メタデータ
| 項目 |
値 |
| Designation |
C/1950 K1 (Minkowski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1951-01-15T01:00:02.396160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
32 |
| 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) |
1951-02-12.0000000 |
| e |
1.00121746 |
| q (au) |
2.572332 |
| a (au) |
-2112.865342 |
| i (deg) |
144.155299 |
| Ω (om, deg) |
38.890420 |
| ω (w, deg) |
192.467845 |
| M (ma, deg) |
0.000284 |
等級
散乱 + 全体線形
$$
M_a = (5.948 + 2.647\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.948 |
| n |
2.647 |
| gf |
0.952 |
| gb |
-0.765 |
| k |
0.984 |
| 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 |
| 1950-06-06 |
1951-01-14 |
+2.1156 |
-1.155 |
| 1951-01-19 |
1951-06-30 |
+15.8103 |
-6.727 |
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) |
| 2026-03-26 00:00 |
02:48:41.13 |
+12:28:50.5 |
HIP 13201 |
20.54 |
| 2026-03-26 12:00 |
02:48:42.00 |
+12:28:55.4 |
HIP 13201 |
20.31 |
| 2026-03-27 00:00 |
02:48:42.89 |
+12:29:00.4 |
HIP 13201 |
20.09 |
| 2026-03-27 12:00 |
02:48:43.77 |
+12:29:05.4 |
HIP 13201 |
19.86 |
| 2026-03-28 00:00 |
02:48:44.67 |
+12:29:10.4 |
HIP 13201 |
19.63 |
| 2026-03-28 12:00 |
02:48:45.57 |
+12:29:15.5 |
HIP 13201 |
19.40 |
| 2026-03-29 00:00 |
02:48:46.47 |
+12:29:20.5 |
HIP 13201 |
19.16 |
| 2026-03-29 12:00 |
02:48:47.38 |
+12:29:25.6 |
HIP 13201 |
18.93 |
| 2026-03-30 00:00 |
02:48:48.30 |
+12:29:30.7 |
HIP 13201 |
18.69 |
| 2026-03-30 12:00 |
02:48:49.22 |
+12:29:35.8 |
HIP 13201 |
18.46 |
| 2026-03-31 00:00 |
02:48:50.15 |
+12:29:41.0 |
HIP 13201 |
18.22 |
| 2026-03-31 12:00 |
02:48:51.09 |
+12:29:46.1 |
HIP 13201 |
17.98 |
| 2026-04-01 00:00 |
02:48:52.03 |
+12:29:51.3 |
HIP 13201 |
17.74 |
| 2026-04-01 12:00 |
02:48:52.97 |
+12:29:56.5 |
HIP 13201 |
17.50 |
| 2026-04-02 00:00 |
02:48:53.92 |
+12:30:01.7 |
HIP 13201 |
17.26 |
| 2026-04-02 12:00 |
02:48:54.88 |
+12:30:06.9 |
HIP 13201 |
17.01 |
| 2026-04-03 00:00 |
02:48:55.84 |
+12:30:12.1 |
HIP 13201 |
16.77 |
| 2026-04-03 12:00 |
02:48:56.81 |
+12:30:17.3 |
HIP 13201 |
16.52 |
| 2026-04-04 00:00 |
02:48:57.78 |
+12:30:22.6 |
HIP 13201 |
16.28 |
| 2026-04-04 12:00 |
02:48:58.76 |
+12:30:27.9 |
HIP 13201 |
16.03 |
| 2026-04-05 00:00 |
02:48:59.74 |
+12:30:33.1 |
HIP 13201 |
15.78 |
| 2026-04-05 12:00 |
02:49:00.73 |
+12:30:38.4 |
HIP 13201 |
15.53 |
| 2026-04-06 00:00 |
02:49:01.72 |
+12:30:43.7 |
HIP 13201 |
15.28 |
| 2026-04-06 12:00 |
02:49:02.72 |
+12:30:49.1 |
HIP 13201 |
15.03 |
| 2026-04-07 00:00 |
02:49:03.72 |
+12:30:54.4 |
HIP 13201 |
14.78 |
| 2026-04-07 12:00 |
02:49:04.73 |
+12:30:59.7 |
HIP 13201 |
14.53 |
| 2026-04-08 00:00 |
02:49:05.74 |
+12:31:05.1 |
HIP 13201 |
14.28 |
| 2026-04-08 12:00 |
02:49:06.75 |
+12:31:10.5 |
HIP 13201 |
14.02 |
| 2026-04-09 00:00 |
02:49:07.77 |
+12:31:15.9 |
HIP 13201 |
13.77 |
| 2026-04-09 12:00 |
02:49:08.80 |
+12:31:21.2 |
HIP 13201 |
13.51 |
| 2026-04-10 00:00 |
02:49:09.82 |
+12:31:26.6 |
HIP 13201 |
13.26 |
| 2026-04-10 12:00 |
02:49:10.86 |
+12:31:32.0 |
HIP 13201 |
13.00 |
| 2026-04-11 00:00 |
02:49:11.89 |
+12:31:37.5 |
HIP 13201 |
12.75 |
| 2026-04-11 12:00 |
02:49:12.93 |
+12:31:42.9 |
HIP 13201 |
12.49 |
| 2026-04-12 00:00 |
02:49:13.98 |
+12:31:48.3 |
HIP 13201 |
12.23 |
| 2026-04-12 12:00 |
02:49:15.03 |
+12:31:53.8 |
HIP 13201 |
11.97 |
| 2026-04-13 00:00 |
02:49:16.08 |
+12:31:59.2 |
HIP 13201 |
11.72 |
| 2026-04-13 12:00 |
02:49:17.14 |
+12:32:04.7 |
HIP 13201 |
11.46 |
| 2026-04-14 00:00 |
02:49:18.20 |
+12:32:10.1 |
HIP 13201 |
11.20 |
| 2026-04-14 12:00 |
02:49:19.26 |
+12:32:15.6 |
HIP 13201 |
10.95 |
| 2026-04-15 00:00 |
02:49:20.33 |
+12:32:21.1 |
HIP 13201 |
10.69 |
| 2026-04-15 12:00 |
02:49:21.40 |
+12:32:26.6 |
HIP 13201 |
10.43 |
| 2026-04-16 00:00 |
02:49:22.47 |
+12:32:32.1 |
HIP 13201 |
10.17 |