メタデータ
| 項目 |
値 |
| Designation |
P/2016 R4 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-07-20T12:01:25.501440Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:38Z |
| Obs used |
196 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-09-22.0000000 |
| e |
0.47506023 |
| q (au) |
2.800531 |
| a (au) |
5.334957 |
| i (deg) |
10.862086 |
| Ω (om, deg) |
168.346862 |
| ω (w, deg) |
174.058692 |
| M (ma, deg) |
5.078958 |
等級
散乱 + 全体線形
$$
M_a = (16.381 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.381 |
| n |
2.000 |
| gf |
0.833 |
| gb |
-0.660 |
| k |
0.903 |
| δ90 |
1.118 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
14:25:56.93 |
-06:10:19.8 |
HIP 70680 |
21.97 |
| 2026-09-20 12:00 |
14:26:17.57 |
-06:12:17.4 |
HIP 70680 |
17.37 |
| 2026-09-21 00:00 |
14:26:38.30 |
-06:14:15.0 |
HIP 70680 |
13.45 |
| 2026-09-21 12:00 |
14:26:59.12 |
-06:16:12.7 |
HIP 70680 |
10.98 |
| 2026-09-22 00:00 |
14:27:20.01 |
-06:18:10.5 |
HIP 70680 |
11.02 |
| 2026-09-22 12:00 |
14:27:40.99 |
-06:20:08.4 |
HIP 70680 |
13.57 |
| 2026-09-23 00:00 |
14:28:02.06 |
-06:22:06.3 |
HIP 70680 |
17.59 |
| 2026-09-23 12:00 |
14:28:23.21 |
-06:24:04.3 |
HIP 70680 |
22.31 |
| 2026-09-24 00:00 |
14:28:44.43 |
-06:26:02.3 |
HIP 70680 |
27.38 |
| 2026-09-24 12:00 |
14:29:05.74 |
-06:28:00.4 |
HIP 70794 |
26.69 |
| 2026-09-25 00:00 |
14:29:27.13 |
-06:29:58.5 |
HIP 70794 |
26.56 |
| 2026-09-25 12:00 |
14:29:48.60 |
-06:31:56.7 |
HIP 70794 |
27.63 |
| 2026-09-26 00:00 |
14:30:10.15 |
-06:33:54.9 |
HIP 70794 |
29.77 |
| 2026-09-26 12:00 |
14:30:31.78 |
-06:35:53.1 |
HIP 70913 |
29.00 |
| 2026-09-27 00:00 |
14:30:53.49 |
-06:37:51.3 |
HIP 70913 |
28.71 |
| 2026-09-27 12:00 |
14:31:15.27 |
-06:39:49.5 |
HIP 70913 |
29.58 |
| 2026-09-28 00:00 |
14:31:37.13 |
-06:41:47.8 |
HIP 71169 |
29.56 |
| 2026-09-28 12:00 |
14:31:59.07 |
-06:43:46.1 |
HIP 71169 |
23.86 |
| 2026-09-29 00:00 |
14:32:21.09 |
-06:45:44.3 |
HIP 71169 |
18.20 |
| 2026-09-29 12:00 |
14:32:43.18 |
-06:47:42.6 |
HIP 71169 |
12.67 |
| 2026-09-30 00:00 |
14:33:05.35 |
-06:49:40.9 |
HIP 71169 |
7.58 |
| 2026-09-30 12:00 |
14:33:27.59 |
-06:51:39.1 |
HIP 71199 |
3.42 |
| 2026-10-01 00:00 |
14:33:49.91 |
-06:53:37.4 |
HIP 71199 |
2.58 |
| 2026-10-01 12:00 |
14:34:12.30 |
-06:55:35.6 |
HIP 71199 |
8.43 |
| 2026-10-02 00:00 |
14:34:34.76 |
-06:57:33.8 |
HIP 71199 |
14.33 |
| 2026-10-02 12:00 |
14:34:57.30 |
-06:59:32.0 |
HIP 71199 |
20.26 |
| 2026-10-03 00:00 |
14:35:19.91 |
-07:01:30.1 |
HIP 71199 |
26.20 |
| 2026-10-03 12:00 |
14:35:42.60 |
-07:03:28.3 |
HIP 71199 |
32.17 |
| 2026-10-04 00:00 |
14:36:05.35 |
-07:05:26.3 |
HIP 71600 |
37.54 |
| 2026-10-04 12:00 |
14:36:28.18 |
-07:07:24.3 |
HIP 71600 |
31.72 |
| 2026-10-05 00:00 |
14:36:51.07 |
-07:09:22.3 |
HIP 71600 |
25.95 |
| 2026-10-05 12:00 |
14:37:14.04 |
-07:11:20.2 |
HIP 71600 |
20.31 |
| 2026-10-06 00:00 |
14:37:37.08 |
-07:13:18.1 |
HIP 71600 |
14.96 |
| 2026-10-06 12:00 |
14:38:00.18 |
-07:15:15.9 |
HIP 71600 |
10.39 |
| 2026-10-07 00:00 |
14:38:23.36 |
-07:17:13.6 |
HIP 71600 |
8.07 |
| 2026-10-07 12:00 |
14:38:46.60 |
-07:19:11.2 |
HIP 71600 |
9.81 |
| 2026-10-08 00:00 |
14:39:09.91 |
-07:21:08.7 |
HIP 71600 |
14.20 |
| 2026-10-08 12:00 |
14:39:33.29 |
-07:23:06.2 |
HIP 71720 |
12.56 |
| 2026-10-09 00:00 |
14:39:56.73 |
-07:25:03.5 |
HIP 71720 |
7.10 |
| 2026-10-09 12:00 |
14:40:20.24 |
-07:27:00.8 |
HIP 71720 |
4.29 |
| 2026-10-10 00:00 |
14:40:43.81 |
-07:28:58.0 |
HIP 71720 |
7.88 |
| 2026-10-10 12:00 |
14:41:07.44 |
-07:30:55.0 |
HIP 71720 |
13.50 |
| 2026-10-11 00:00 |
14:41:31.14 |
-07:32:51.9 |
HIP 71720 |
19.47 |