C/1973 W1 (Gibson)
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) |
| 2026-02-03 00:00 |
16:05:35.51 |
-06:15:16.1 |
HIP 78822 |
3.00 |
| 2026-02-03 12:00 |
16:05:36.04 |
-06:15:11.1 |
HIP 78849 |
3.11 |
| 2026-02-04 00:00 |
16:05:36.55 |
-06:15:06.0 |
HIP 78849 |
3.09 |
| 2026-02-04 12:00 |
16:05:37.04 |
-06:15:00.9 |
HIP 78849 |
3.08 |
| 2026-02-05 00:00 |
16:05:37.53 |
-06:14:55.7 |
HIP 78849 |
3.08 |
| 2026-02-05 12:00 |
16:05:38.00 |
-06:14:50.5 |
HIP 78849 |
3.09 |
| 2026-02-06 00:00 |
16:05:38.45 |
-06:14:45.2 |
HIP 78849 |
3.11 |
| 2026-02-06 12:00 |
16:05:38.90 |
-06:14:39.8 |
HIP 78849 |
3.13 |
| 2026-02-07 00:00 |
16:05:39.33 |
-06:14:34.4 |
HIP 78849 |
3.17 |
| 2026-02-07 12:00 |
16:05:39.75 |
-06:14:29.0 |
HIP 78849 |
3.21 |
| 2026-02-08 00:00 |
16:05:40.16 |
-06:14:23.5 |
HIP 78849 |
3.26 |
| 2026-02-08 12:00 |
16:05:40.55 |
-06:14:18.0 |
HIP 78849 |
3.32 |
| 2026-02-09 00:00 |
16:05:40.93 |
-06:14:12.4 |
HIP 78849 |
3.38 |
| 2026-02-09 12:00 |
16:05:41.30 |
-06:14:06.7 |
HIP 78849 |
3.45 |
| 2026-02-10 00:00 |
16:05:41.65 |
-06:14:01.0 |
HIP 78849 |
3.53 |
| 2026-02-10 12:00 |
16:05:41.99 |
-06:13:55.3 |
HIP 78849 |
3.60 |
| 2026-02-11 00:00 |
16:05:42.31 |
-06:13:49.5 |
HIP 78849 |
3.69 |
| 2026-02-11 12:00 |
16:05:42.63 |
-06:13:43.6 |
HIP 78849 |
3.77 |
| 2026-02-12 00:00 |
16:05:42.93 |
-06:13:37.7 |
HIP 78849 |
3.86 |
| 2026-02-12 12:00 |
16:05:43.21 |
-06:13:31.8 |
HIP 78849 |
3.95 |
| 2026-02-13 00:00 |
16:05:43.49 |
-06:13:25.8 |
HIP 78849 |
4.05 |
| 2026-02-13 12:00 |
16:05:43.75 |
-06:13:19.7 |
HIP 78849 |
4.14 |
| 2026-02-14 00:00 |
16:05:43.99 |
-06:13:13.6 |
HIP 78849 |
4.24 |
| 2026-02-14 12:00 |
16:05:44.22 |
-06:13:07.5 |
HIP 78849 |
4.34 |
| 2026-02-15 00:00 |
16:05:44.44 |
-06:13:01.3 |
HIP 78849 |
4.45 |
| 2026-02-15 12:00 |
16:05:44.65 |
-06:12:55.1 |
HIP 78849 |
4.55 |
| 2026-02-16 00:00 |
16:05:44.84 |
-06:12:48.8 |
HIP 78849 |
4.66 |
| 2026-02-16 12:00 |
16:05:45.02 |
-06:12:42.5 |
HIP 78849 |
4.76 |
| 2026-02-17 00:00 |
16:05:45.18 |
-06:12:36.1 |
HIP 78849 |
4.87 |
| 2026-02-17 12:00 |
16:05:45.33 |
-06:12:29.7 |
HIP 78849 |
4.98 |
| 2026-02-18 00:00 |
16:05:45.47 |
-06:12:23.2 |
HIP 78849 |
5.09 |
| 2026-02-18 12:00 |
16:05:45.59 |
-06:12:16.7 |
HIP 78849 |
5.20 |
| 2026-02-19 00:00 |
16:05:45.70 |
-06:12:10.2 |
HIP 78870 |
5.16 |
| 2026-02-19 12:00 |
16:05:45.80 |
-06:12:03.6 |
HIP 78870 |
5.07 |
| 2026-02-20 00:00 |
16:05:45.88 |
-06:11:57.0 |
HIP 78870 |
4.97 |
| 2026-02-20 12:00 |
16:05:45.95 |
-06:11:50.3 |
HIP 78870 |
4.88 |
| 2026-02-21 00:00 |
16:05:46.01 |
-06:11:43.6 |
HIP 78870 |
4.79 |
| 2026-02-21 12:00 |
16:05:46.05 |
-06:11:36.8 |
HIP 78870 |
4.71 |
| 2026-02-22 00:00 |
16:05:46.08 |
-06:11:30.0 |
HIP 78870 |
4.63 |
| 2026-02-22 12:00 |
16:05:46.09 |
-06:11:23.2 |
HIP 78870 |
4.55 |
| 2026-02-23 00:00 |
16:05:46.09 |
-06:11:16.3 |
HIP 78870 |
4.47 |
| 2026-02-23 12:00 |
16:05:46.08 |
-06:11:09.4 |
HIP 78870 |
4.40 |
| 2026-02-24 00:00 |
16:05:46.05 |
-06:11:02.5 |
HIP 78870 |
4.34 |