メタデータ
| 項目 |
値 |
| Designation |
C/2015 W1 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-05-17T04:39:36.486720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:17Z |
| Obs used |
355 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-01-02.0000000 |
| e |
1.00128700 |
| q (au) |
2.231883 |
| a (au) |
-1734.174037 |
| i (deg) |
87.318151 |
| Ω (om, deg) |
114.314858 |
| ω (w, deg) |
48.113799 |
| M (ma, deg) |
-0.001859 |
等級
散乱 + 全体線形
$$
M_a = (14.313 + 2.054\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.313 |
| n |
2.054 |
| gf |
0.983 |
| gb |
-0.916 |
| k |
0.999 |
| δ90 |
1.000 |
| 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) |
| 2026-09-20 00:00 |
19:48:49.33 |
-34:39:46.1 |
HIP 97443 |
6.64 |
| 2026-09-20 12:00 |
19:48:46.82 |
-34:39:42.8 |
HIP 97443 |
6.15 |
| 2026-09-21 00:00 |
19:48:44.36 |
-34:39:39.2 |
HIP 97443 |
5.68 |
| 2026-09-21 12:00 |
19:48:41.94 |
-34:39:35.5 |
HIP 97443 |
5.21 |
| 2026-09-22 00:00 |
19:48:39.57 |
-34:39:31.7 |
HIP 97443 |
4.76 |
| 2026-09-22 12:00 |
19:48:37.25 |
-34:39:27.6 |
HIP 97443 |
4.33 |
| 2026-09-23 00:00 |
19:48:34.97 |
-34:39:23.5 |
HIP 97443 |
3.91 |
| 2026-09-23 12:00 |
19:48:32.74 |
-34:39:19.1 |
HIP 97443 |
3.51 |
| 2026-09-24 00:00 |
19:48:30.56 |
-34:39:14.6 |
HIP 97443 |
3.13 |
| 2026-09-24 12:00 |
19:48:28.42 |
-34:39:09.9 |
HIP 97443 |
2.79 |
| 2026-09-25 00:00 |
19:48:26.34 |
-34:39:05.1 |
HIP 97443 |
2.47 |
| 2026-09-25 12:00 |
19:48:24.29 |
-34:39:00.1 |
HIP 97443 |
2.20 |
| 2026-09-26 00:00 |
19:48:22.30 |
-34:38:55.0 |
HIP 97443 |
1.99 |
| 2026-09-26 12:00 |
19:48:20.35 |
-34:38:49.7 |
HIP 97443 |
1.85 |
| 2026-09-27 00:00 |
19:48:18.46 |
-34:38:44.3 |
HIP 97443 |
1.78 |
| 2026-09-27 12:00 |
19:48:16.60 |
-34:38:38.7 |
HIP 97443 |
1.80 |
| 2026-09-28 00:00 |
19:48:14.80 |
-34:38:32.9 |
HIP 97443 |
1.90 |
| 2026-09-28 12:00 |
19:48:13.05 |
-34:38:27.0 |
HIP 97443 |
2.05 |
| 2026-09-29 00:00 |
19:48:11.34 |
-34:38:21.0 |
HIP 97443 |
2.25 |
| 2026-09-29 12:00 |
19:48:09.68 |
-34:38:14.8 |
HIP 97443 |
2.47 |
| 2026-09-30 00:00 |
19:48:08.07 |
-34:38:08.5 |
HIP 97443 |
2.72 |
| 2026-09-30 12:00 |
19:48:06.50 |
-34:38:02.0 |
HIP 97443 |
2.97 |
| 2026-10-01 00:00 |
19:48:04.99 |
-34:37:55.4 |
HIP 97443 |
3.23 |
| 2026-10-01 12:00 |
19:48:03.52 |
-34:37:48.6 |
HIP 97443 |
3.49 |
| 2026-10-02 00:00 |
19:48:02.11 |
-34:37:41.7 |
HIP 97443 |
3.75 |
| 2026-10-02 12:00 |
19:48:00.74 |
-34:37:34.6 |
HIP 97443 |
4.01 |
| 2026-10-03 00:00 |
19:47:59.42 |
-34:37:27.4 |
HIP 97443 |
4.26 |
| 2026-10-03 12:00 |
19:47:58.14 |
-34:37:20.1 |
HIP 97443 |
4.51 |
| 2026-10-04 00:00 |
19:47:56.92 |
-34:37:12.6 |
HIP 97443 |
4.75 |
| 2026-10-04 12:00 |
19:47:55.75 |
-34:37:05.0 |
HIP 97443 |
4.99 |
| 2026-10-05 00:00 |
19:47:54.63 |
-34:36:57.3 |
HIP 97443 |
5.22 |
| 2026-10-05 12:00 |
19:47:53.55 |
-34:36:49.4 |
HIP 97443 |
5.45 |
| 2026-10-06 00:00 |
19:47:52.53 |
-34:36:41.4 |
HIP 97443 |
5.66 |
| 2026-10-06 12:00 |
19:47:51.55 |
-34:36:33.2 |
HIP 97443 |
5.87 |
| 2026-10-07 00:00 |
19:47:50.62 |
-34:36:24.9 |
HIP 97443 |
6.07 |
| 2026-10-07 12:00 |
19:47:49.75 |
-34:36:16.5 |
HIP 97443 |
6.27 |
| 2026-10-08 00:00 |
19:47:48.92 |
-34:36:08.0 |
HIP 97443 |
6.45 |
| 2026-10-08 12:00 |
19:47:48.14 |
-34:35:59.3 |
HIP 97443 |
6.63 |
| 2026-10-09 00:00 |
19:47:47.41 |
-34:35:50.5 |
HIP 97443 |
6.80 |
| 2026-10-09 12:00 |
19:47:46.74 |
-34:35:41.6 |
HIP 97443 |
6.97 |
| 2026-10-10 00:00 |
19:47:46.11 |
-34:35:32.5 |
HIP 97443 |
7.12 |
| 2026-10-10 12:00 |
19:47:45.53 |
-34:35:23.4 |
HIP 97443 |
7.27 |
| 2026-10-11 00:00 |
19:47:45.00 |
-34:35:14.1 |
HIP 97443 |
7.41 |