メタデータ
| 項目 |
値 |
| Designation |
C/1959 Y1 (Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1960-03-20T23:55:16.296960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1960-04-04.0000000 |
| e |
1.00029776 |
| q (au) |
0.504411 |
| a (au) |
-1694.000993 |
| i (deg) |
159.600859 |
| Ω (om, deg) |
252.642575 |
| ω (w, deg) |
306.631855 |
| M (ma, deg) |
0.000198 |
等級
散乱 + 全体線形
$$
M_a = (7.979 + 3.474\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.979 |
| n |
3.474 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
| 1960-01-04 |
1960-02-17 |
-2.6200 |
+2.620 |
| 1960-03-21 |
1960-05-02 |
+1.1323 |
-0.041 |
| 1960-05-02 |
1960-06-17 |
+22.1412 |
-1.633 |
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 |
09:25:50.54 |
+33:47:34.4 |
HIP 46289 |
9.24 |
| 2026-07-29 12:00 |
09:25:51.92 |
+33:47:27.7 |
HIP 46289 |
9.10 |
| 2026-07-30 00:00 |
09:25:53.30 |
+33:47:21.1 |
HIP 46289 |
8.97 |
| 2026-07-30 12:00 |
09:25:54.68 |
+33:47:14.5 |
HIP 46289 |
8.85 |
| 2026-07-31 00:00 |
09:25:56.07 |
+33:47:07.9 |
HIP 46289 |
8.74 |
| 2026-07-31 12:00 |
09:25:57.45 |
+33:47:01.4 |
HIP 46289 |
8.63 |
| 2026-08-01 00:00 |
09:25:58.85 |
+33:46:54.9 |
HIP 46289 |
8.54 |
| 2026-08-01 12:00 |
09:26:00.24 |
+33:46:48.4 |
HIP 46289 |
8.45 |
| 2026-08-02 00:00 |
09:26:01.63 |
+33:46:42.0 |
HIP 46289 |
8.37 |
| 2026-08-02 12:00 |
09:26:03.03 |
+33:46:35.7 |
HIP 46289 |
8.31 |
| 2026-08-03 00:00 |
09:26:04.43 |
+33:46:29.3 |
HIP 46289 |
8.25 |
| 2026-08-03 12:00 |
09:26:05.83 |
+33:46:23.0 |
HIP 46289 |
8.21 |
| 2026-08-04 00:00 |
09:26:07.23 |
+33:46:16.8 |
HIP 46289 |
8.17 |
| 2026-08-04 12:00 |
09:26:08.63 |
+33:46:10.6 |
HIP 46289 |
8.15 |
| 2026-08-05 00:00 |
09:26:10.04 |
+33:46:04.4 |
HIP 46289 |
8.14 |
| 2026-08-05 12:00 |
09:26:11.44 |
+33:45:58.3 |
HIP 46289 |
8.13 |
| 2026-08-06 00:00 |
09:26:12.85 |
+33:45:52.3 |
HIP 46289 |
8.14 |
| 2026-08-06 12:00 |
09:26:14.26 |
+33:45:46.2 |
HIP 46289 |
8.16 |
| 2026-08-07 00:00 |
09:26:15.67 |
+33:45:40.2 |
HIP 46289 |
8.19 |
| 2026-08-07 12:00 |
09:26:17.08 |
+33:45:34.3 |
HIP 46289 |
8.23 |
| 2026-08-08 00:00 |
09:26:18.50 |
+33:45:28.4 |
HIP 46289 |
8.29 |
| 2026-08-08 12:00 |
09:26:19.91 |
+33:45:22.6 |
HIP 46289 |
8.35 |
| 2026-08-09 00:00 |
09:26:21.32 |
+33:45:16.8 |
HIP 46289 |
8.42 |
| 2026-08-09 12:00 |
09:26:22.74 |
+33:45:11.0 |
HIP 46289 |
8.50 |
| 2026-08-10 00:00 |
09:26:24.15 |
+33:45:05.3 |
HIP 46289 |
8.60 |
| 2026-08-10 12:00 |
09:26:25.57 |
+33:44:59.7 |
HIP 46289 |
8.70 |
| 2026-08-11 00:00 |
09:26:26.98 |
+33:44:54.1 |
HIP 46289 |
8.81 |
| 2026-08-11 12:00 |
09:26:28.40 |
+33:44:48.5 |
HIP 46289 |
8.92 |
| 2026-08-12 00:00 |
09:26:29.81 |
+33:44:43.0 |
HIP 46289 |
9.05 |
| 2026-08-12 12:00 |
09:26:31.23 |
+33:44:37.6 |
HIP 46289 |
9.19 |
| 2026-08-13 00:00 |
09:26:32.65 |
+33:44:32.2 |
HIP 46289 |
9.33 |
| 2026-08-13 12:00 |
09:26:34.06 |
+33:44:26.8 |
HIP 46289 |
9.48 |
| 2026-08-14 00:00 |
09:26:35.48 |
+33:44:21.5 |
HIP 46289 |
9.63 |
| 2026-08-14 12:00 |
09:26:36.89 |
+33:44:16.3 |
HIP 46289 |
9.79 |
| 2026-08-15 00:00 |
09:26:38.31 |
+33:44:11.1 |
HIP 46289 |
9.96 |
| 2026-08-15 12:00 |
09:26:39.72 |
+33:44:05.9 |
HIP 46289 |
10.13 |
| 2026-08-16 00:00 |
09:26:41.13 |
+33:44:00.8 |
HIP 46289 |
10.31 |
| 2026-08-16 12:00 |
09:26:42.55 |
+33:43:55.8 |
HIP 46289 |
10.50 |
| 2026-08-17 00:00 |
09:26:43.96 |
+33:43:50.8 |
HIP 46289 |
10.68 |
| 2026-08-17 12:00 |
09:26:45.37 |
+33:43:45.9 |
HIP 46289 |
10.88 |
| 2026-08-18 00:00 |
09:26:46.78 |
+33:43:41.0 |
HIP 46289 |
11.07 |
| 2026-08-18 12:00 |
09:26:48.18 |
+33:43:36.2 |
HIP 46289 |
11.27 |
| 2026-08-19 00:00 |
09:26:49.59 |
+33:43:31.4 |
HIP 46289 |
11.48 |