メタデータ
| 項目 |
値 |
| Designation |
C/1984 K1 (Shoemaker) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1985-09-04T14:13:51.985920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
176 |
| NEO |
- |
| M1 |
5.600 |
| K1 |
8.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1986-02-09.0000000 |
| e |
1.00072275 |
| q (au) |
2.696507 |
| a (au) |
-3730.894921 |
| i (deg) |
116.665429 |
| Ω (om, deg) |
49.690085 |
| ω (w, deg) |
235.469697 |
| M (ma, deg) |
0.000681 |
等級
散乱 + 全体線形
$$
M_a = (7.496 + 3.683\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.496 |
| n |
3.683 |
| gf |
1.000 |
| gb |
-0.707 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
| 1984-05-27 |
1985-06-23 |
+0.0410 |
-0.115 |
| 1985-10-13 |
1992-01-04 |
-0.7996 |
+1.135 |
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 |
01:21:55.58 |
+38:44:47.2 |
HIP 6239 |
26.29 |
| 2026-05-12 12:00 |
01:21:57.41 |
+38:45:02.0 |
HIP 6239 |
26.45 |
| 2026-05-13 00:00 |
01:21:59.24 |
+38:45:16.8 |
HIP 6239 |
26.62 |
| 2026-05-13 12:00 |
01:22:01.05 |
+38:45:31.8 |
HIP 6239 |
26.79 |
| 2026-05-14 00:00 |
01:22:02.85 |
+38:45:46.8 |
HIP 6239 |
26.96 |
| 2026-05-14 12:00 |
01:22:04.65 |
+38:46:01.8 |
HIP 6239 |
27.14 |
| 2026-05-15 00:00 |
01:22:06.43 |
+38:46:16.9 |
HIP 6239 |
27.32 |
| 2026-05-15 12:00 |
01:22:08.21 |
+38:46:32.1 |
HIP 6239 |
27.50 |
| 2026-05-16 00:00 |
01:22:09.98 |
+38:46:47.3 |
HIP 6239 |
27.69 |
| 2026-05-16 12:00 |
01:22:11.73 |
+38:47:02.6 |
HIP 6239 |
27.88 |
| 2026-05-17 00:00 |
01:22:13.48 |
+38:47:18.0 |
HIP 6239 |
28.07 |
| 2026-05-17 12:00 |
01:22:15.22 |
+38:47:33.4 |
HIP 6239 |
28.27 |
| 2026-05-18 00:00 |
01:22:16.95 |
+38:47:48.8 |
HIP 6239 |
28.47 |
| 2026-05-18 12:00 |
01:22:18.66 |
+38:48:04.3 |
HIP 6239 |
28.67 |
| 2026-05-19 00:00 |
01:22:20.37 |
+38:48:19.9 |
HIP 6578 |
28.60 |
| 2026-05-19 12:00 |
01:22:22.07 |
+38:48:35.5 |
HIP 6578 |
28.18 |
| 2026-05-20 00:00 |
01:22:23.75 |
+38:48:51.2 |
HIP 6578 |
27.77 |
| 2026-05-20 12:00 |
01:22:25.43 |
+38:49:06.9 |
HIP 6578 |
27.36 |
| 2026-05-21 00:00 |
01:22:27.09 |
+38:49:22.6 |
HIP 6578 |
26.95 |
| 2026-05-21 12:00 |
01:22:28.75 |
+38:49:38.4 |
HIP 6578 |
26.55 |
| 2026-05-22 00:00 |
01:22:30.39 |
+38:49:54.3 |
HIP 6578 |
26.14 |
| 2026-05-22 12:00 |
01:22:32.02 |
+38:50:10.2 |
HIP 6578 |
25.74 |
| 2026-05-23 00:00 |
01:22:33.64 |
+38:50:26.1 |
HIP 6578 |
25.34 |
| 2026-05-23 12:00 |
01:22:35.25 |
+38:50:42.1 |
HIP 6578 |
24.94 |
| 2026-05-24 00:00 |
01:22:36.84 |
+38:50:58.1 |
HIP 6578 |
24.55 |
| 2026-05-24 12:00 |
01:22:38.43 |
+38:51:14.1 |
HIP 6578 |
24.15 |
| 2026-05-25 00:00 |
01:22:40.00 |
+38:51:30.2 |
HIP 6578 |
23.76 |
| 2026-05-25 12:00 |
01:22:41.56 |
+38:51:46.4 |
HIP 6578 |
23.37 |
| 2026-05-26 00:00 |
01:22:43.11 |
+38:52:02.5 |
HIP 6578 |
22.99 |
| 2026-05-26 12:00 |
01:22:44.65 |
+38:52:18.7 |
HIP 6578 |
22.60 |
| 2026-05-27 00:00 |
01:22:46.18 |
+38:52:35.0 |
HIP 6578 |
22.22 |
| 2026-05-27 12:00 |
01:22:47.69 |
+38:52:51.2 |
HIP 6578 |
21.84 |
| 2026-05-28 00:00 |
01:22:49.19 |
+38:53:07.5 |
HIP 6578 |
21.47 |
| 2026-05-28 12:00 |
01:22:50.68 |
+38:53:23.9 |
HIP 6578 |
21.09 |
| 2026-05-29 00:00 |
01:22:52.16 |
+38:53:40.2 |
HIP 6578 |
20.72 |
| 2026-05-29 12:00 |
01:22:53.62 |
+38:53:56.6 |
HIP 6578 |
20.36 |
| 2026-05-30 00:00 |
01:22:55.07 |
+38:54:13.1 |
HIP 6578 |
19.99 |
| 2026-05-30 12:00 |
01:22:56.51 |
+38:54:29.5 |
HIP 6578 |
19.63 |
| 2026-05-31 00:00 |
01:22:57.93 |
+38:54:46.0 |
HIP 6578 |
19.28 |
| 2026-05-31 12:00 |
01:22:59.34 |
+38:55:02.5 |
HIP 6578 |
18.92 |
| 2026-06-01 00:00 |
01:23:00.74 |
+38:55:19.0 |
HIP 6578 |
18.57 |
| 2026-06-01 12:00 |
01:23:02.13 |
+38:55:35.6 |
HIP 6578 |
18.23 |
| 2026-06-02 00:00 |
01:23:03.50 |
+38:55:52.1 |
HIP 6578 |
17.89 |