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) |
| 2026-03-26 00:00 |
05:07:30.55 |
-51:50:40.5 |
HIP 23973 |
16.15 |
| 2026-03-26 12:00 |
05:07:31.05 |
-51:50:25.2 |
HIP 23973 |
16.17 |
| 2026-03-27 00:00 |
05:07:31.57 |
-51:50:10.1 |
HIP 23973 |
16.18 |
| 2026-03-27 12:00 |
05:07:32.10 |
-51:49:54.9 |
HIP 23973 |
16.20 |
| 2026-03-28 00:00 |
05:07:32.65 |
-51:49:39.8 |
HIP 23973 |
16.23 |
| 2026-03-28 12:00 |
05:07:33.21 |
-51:49:24.8 |
HIP 23973 |
16.25 |
| 2026-03-29 00:00 |
05:07:33.79 |
-51:49:09.7 |
HIP 23973 |
16.28 |
| 2026-03-29 12:00 |
05:07:34.38 |
-51:48:54.8 |
HIP 23973 |
16.30 |
| 2026-03-30 00:00 |
05:07:34.99 |
-51:48:39.8 |
HIP 23973 |
16.33 |
| 2026-03-30 12:00 |
05:07:35.60 |
-51:48:25.0 |
HIP 23973 |
16.36 |
| 2026-03-31 00:00 |
05:07:36.24 |
-51:48:10.1 |
HIP 23973 |
16.40 |
| 2026-03-31 12:00 |
05:07:36.88 |
-51:47:55.4 |
HIP 23973 |
16.43 |
| 2026-04-01 00:00 |
05:07:37.54 |
-51:47:40.6 |
HIP 23973 |
16.47 |
| 2026-04-01 12:00 |
05:07:38.22 |
-51:47:25.9 |
HIP 23973 |
16.51 |
| 2026-04-02 00:00 |
05:07:38.91 |
-51:47:11.3 |
HIP 23973 |
16.55 |
| 2026-04-02 12:00 |
05:07:39.61 |
-51:46:56.7 |
HIP 23973 |
16.60 |
| 2026-04-03 00:00 |
05:07:40.32 |
-51:46:42.2 |
HIP 23973 |
16.64 |
| 2026-04-03 12:00 |
05:07:41.05 |
-51:46:27.8 |
HIP 23973 |
16.69 |
| 2026-04-04 00:00 |
05:07:41.80 |
-51:46:13.3 |
HIP 23973 |
16.74 |
| 2026-04-04 12:00 |
05:07:42.55 |
-51:45:59.0 |
HIP 23973 |
16.79 |
| 2026-04-05 00:00 |
05:07:43.32 |
-51:45:44.7 |
HIP 23973 |
16.84 |
| 2026-04-05 12:00 |
05:07:44.11 |
-51:45:30.5 |
HIP 23973 |
16.89 |
| 2026-04-06 00:00 |
05:07:44.90 |
-51:45:16.3 |
HIP 23973 |
16.95 |
| 2026-04-06 12:00 |
05:07:45.71 |
-51:45:02.2 |
HIP 23973 |
17.01 |
| 2026-04-07 00:00 |
05:07:46.53 |
-51:44:48.1 |
HIP 23973 |
17.07 |
| 2026-04-07 12:00 |
05:07:47.37 |
-51:44:34.1 |
HIP 23973 |
17.13 |
| 2026-04-08 00:00 |
05:07:48.22 |
-51:44:20.2 |
HIP 23973 |
17.19 |
| 2026-04-08 12:00 |
05:07:49.08 |
-51:44:06.3 |
HIP 23973 |
17.26 |
| 2026-04-09 00:00 |
05:07:49.96 |
-51:43:52.5 |
HIP 23973 |
17.32 |
| 2026-04-09 12:00 |
05:07:50.84 |
-51:43:38.8 |
HIP 23973 |
17.39 |
| 2026-04-10 00:00 |
05:07:51.74 |
-51:43:25.1 |
HIP 23973 |
17.46 |
| 2026-04-10 12:00 |
05:07:52.66 |
-51:43:11.5 |
HIP 23973 |
17.53 |
| 2026-04-11 00:00 |
05:07:53.58 |
-51:42:58.0 |
HIP 23973 |
17.60 |
| 2026-04-11 12:00 |
05:07:54.52 |
-51:42:44.5 |
HIP 23973 |
17.68 |
| 2026-04-12 00:00 |
05:07:55.47 |
-51:42:31.2 |
HIP 23973 |
17.75 |
| 2026-04-12 12:00 |
05:07:56.44 |
-51:42:17.8 |
HIP 23973 |
17.83 |
| 2026-04-13 00:00 |
05:07:57.41 |
-51:42:04.6 |
HIP 23973 |
17.91 |
| 2026-04-13 12:00 |
05:07:58.40 |
-51:41:51.4 |
HIP 23973 |
17.99 |
| 2026-04-14 00:00 |
05:07:59.40 |
-51:41:38.4 |
HIP 23973 |
18.07 |
| 2026-04-14 12:00 |
05:08:00.41 |
-51:41:25.3 |
HIP 23973 |
18.16 |
| 2026-04-15 00:00 |
05:08:01.44 |
-51:41:12.4 |
HIP 23973 |
18.24 |
| 2026-04-15 12:00 |
05:08:02.47 |
-51:40:59.6 |
HIP 23973 |
18.33 |
| 2026-04-16 00:00 |
05:08:03.52 |
-51:40:46.8 |
HIP 23973 |
18.41 |