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) |
| 2026-05-12 00:00 |
09:23:40.52 |
+34:07:18.4 |
HIP 46022 |
14.45 |
| 2026-05-12 12:00 |
09:23:40.55 |
+34:07:12.1 |
HIP 46022 |
14.36 |
| 2026-05-13 00:00 |
09:23:40.60 |
+34:07:05.7 |
HIP 46022 |
14.27 |
| 2026-05-13 12:00 |
09:23:40.66 |
+34:06:59.3 |
HIP 46022 |
14.18 |
| 2026-05-14 00:00 |
09:23:40.73 |
+34:06:52.9 |
HIP 46022 |
14.09 |
| 2026-05-14 12:00 |
09:23:40.82 |
+34:06:46.4 |
HIP 46022 |
14.00 |
| 2026-05-15 00:00 |
09:23:40.91 |
+34:06:39.9 |
HIP 46022 |
13.91 |
| 2026-05-15 12:00 |
09:23:41.02 |
+34:06:33.3 |
HIP 46022 |
13.83 |
| 2026-05-16 00:00 |
09:23:41.14 |
+34:06:26.7 |
HIP 46022 |
13.74 |
| 2026-05-16 12:00 |
09:23:41.28 |
+34:06:20.0 |
HIP 46022 |
13.66 |
| 2026-05-17 00:00 |
09:23:41.43 |
+34:06:13.3 |
HIP 46022 |
13.58 |
| 2026-05-17 12:00 |
09:23:41.58 |
+34:06:06.6 |
HIP 46022 |
13.49 |
| 2026-05-18 00:00 |
09:23:41.76 |
+34:05:59.8 |
HIP 46022 |
13.41 |
| 2026-05-18 12:00 |
09:23:41.94 |
+34:05:53.0 |
HIP 46022 |
13.33 |
| 2026-05-19 00:00 |
09:23:42.13 |
+34:05:46.2 |
HIP 46022 |
13.25 |
| 2026-05-19 12:00 |
09:23:42.34 |
+34:05:39.3 |
HIP 46022 |
13.18 |
| 2026-05-20 00:00 |
09:23:42.56 |
+34:05:32.3 |
HIP 46022 |
13.10 |
| 2026-05-20 12:00 |
09:23:42.80 |
+34:05:25.4 |
HIP 46022 |
13.03 |
| 2026-05-21 00:00 |
09:23:43.04 |
+34:05:18.4 |
HIP 46022 |
12.96 |
| 2026-05-21 12:00 |
09:23:43.30 |
+34:05:11.4 |
HIP 46022 |
12.89 |
| 2026-05-22 00:00 |
09:23:43.57 |
+34:05:04.3 |
HIP 46022 |
12.82 |
| 2026-05-22 12:00 |
09:23:43.85 |
+34:04:57.2 |
HIP 46022 |
12.75 |
| 2026-05-23 00:00 |
09:23:44.14 |
+34:04:50.1 |
HIP 46022 |
12.69 |
| 2026-05-23 12:00 |
09:23:44.44 |
+34:04:42.9 |
HIP 46022 |
12.62 |
| 2026-05-24 00:00 |
09:23:44.76 |
+34:04:35.7 |
HIP 46022 |
12.56 |
| 2026-05-24 12:00 |
09:23:45.09 |
+34:04:28.5 |
HIP 46022 |
12.50 |
| 2026-05-25 00:00 |
09:23:45.43 |
+34:04:21.2 |
HIP 46022 |
12.45 |
| 2026-05-25 12:00 |
09:23:45.78 |
+34:04:13.9 |
HIP 46022 |
12.40 |
| 2026-05-26 00:00 |
09:23:46.14 |
+34:04:06.6 |
HIP 46022 |
12.34 |
| 2026-05-26 12:00 |
09:23:46.52 |
+34:03:59.3 |
HIP 46022 |
12.30 |
| 2026-05-27 00:00 |
09:23:46.91 |
+34:03:51.9 |
HIP 46022 |
12.25 |
| 2026-05-27 12:00 |
09:23:47.31 |
+34:03:44.5 |
HIP 46022 |
12.21 |
| 2026-05-28 00:00 |
09:23:47.72 |
+34:03:37.1 |
HIP 46022 |
12.17 |
| 2026-05-28 12:00 |
09:23:48.14 |
+34:03:29.6 |
HIP 46022 |
12.13 |
| 2026-05-29 00:00 |
09:23:48.57 |
+34:03:22.1 |
HIP 46022 |
12.09 |
| 2026-05-29 12:00 |
09:23:49.02 |
+34:03:14.6 |
HIP 46022 |
12.06 |
| 2026-05-30 00:00 |
09:23:49.47 |
+34:03:07.1 |
HIP 46022 |
12.04 |
| 2026-05-30 12:00 |
09:23:49.94 |
+34:02:59.5 |
HIP 46022 |
12.01 |
| 2026-05-31 00:00 |
09:23:50.42 |
+34:02:51.9 |
HIP 46022 |
11.99 |
| 2026-05-31 12:00 |
09:23:50.91 |
+34:02:44.3 |
HIP 46022 |
11.97 |
| 2026-06-01 00:00 |
09:23:51.41 |
+34:02:36.7 |
HIP 46022 |
11.96 |
| 2026-06-01 12:00 |
09:23:51.93 |
+34:02:29.0 |
HIP 46022 |
11.95 |
| 2026-06-02 00:00 |
09:23:52.45 |
+34:02:21.3 |
HIP 46022 |
11.94 |