メタデータ
| 項目 |
値 |
| Designation |
C/1973 W1 (Gibson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1973-08-09T22:26:06.357120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
21 |
| 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) |
1974-03-23.0000000 |
| e |
1.00046050 |
| q (au) |
3.842303 |
| a (au) |
-8343.718944 |
| i (deg) |
108.064665 |
| Ω (om, deg) |
244.597443 |
| ω (w, deg) |
221.267469 |
| M (ma, deg) |
0.000291 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
16:02:22.44 |
-05:47:20.6 |
HIP 78624 |
10.57 |
| 2026-06-01 12:00 |
16:02:20.90 |
-05:47:16.1 |
HIP 78624 |
10.96 |
| 2026-06-02 00:00 |
16:02:19.37 |
-05:47:11.7 |
HIP 78509 |
11.28 |
| 2026-06-02 12:00 |
16:02:17.84 |
-05:47:07.3 |
HIP 78509 |
10.91 |
| 2026-06-03 00:00 |
16:02:16.31 |
-05:47:03.0 |
HIP 78509 |
10.55 |
| 2026-06-03 12:00 |
16:02:14.78 |
-05:46:58.8 |
HIP 78509 |
10.19 |
| 2026-06-04 00:00 |
16:02:13.26 |
-05:46:54.6 |
HIP 78509 |
9.83 |
| 2026-06-04 12:00 |
16:02:11.73 |
-05:46:50.4 |
HIP 78509 |
9.47 |
| 2026-06-05 00:00 |
16:02:10.21 |
-05:46:46.3 |
HIP 78509 |
9.12 |
| 2026-06-05 12:00 |
16:02:08.70 |
-05:46:42.3 |
HIP 78509 |
8.77 |
| 2026-06-06 00:00 |
16:02:07.18 |
-05:46:38.3 |
HIP 78509 |
8.42 |
| 2026-06-06 12:00 |
16:02:05.67 |
-05:46:34.4 |
HIP 78509 |
8.08 |
| 2026-06-07 00:00 |
16:02:04.16 |
-05:46:30.5 |
HIP 78509 |
7.75 |
| 2026-06-07 12:00 |
16:02:02.66 |
-05:46:26.7 |
HIP 78509 |
7.42 |
| 2026-06-08 00:00 |
16:02:01.16 |
-05:46:23.0 |
HIP 78509 |
7.09 |
| 2026-06-08 12:00 |
16:01:59.66 |
-05:46:19.3 |
HIP 78509 |
6.77 |
| 2026-06-09 00:00 |
16:01:58.16 |
-05:46:15.7 |
HIP 78509 |
6.47 |
| 2026-06-09 12:00 |
16:01:56.67 |
-05:46:12.1 |
HIP 78509 |
6.16 |
| 2026-06-10 00:00 |
16:01:55.18 |
-05:46:08.6 |
HIP 78509 |
5.87 |
| 2026-06-10 12:00 |
16:01:53.70 |
-05:46:05.2 |
HIP 78509 |
5.60 |
| 2026-06-11 00:00 |
16:01:52.22 |
-05:46:01.8 |
HIP 78509 |
5.33 |
| 2026-06-11 12:00 |
16:01:50.74 |
-05:45:58.5 |
HIP 78509 |
5.08 |
| 2026-06-12 00:00 |
16:01:49.27 |
-05:45:55.2 |
HIP 78509 |
4.84 |
| 2026-06-12 12:00 |
16:01:47.80 |
-05:45:52.0 |
HIP 78509 |
4.63 |
| 2026-06-13 00:00 |
16:01:46.34 |
-05:45:48.9 |
HIP 78509 |
4.43 |
| 2026-06-13 12:00 |
16:01:44.88 |
-05:45:45.8 |
HIP 78509 |
4.26 |
| 2026-06-14 00:00 |
16:01:43.42 |
-05:45:42.8 |
HIP 78509 |
4.12 |
| 2026-06-14 12:00 |
16:01:41.97 |
-05:45:39.8 |
HIP 78509 |
4.01 |
| 2026-06-15 00:00 |
16:01:40.52 |
-05:45:36.9 |
HIP 78509 |
3.93 |
| 2026-06-15 12:00 |
16:01:39.08 |
-05:45:34.1 |
HIP 78509 |
3.88 |
| 2026-06-16 00:00 |
16:01:37.65 |
-05:45:31.3 |
HIP 78509 |
3.87 |
| 2026-06-16 12:00 |
16:01:36.22 |
-05:45:28.6 |
HIP 78509 |
3.89 |
| 2026-06-17 00:00 |
16:01:34.79 |
-05:45:25.9 |
HIP 78509 |
3.94 |
| 2026-06-17 12:00 |
16:01:33.37 |
-05:45:23.3 |
HIP 78509 |
4.02 |
| 2026-06-18 00:00 |
16:01:31.96 |
-05:45:20.8 |
HIP 78509 |
4.14 |
| 2026-06-18 12:00 |
16:01:30.55 |
-05:45:18.3 |
HIP 78509 |
4.28 |
| 2026-06-19 00:00 |
16:01:29.14 |
-05:45:15.9 |
HIP 78509 |
4.44 |
| 2026-06-19 12:00 |
16:01:27.75 |
-05:45:13.6 |
HIP 78509 |
4.63 |
| 2026-06-20 00:00 |
16:01:26.36 |
-05:45:11.3 |
HIP 78509 |
4.83 |
| 2026-06-20 12:00 |
16:01:24.97 |
-05:45:09.1 |
HIP 78509 |
5.05 |
| 2026-06-21 00:00 |
16:01:23.59 |
-05:45:07.0 |
HIP 78509 |
5.28 |
| 2026-06-21 12:00 |
16:01:22.22 |
-05:45:04.9 |
HIP 78509 |
5.53 |
| 2026-06-22 00:00 |
16:01:20.85 |
-05:45:02.8 |
HIP 78509 |
5.78 |