メタデータ
| 項目 |
値 |
| Designation |
C/2014 R4 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-10-21T12:21:03.185280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
28.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-10-17.0000000 |
| e |
0.99942874 |
| q (au) |
1.817966 |
| a (au) |
3182.405214 |
| i (deg) |
42.411578 |
| Ω (om, deg) |
279.529966 |
| ω (w, deg) |
180.840887 |
| M (ma, deg) |
359.999975 |
等級
散乱 + 全体線形
$$
M_a = (15.263 + 4.690\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.263 |
| n |
4.690 |
| gf |
0.999 |
| 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) |
| 2026-09-20 00:00 |
16:45:04.98 |
-41:19:17.0 |
HIP 82094 |
13.80 |
| 2026-09-20 12:00 |
16:45:06.84 |
-41:18:56.8 |
HIP 82094 |
13.34 |
| 2026-09-21 00:00 |
16:45:08.74 |
-41:18:36.8 |
HIP 82094 |
12.88 |
| 2026-09-21 12:00 |
16:45:10.69 |
-41:18:16.9 |
HIP 82094 |
12.41 |
| 2026-09-22 00:00 |
16:45:12.68 |
-41:17:57.1 |
HIP 82094 |
11.93 |
| 2026-09-22 12:00 |
16:45:14.71 |
-41:17:37.4 |
HIP 82094 |
11.46 |
| 2026-09-23 00:00 |
16:45:16.79 |
-41:17:17.9 |
HIP 82094 |
10.97 |
| 2026-09-23 12:00 |
16:45:18.92 |
-41:16:58.4 |
HIP 82094 |
10.48 |
| 2026-09-24 00:00 |
16:45:21.09 |
-41:16:39.1 |
HIP 82094 |
9.99 |
| 2026-09-24 12:00 |
16:45:23.30 |
-41:16:20.0 |
HIP 82094 |
9.49 |
| 2026-09-25 00:00 |
16:45:25.55 |
-41:16:00.9 |
HIP 82094 |
8.99 |
| 2026-09-25 12:00 |
16:45:27.85 |
-41:15:42.0 |
HIP 82094 |
8.48 |
| 2026-09-26 00:00 |
16:45:30.19 |
-41:15:23.3 |
HIP 82094 |
7.98 |
| 2026-09-26 12:00 |
16:45:32.57 |
-41:15:04.6 |
HIP 82094 |
7.46 |
| 2026-09-27 00:00 |
16:45:35.00 |
-41:14:46.1 |
HIP 82094 |
6.95 |
| 2026-09-27 12:00 |
16:45:37.47 |
-41:14:27.7 |
HIP 82094 |
6.43 |
| 2026-09-28 00:00 |
16:45:39.98 |
-41:14:09.5 |
HIP 82094 |
5.92 |
| 2026-09-28 12:00 |
16:45:42.53 |
-41:13:51.4 |
HIP 82094 |
5.40 |
| 2026-09-29 00:00 |
16:45:45.13 |
-41:13:33.4 |
HIP 82094 |
4.89 |
| 2026-09-29 12:00 |
16:45:47.77 |
-41:13:15.6 |
HIP 82094 |
4.38 |
| 2026-09-30 00:00 |
16:45:50.45 |
-41:12:57.9 |
HIP 82094 |
3.89 |
| 2026-09-30 12:00 |
16:45:53.17 |
-41:12:40.3 |
HIP 82094 |
3.42 |
| 2026-10-01 00:00 |
16:45:55.93 |
-41:12:22.9 |
HIP 82094 |
2.98 |
| 2026-10-01 12:00 |
16:45:58.73 |
-41:12:05.6 |
HIP 82094 |
2.60 |
| 2026-10-02 00:00 |
16:46:01.58 |
-41:11:48.4 |
HIP 82094 |
2.31 |
| 2026-10-02 12:00 |
16:46:04.46 |
-41:11:31.4 |
HIP 82094 |
2.14 |
| 2026-10-03 00:00 |
16:46:07.39 |
-41:11:14.6 |
HIP 82094 |
2.14 |
| 2026-10-03 12:00 |
16:46:10.35 |
-41:10:57.9 |
HIP 82094 |
2.30 |
| 2026-10-04 00:00 |
16:46:13.36 |
-41:10:41.3 |
HIP 82094 |
2.61 |
| 2026-10-04 12:00 |
16:46:16.41 |
-41:10:24.9 |
HIP 82094 |
3.02 |
| 2026-10-05 00:00 |
16:46:19.49 |
-41:10:08.6 |
HIP 82094 |
3.50 |
| 2026-10-05 12:00 |
16:46:22.62 |
-41:09:52.4 |
HIP 82094 |
4.03 |
| 2026-10-06 00:00 |
16:46:25.79 |
-41:09:36.5 |
HIP 82094 |
4.59 |
| 2026-10-06 12:00 |
16:46:28.99 |
-41:09:20.6 |
HIP 82094 |
5.17 |
| 2026-10-07 00:00 |
16:46:32.24 |
-41:09:04.9 |
HIP 82094 |
5.77 |
| 2026-10-07 12:00 |
16:46:35.52 |
-41:08:49.4 |
HIP 82094 |
6.39 |
| 2026-10-08 00:00 |
16:46:38.85 |
-41:08:34.0 |
HIP 82094 |
7.03 |
| 2026-10-08 12:00 |
16:46:42.21 |
-41:08:18.7 |
HIP 82094 |
7.67 |
| 2026-10-09 00:00 |
16:46:45.61 |
-41:08:03.6 |
HIP 82094 |
8.32 |
| 2026-10-09 12:00 |
16:46:49.05 |
-41:07:48.7 |
HIP 82094 |
8.99 |
| 2026-10-10 00:00 |
16:46:52.52 |
-41:07:33.9 |
HIP 82094 |
9.66 |
| 2026-10-10 12:00 |
16:46:56.03 |
-41:07:19.3 |
HIP 82094 |
10.34 |
| 2026-10-11 00:00 |
16:46:59.59 |
-41:07:04.8 |
HIP 82094 |
11.03 |