メタデータ
| 項目 |
値 |
| Designation |
C/1943 W1 (van Gent-Peltier-Daimaca) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1944-01-12T06:19:17.172480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
12 |
| 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) |
1943-12-03.0000000 |
| e |
0.99951300 |
| q (au) |
0.874252 |
| a (au) |
1795.167782 |
| i (deg) |
136.183297 |
| Ω (om, deg) |
58.630122 |
| ω (w, deg) |
33.091602 |
| M (ma, deg) |
359.999478 |
等級
散乱 + 全体線形
$$
M_a = (9.549 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.549 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
14:14:05.42 |
-30:12:52.9 |
HIP 69560 |
3.47 |
| 2026-05-12 12:00 |
14:14:04.20 |
-30:12:46.5 |
HIP 69560 |
3.67 |
| 2026-05-13 00:00 |
14:14:02.99 |
-30:12:40.1 |
HIP 69560 |
3.88 |
| 2026-05-13 12:00 |
14:14:01.77 |
-30:12:33.6 |
HIP 69560 |
4.10 |
| 2026-05-14 00:00 |
14:14:00.56 |
-30:12:27.1 |
HIP 69560 |
4.33 |
| 2026-05-14 12:00 |
14:13:59.36 |
-30:12:20.6 |
HIP 69560 |
4.56 |
| 2026-05-15 00:00 |
14:13:58.15 |
-30:12:14.0 |
HIP 69560 |
4.80 |
| 2026-05-15 12:00 |
14:13:56.95 |
-30:12:07.4 |
HIP 69560 |
5.04 |
| 2026-05-16 00:00 |
14:13:55.75 |
-30:12:00.8 |
HIP 69560 |
5.29 |
| 2026-05-16 12:00 |
14:13:54.56 |
-30:11:54.2 |
HIP 69560 |
5.54 |
| 2026-05-17 00:00 |
14:13:53.37 |
-30:11:47.5 |
HIP 69560 |
5.78 |
| 2026-05-17 12:00 |
14:13:52.19 |
-30:11:40.9 |
HIP 69560 |
6.04 |
| 2026-05-18 00:00 |
14:13:51.00 |
-30:11:34.1 |
HIP 69560 |
6.29 |
| 2026-05-18 12:00 |
14:13:49.83 |
-30:11:27.4 |
HIP 69560 |
6.54 |
| 2026-05-19 00:00 |
14:13:48.65 |
-30:11:20.7 |
HIP 69560 |
6.80 |
| 2026-05-19 12:00 |
14:13:47.48 |
-30:11:13.9 |
HIP 69560 |
7.05 |
| 2026-05-20 00:00 |
14:13:46.32 |
-30:11:07.1 |
HIP 69560 |
7.31 |
| 2026-05-20 12:00 |
14:13:45.15 |
-30:11:00.3 |
HIP 69560 |
7.57 |
| 2026-05-21 00:00 |
14:13:44.00 |
-30:10:53.5 |
HIP 69560 |
7.83 |
| 2026-05-21 12:00 |
14:13:42.84 |
-30:10:46.6 |
HIP 69560 |
8.08 |
| 2026-05-22 00:00 |
14:13:41.70 |
-30:10:39.7 |
HIP 69560 |
8.34 |
| 2026-05-22 12:00 |
14:13:40.55 |
-30:10:32.9 |
HIP 69560 |
8.60 |
| 2026-05-23 00:00 |
14:13:39.41 |
-30:10:25.9 |
HIP 69560 |
8.86 |
| 2026-05-23 12:00 |
14:13:38.28 |
-30:10:19.0 |
HIP 69560 |
9.11 |
| 2026-05-24 00:00 |
14:13:37.15 |
-30:10:12.1 |
HIP 69560 |
9.37 |
| 2026-05-24 12:00 |
14:13:36.03 |
-30:10:05.1 |
HIP 69560 |
9.63 |
| 2026-05-25 00:00 |
14:13:34.91 |
-30:09:58.2 |
HIP 69560 |
9.89 |
| 2026-05-25 12:00 |
14:13:33.79 |
-30:09:51.2 |
HIP 69560 |
10.14 |
| 2026-05-26 00:00 |
14:13:32.68 |
-30:09:44.2 |
HIP 69560 |
10.40 |
| 2026-05-26 12:00 |
14:13:31.58 |
-30:09:37.1 |
HIP 69560 |
10.65 |
| 2026-05-27 00:00 |
14:13:30.48 |
-30:09:30.1 |
HIP 69560 |
10.91 |
| 2026-05-27 12:00 |
14:13:29.39 |
-30:09:23.1 |
HIP 69560 |
11.16 |
| 2026-05-28 00:00 |
14:13:28.30 |
-30:09:16.0 |
HIP 69560 |
11.42 |
| 2026-05-28 12:00 |
14:13:27.22 |
-30:09:08.9 |
HIP 69560 |
11.67 |
| 2026-05-29 00:00 |
14:13:26.14 |
-30:09:01.9 |
HIP 69560 |
11.92 |
| 2026-05-29 12:00 |
14:13:25.07 |
-30:08:54.8 |
HIP 69560 |
12.17 |
| 2026-05-30 00:00 |
14:13:24.00 |
-30:08:47.7 |
HIP 69560 |
12.42 |
| 2026-05-30 12:00 |
14:13:22.94 |
-30:08:40.6 |
HIP 69560 |
12.67 |
| 2026-05-31 00:00 |
14:13:21.89 |
-30:08:33.4 |
HIP 69560 |
12.92 |
| 2026-05-31 12:00 |
14:13:20.84 |
-30:08:26.3 |
HIP 69560 |
13.17 |
| 2026-06-01 00:00 |
14:13:19.80 |
-30:08:19.2 |
HIP 69560 |
13.41 |
| 2026-06-01 12:00 |
14:13:18.77 |
-30:08:12.0 |
HIP 69560 |
13.66 |
| 2026-06-02 00:00 |
14:13:17.74 |
-30:08:04.9 |
HIP 69560 |
13.91 |