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 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
17:04:43.90 |
-42:22:24.0 |
HIP 83403 |
23.02 |
| 2026-03-26 12:00 |
17:04:42.43 |
-42:22:41.0 |
HIP 83403 |
22.85 |
| 2026-03-27 00:00 |
17:04:40.91 |
-42:22:57.9 |
HIP 83403 |
22.69 |
| 2026-03-27 12:00 |
17:04:39.34 |
-42:23:14.7 |
HIP 83403 |
22.51 |
| 2026-03-28 00:00 |
17:04:37.72 |
-42:23:31.4 |
HIP 83403 |
22.34 |
| 2026-03-28 12:00 |
17:04:36.06 |
-42:23:47.9 |
HIP 83403 |
22.16 |
| 2026-03-29 00:00 |
17:04:34.34 |
-42:24:04.4 |
HIP 83403 |
21.98 |
| 2026-03-29 12:00 |
17:04:32.57 |
-42:24:20.7 |
HIP 83403 |
21.80 |
| 2026-03-30 00:00 |
17:04:30.75 |
-42:24:36.9 |
HIP 83403 |
21.61 |
| 2026-03-30 12:00 |
17:04:28.89 |
-42:24:53.0 |
HIP 83403 |
21.43 |
| 2026-03-31 00:00 |
17:04:26.97 |
-42:25:09.0 |
HIP 83403 |
21.24 |
| 2026-03-31 12:00 |
17:04:25.01 |
-42:25:24.9 |
HIP 83403 |
21.05 |
| 2026-04-01 00:00 |
17:04:22.99 |
-42:25:40.6 |
HIP 83403 |
20.86 |
| 2026-04-01 12:00 |
17:04:20.93 |
-42:25:56.3 |
HIP 83403 |
20.67 |
| 2026-04-02 00:00 |
17:04:18.82 |
-42:26:11.8 |
HIP 83403 |
20.48 |
| 2026-04-02 12:00 |
17:04:16.66 |
-42:26:27.2 |
HIP 83403 |
20.29 |
| 2026-04-03 00:00 |
17:04:14.46 |
-42:26:42.4 |
HIP 83403 |
20.10 |
| 2026-04-03 12:00 |
17:04:12.20 |
-42:26:57.5 |
HIP 83403 |
19.91 |
| 2026-04-04 00:00 |
17:04:09.90 |
-42:27:12.5 |
HIP 83403 |
19.73 |
| 2026-04-04 12:00 |
17:04:07.55 |
-42:27:27.4 |
HIP 83403 |
19.54 |
| 2026-04-05 00:00 |
17:04:05.16 |
-42:27:42.1 |
HIP 83403 |
19.36 |
| 2026-04-05 12:00 |
17:04:02.71 |
-42:27:56.7 |
HIP 83403 |
19.19 |
| 2026-04-06 00:00 |
17:04:00.22 |
-42:28:11.2 |
HIP 83403 |
19.02 |
| 2026-04-06 12:00 |
17:03:57.68 |
-42:28:25.5 |
HIP 83403 |
18.85 |
| 2026-04-07 00:00 |
17:03:55.10 |
-42:28:39.7 |
HIP 83403 |
18.69 |
| 2026-04-07 12:00 |
17:03:52.47 |
-42:28:53.8 |
HIP 83403 |
18.53 |
| 2026-04-08 00:00 |
17:03:49.79 |
-42:29:07.7 |
HIP 83403 |
18.39 |
| 2026-04-08 12:00 |
17:03:47.07 |
-42:29:21.5 |
HIP 83403 |
18.25 |
| 2026-04-09 00:00 |
17:03:44.30 |
-42:29:35.1 |
HIP 83403 |
18.12 |
| 2026-04-09 12:00 |
17:03:41.48 |
-42:29:48.5 |
HIP 83403 |
18.00 |
| 2026-04-10 00:00 |
17:03:38.62 |
-42:30:01.9 |
HIP 83358 |
17.44 |
| 2026-04-10 12:00 |
17:03:35.72 |
-42:30:15.1 |
HIP 83358 |
16.86 |
| 2026-04-11 00:00 |
17:03:32.76 |
-42:30:28.1 |
HIP 83358 |
16.27 |
| 2026-04-11 12:00 |
17:03:29.77 |
-42:30:41.0 |
HIP 83358 |
15.68 |
| 2026-04-12 00:00 |
17:03:26.73 |
-42:30:53.7 |
HIP 83358 |
15.09 |
| 2026-04-12 12:00 |
17:03:23.64 |
-42:31:06.3 |
HIP 83358 |
14.49 |
| 2026-04-13 00:00 |
17:03:20.51 |
-42:31:18.7 |
HIP 83358 |
13.88 |
| 2026-04-13 12:00 |
17:03:17.34 |
-42:31:30.9 |
HIP 83358 |
13.27 |
| 2026-04-14 00:00 |
17:03:14.12 |
-42:31:43.0 |
HIP 83358 |
12.65 |
| 2026-04-14 12:00 |
17:03:10.86 |
-42:31:55.0 |
HIP 83358 |
12.03 |
| 2026-04-15 00:00 |
17:03:07.56 |
-42:32:06.7 |
HIP 83358 |
11.40 |
| 2026-04-15 12:00 |
17:03:04.21 |
-42:32:18.3 |
HIP 83358 |
10.77 |
| 2026-04-16 00:00 |
17:03:00.82 |
-42:32:29.8 |
HIP 83358 |
10.13 |