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) |
| 2026-07-29 00:00 |
16:46:15.73 |
-42:01:42.4 |
HIP 82057 |
13.25 |
| 2026-07-29 12:00 |
16:46:12.64 |
-42:01:17.6 |
HIP 82057 |
13.36 |
| 2026-07-30 00:00 |
16:46:09.59 |
-42:00:52.8 |
HIP 82057 |
13.51 |
| 2026-07-30 12:00 |
16:46:06.57 |
-42:00:28.0 |
HIP 82057 |
13.70 |
| 2026-07-31 00:00 |
16:46:03.61 |
-42:00:03.1 |
HIP 82057 |
13.92 |
| 2026-07-31 12:00 |
16:46:00.68 |
-41:59:38.1 |
HIP 81984 |
13.34 |
| 2026-08-01 00:00 |
16:45:57.80 |
-41:59:13.2 |
HIP 81984 |
12.71 |
| 2026-08-01 12:00 |
16:45:54.96 |
-41:58:48.1 |
HIP 81984 |
12.08 |
| 2026-08-02 00:00 |
16:45:52.16 |
-41:58:23.1 |
HIP 81984 |
11.47 |
| 2026-08-02 12:00 |
16:45:49.41 |
-41:57:58.0 |
HIP 81984 |
10.87 |
| 2026-08-03 00:00 |
16:45:46.70 |
-41:57:32.9 |
HIP 81984 |
10.29 |
| 2026-08-03 12:00 |
16:45:44.03 |
-41:57:07.7 |
HIP 81984 |
9.73 |
| 2026-08-04 00:00 |
16:45:41.41 |
-41:56:42.5 |
HIP 81984 |
9.18 |
| 2026-08-04 12:00 |
16:45:38.83 |
-41:56:17.3 |
HIP 81984 |
8.66 |
| 2026-08-05 00:00 |
16:45:36.30 |
-41:55:52.1 |
HIP 81984 |
8.16 |
| 2026-08-05 12:00 |
16:45:33.81 |
-41:55:26.8 |
HIP 81984 |
7.68 |
| 2026-08-06 00:00 |
16:45:31.36 |
-41:55:01.5 |
HIP 81984 |
7.24 |
| 2026-08-06 12:00 |
16:45:28.96 |
-41:54:36.2 |
HIP 81984 |
6.84 |
| 2026-08-07 00:00 |
16:45:26.61 |
-41:54:10.8 |
HIP 81984 |
6.47 |
| 2026-08-07 12:00 |
16:45:24.30 |
-41:53:45.5 |
HIP 81984 |
6.16 |
| 2026-08-08 00:00 |
16:45:22.03 |
-41:53:20.1 |
HIP 81984 |
5.89 |
| 2026-08-08 12:00 |
16:45:19.81 |
-41:52:54.8 |
HIP 81984 |
5.68 |
| 2026-08-09 00:00 |
16:45:17.64 |
-41:52:29.4 |
HIP 81984 |
5.54 |
| 2026-08-09 12:00 |
16:45:15.51 |
-41:52:04.0 |
HIP 81984 |
5.46 |
| 2026-08-10 00:00 |
16:45:13.43 |
-41:51:38.6 |
HIP 81984 |
5.45 |
| 2026-08-10 12:00 |
16:45:11.39 |
-41:51:13.1 |
HIP 81984 |
5.51 |
| 2026-08-11 00:00 |
16:45:09.40 |
-41:50:47.7 |
HIP 81984 |
5.63 |
| 2026-08-11 12:00 |
16:45:07.46 |
-41:50:22.3 |
HIP 81984 |
5.80 |
| 2026-08-12 00:00 |
16:45:05.57 |
-41:49:56.9 |
HIP 81984 |
6.02 |
| 2026-08-12 12:00 |
16:45:03.72 |
-41:49:31.5 |
HIP 81984 |
6.29 |
| 2026-08-13 00:00 |
16:45:01.92 |
-41:49:06.1 |
HIP 81984 |
6.60 |
| 2026-08-13 12:00 |
16:45:00.16 |
-41:48:40.7 |
HIP 81984 |
6.93 |
| 2026-08-14 00:00 |
16:44:58.45 |
-41:48:15.3 |
HIP 81984 |
7.29 |
| 2026-08-14 12:00 |
16:44:56.79 |
-41:47:49.9 |
HIP 81984 |
7.67 |
| 2026-08-15 00:00 |
16:44:55.18 |
-41:47:24.5 |
HIP 81984 |
8.07 |
| 2026-08-15 12:00 |
16:44:53.61 |
-41:46:59.1 |
HIP 81984 |
8.48 |
| 2026-08-16 00:00 |
16:44:52.10 |
-41:46:33.8 |
HIP 81984 |
8.90 |
| 2026-08-16 12:00 |
16:44:50.63 |
-41:46:08.5 |
HIP 81984 |
9.33 |
| 2026-08-17 00:00 |
16:44:49.20 |
-41:45:43.1 |
HIP 81984 |
9.76 |
| 2026-08-17 12:00 |
16:44:47.83 |
-41:45:17.9 |
HIP 81984 |
10.20 |
| 2026-08-18 00:00 |
16:44:46.50 |
-41:44:52.6 |
HIP 81984 |
10.64 |
| 2026-08-18 12:00 |
16:44:45.22 |
-41:44:27.3 |
HIP 81984 |
11.09 |
| 2026-08-19 00:00 |
16:44:43.99 |
-41:44:02.1 |
HIP 81984 |
11.53 |