メタデータ
| 項目 |
値 |
| Designation |
C/1941 B2 (de Kock-Paraskevopoulos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-01-27T15:47:05.280000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
130 |
| 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) |
1941-02-15.0000000 |
| e |
0.99910200 |
| q (au) |
0.790033 |
| a (au) |
879.769488 |
| i (deg) |
168.203900 |
| Ω (om, deg) |
43.106900 |
| ω (w, deg) |
268.699700 |
| M (ma, deg) |
0.000693 |
等級
散乱 + 全体線形
$$
M_a = (5.838 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.838 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.846 |
| k |
0.901 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
21:31:27.80 |
-02:21:05.5 |
HIP 106439 |
32.22 |
| 2026-07-29 12:00 |
21:31:26.78 |
-02:21:09.6 |
HIP 106439 |
32.44 |
| 2026-07-30 00:00 |
21:31:25.76 |
-02:21:13.8 |
HIP 106439 |
32.67 |
| 2026-07-30 12:00 |
21:31:24.73 |
-02:21:18.0 |
HIP 106439 |
32.90 |
| 2026-07-31 00:00 |
21:31:23.70 |
-02:21:22.3 |
HIP 106439 |
33.13 |
| 2026-07-31 12:00 |
21:31:22.67 |
-02:21:26.6 |
HIP 106439 |
33.35 |
| 2026-08-01 00:00 |
21:31:21.63 |
-02:21:30.9 |
HIP 106439 |
33.58 |
| 2026-08-01 12:00 |
21:31:20.60 |
-02:21:35.3 |
HIP 106439 |
33.81 |
| 2026-08-02 00:00 |
21:31:19.56 |
-02:21:39.7 |
HIP 106439 |
34.05 |
| 2026-08-02 12:00 |
21:31:18.52 |
-02:21:44.1 |
HIP 106439 |
34.28 |
| 2026-08-03 00:00 |
21:31:17.48 |
-02:21:48.6 |
HIP 106439 |
34.51 |
| 2026-08-03 12:00 |
21:31:16.44 |
-02:21:53.1 |
HIP 106439 |
34.75 |
| 2026-08-04 00:00 |
21:31:15.40 |
-02:21:57.7 |
HIP 106439 |
34.98 |
| 2026-08-04 12:00 |
21:31:14.35 |
-02:22:02.3 |
HIP 106439 |
35.21 |
| 2026-08-05 00:00 |
21:31:13.31 |
-02:22:06.9 |
HIP 106439 |
35.45 |
| 2026-08-05 12:00 |
21:31:12.26 |
-02:22:11.6 |
HIP 106439 |
35.69 |
| 2026-08-06 00:00 |
21:31:11.21 |
-02:22:16.3 |
HIP 106439 |
35.93 |
| 2026-08-06 12:00 |
21:31:10.16 |
-02:22:21.0 |
HIP 106439 |
36.16 |
| 2026-08-07 00:00 |
21:31:09.11 |
-02:22:25.8 |
HIP 106439 |
36.40 |
| 2026-08-07 12:00 |
21:31:08.06 |
-02:22:30.6 |
HIP 106439 |
36.64 |
| 2026-08-08 00:00 |
21:31:07.00 |
-02:22:35.4 |
HIP 106439 |
36.88 |
| 2026-08-08 12:00 |
21:31:05.95 |
-02:22:40.3 |
HIP 106439 |
37.12 |
| 2026-08-09 00:00 |
21:31:04.89 |
-02:22:45.2 |
HIP 106439 |
37.36 |
| 2026-08-09 12:00 |
21:31:03.84 |
-02:22:50.2 |
HIP 106439 |
37.60 |
| 2026-08-10 00:00 |
21:31:02.78 |
-02:22:55.1 |
HIP 106439 |
37.85 |
| 2026-08-10 12:00 |
21:31:01.73 |
-02:23:00.1 |
HIP 106439 |
38.09 |
| 2026-08-11 00:00 |
21:31:00.67 |
-02:23:05.2 |
HIP 106439 |
38.33 |
| 2026-08-11 12:00 |
21:30:59.61 |
-02:23:10.3 |
HIP 106439 |
38.58 |
| 2026-08-12 00:00 |
21:30:58.55 |
-02:23:15.4 |
HIP 106439 |
38.82 |
| 2026-08-12 12:00 |
21:30:57.50 |
-02:23:20.5 |
HIP 106439 |
39.06 |
| 2026-08-13 00:00 |
21:30:56.44 |
-02:23:25.7 |
HIP 106439 |
39.31 |
| 2026-08-13 12:00 |
21:30:55.38 |
-02:23:30.9 |
HIP 106439 |
39.55 |
| 2026-08-14 00:00 |
21:30:54.32 |
-02:23:36.1 |
HIP 106236 |
39.75 |
| 2026-08-14 12:00 |
21:30:53.26 |
-02:23:41.3 |
HIP 106236 |
39.85 |
| 2026-08-15 00:00 |
21:30:52.21 |
-02:23:46.6 |
HIP 106236 |
39.96 |
| 2026-08-15 12:00 |
21:30:51.15 |
-02:23:51.9 |
HIP 106236 |
40.07 |
| 2026-08-16 00:00 |
21:30:50.09 |
-02:23:57.3 |
HIP 106011 |
39.88 |
| 2026-08-16 12:00 |
21:30:49.03 |
-02:24:02.6 |
HIP 106011 |
39.60 |
| 2026-08-17 00:00 |
21:30:47.98 |
-02:24:08.0 |
HIP 106011 |
39.32 |
| 2026-08-17 12:00 |
21:30:46.92 |
-02:24:13.4 |
HIP 106011 |
39.04 |
| 2026-08-18 00:00 |
21:30:45.87 |
-02:24:18.9 |
HIP 106011 |
38.76 |
| 2026-08-18 12:00 |
21:30:44.81 |
-02:24:24.4 |
HIP 106011 |
38.48 |
| 2026-08-19 00:00 |
21:30:43.76 |
-02:24:29.9 |
HIP 106011 |
38.21 |