9 |
HIP 35349 |
21.35 |
| 2026-02-13 00:00 |
07:19:28.46 |
+34:44:32.6 |
HIP 35349 |
21.16 |
| 2026-02-13 12:00 |
07:19:27.29 |
+34:44:32.1 |
HIP 35349 |
20.97 |
| 2026-02-14 00:00 |
07:19:26.12 |
+34:44:31.7 |
HIP 35349 |
20.78 |
| 2026-02-14 12:00 |
07:19:24.96 |
+34:44:31.2 |
HIP 35349 |
20.60 |
| 2026-02-15 00:00 |
07:19:23.80 |
+34:44:30.6 |
HIP 35349 |
20.42 |
| 2026-02-15 12:00 |
07:19:22.66 |
+34:44:30.1 |
HIP 35349 |
20.24 |
| 2026-02-16 00:00 |
07:19:21.52 |
+34:44:29.4 |
HIP 35349 |
20.06 |
| 2026-02-16 12:00 |
07:19:20.39 |
+34:44:28.8 |
HIP 35349 |
19.89 |
| 2026-02-17 00:00 |
07:19:19.27 |
+34:44:28.1 |
HIP 35349 |
19.72 |
| 2026-02-17 12:00 |
07:19:18.16 |
+34:44:27.3 |
HIP 35349 |
19.55 |
| 2026-02-18 00:00 |
07:19:17.05 |
+34:44:26.6 |
HIP 35349 |
19.39 |
| 2026-02-18 12:00 |
07:19:15.95 |
+34:44:25.7 |
HIP 35349 |
19.23 |
| 2026-02-19 00:00 |
07:19:14.86 |
+34:44:24.9 |
HIP 35349 |
19.07 |
| 2026-02-19 12:00 |
07:19:13.78 |
+34:44:24.0 |
HIP 35349 |
18.92 |
| 2026-02-20 00:00 |
07:19:12.71 |
+34:44:23.1 |
HIP 35349 |
18.76 |
| 2026-02-20 12:00 |
07:19:11.65 |
+34:44:22.1 |
HIP 35349 |
18.62 |
| 2026-02-21 00:00 |
07:19:10.59 |
+34:44:21.1 |
HIP 35349 |
18.47 |
| 2026-02-21 12:00 |
07:19:09.55 |
+34:44:20.0 |
HIP 35349 |
18.33 |
| 2026-02-22 00:00 |
07:19:08.51 |
+34:44:18.9 |
HIP 35349 |
18.19 |
| 2026-02-22 12:00 |
07:19:07.48 |
+34:44:17.8 |
HIP 35349 |
18.05 |
| 2026-02-23 00:00 |
07:19:06.46 |
+34:44:16.6 |
HIP 35349 |
17.92 |
| 2026-02-23 12:00 |
07:19:05.45 |
+34:44:15.4 |
HIP 35349 |
17.79 |
| 2026-02-24 00:00 |
07:19:04.45 |
+34:44:14.2 |
HIP 35349 |
17.66 |