メタデータ
| 項目 |
値 |
| Designation |
C/1941 K1 (van Gent) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-09-03T04:25:14.880000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
318 |
| 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) |
1941-09-03.0000000 |
| e |
1.00024300 |
| q (au) |
0.874789 |
| a (au) |
-3599.954732 |
| i (deg) |
94.516500 |
| Ω (om, deg) |
257.559800 |
| ω (w, deg) |
85.321900 |
| M (ma, deg) |
-0.000001 |
等級
散乱 + 全体線形
$$
M_a = (6.150 + 3.887\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.150 |
| n |
3.887 |
| gf |
1.000 |
| gb |
-0.946 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
05:09:12.07 |
-51:31:51.9 |
HIP 24098 |
18.78 |
| 2026-05-12 12:00 |
05:09:13.61 |
-51:31:44.4 |
HIP 24098 |
18.53 |
| 2026-05-13 00:00 |
05:09:15.16 |
-51:31:37.1 |
HIP 24098 |
18.27 |
| 2026-05-13 12:00 |
05:09:16.71 |
-51:31:29.8 |
HIP 24098 |
18.02 |
| 2026-05-14 00:00 |
05:09:18.27 |
-51:31:22.7 |
HIP 24098 |
17.77 |
| 2026-05-14 12:00 |
05:09:19.84 |
-51:31:15.7 |
HIP 24098 |
17.52 |
| 2026-05-15 00:00 |
05:09:21.41 |
-51:31:08.8 |
HIP 24098 |
17.28 |
| 2026-05-15 12:00 |
05:09:22.99 |
-51:31:02.0 |
HIP 24098 |
17.03 |
| 2026-05-16 00:00 |
05:09:24.57 |
-51:30:55.4 |
HIP 24098 |
16.78 |
| 2026-05-16 12:00 |
05:09:26.17 |
-51:30:48.9 |
HIP 24098 |
16.54 |
| 2026-05-17 00:00 |
05:09:27.76 |
-51:30:42.5 |
HIP 24098 |
16.30 |
| 2026-05-17 12:00 |
05:09:29.36 |
-51:30:36.2 |
HIP 24098 |
16.06 |
| 2026-05-18 00:00 |
05:09:30.97 |
-51:30:30.0 |
HIP 24098 |
15.83 |
| 2026-05-18 12:00 |
05:09:32.59 |
-51:30:24.0 |
HIP 24098 |
15.59 |
| 2026-05-19 00:00 |
05:09:34.20 |
-51:30:18.1 |
HIP 24098 |
15.36 |
| 2026-05-19 12:00 |
05:09:35.83 |
-51:30:12.3 |
HIP 24098 |
15.13 |
| 2026-05-20 00:00 |
05:09:37.45 |
-51:30:06.6 |
HIP 24098 |
14.90 |
| 2026-05-20 12:00 |
05:09:39.09 |
-51:30:01.0 |
HIP 24098 |
14.68 |
| 2026-05-21 00:00 |
05:09:40.72 |
-51:29:55.6 |
HIP 24098 |
14.46 |
| 2026-05-21 12:00 |
05:09:42.37 |
-51:29:50.3 |
HIP 24098 |
14.24 |
| 2026-05-22 00:00 |
05:09:44.01 |
-51:29:45.2 |
HIP 24098 |
14.02 |
| 2026-05-22 12:00 |
05:09:45.66 |
-51:29:40.1 |
HIP 24098 |
13.81 |
| 2026-05-23 00:00 |
05:09:47.32 |
-51:29:35.2 |
HIP 24098 |
13.60 |
| 2026-05-23 12:00 |
05:09:48.98 |
-51:29:30.4 |
HIP 24098 |
13.40 |
| 2026-05-24 00:00 |
05:09:50.64 |
-51:29:25.7 |
HIP 24098 |
13.20 |
| 2026-05-24 12:00 |
05:09:52.31 |
-51:29:21.2 |
HIP 24098 |
13.00 |
| 2026-05-25 00:00 |
05:09:53.98 |
-51:29:16.7 |
HIP 24098 |
12.81 |
| 2026-05-25 12:00 |
05:09:55.65 |
-51:29:12.5 |
HIP 24098 |
12.62 |
| 2026-05-26 00:00 |
05:09:57.33 |
-51:29:08.3 |
HIP 24098 |
12.43 |
| 2026-05-26 12:00 |
05:09:59.01 |
-51:29:04.2 |
HIP 24098 |
12.25 |
| 2026-05-27 00:00 |
05:10:00.70 |
-51:29:00.3 |
HIP 24098 |
12.08 |
| 2026-05-27 12:00 |
05:10:02.38 |
-51:28:56.5 |
HIP 24098 |
11.91 |
| 2026-05-28 00:00 |
05:10:04.07 |
-51:28:52.9 |
HIP 24098 |
11.75 |
| 2026-05-28 12:00 |
05:10:05.77 |
-51:28:49.4 |
HIP 24098 |
11.59 |
| 2026-05-29 00:00 |
05:10:07.46 |
-51:28:46.0 |
HIP 24098 |
11.44 |
| 2026-05-29 12:00 |
05:10:09.16 |
-51:28:42.7 |
HIP 24098 |
11.30 |
| 2026-05-30 00:00 |
05:10:10.87 |
-51:28:39.5 |
HIP 24098 |
11.16 |
| 2026-05-30 12:00 |
05:10:12.57 |
-51:28:36.5 |
HIP 24098 |
11.03 |
| 2026-05-31 00:00 |
05:10:14.28 |
-51:28:33.6 |
HIP 24098 |
10.90 |
| 2026-05-31 12:00 |
05:10:15.99 |
-51:28:30.9 |
HIP 24098 |
10.79 |
| 2026-06-01 00:00 |
05:10:17.70 |
-51:28:28.2 |
HIP 24098 |
10.68 |
| 2026-06-01 12:00 |
05:10:19.41 |
-51:28:25.7 |
HIP 24098 |
10.58 |
| 2026-06-02 00:00 |
05:10:21.13 |
-51:28:23.3 |
HIP 24098 |
10.48 |