メタデータ
| 項目 |
値 |
| Designation |
P/2016 G1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-26T04:39:52.557120Z |
| Orbit solution date (soln_date, UTC) |
2021-08-06T00:42:46Z |
| Obs used |
147 |
| NEO |
- |
| M1 |
16.100 |
| 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) |
2016-04-30.0000000 |
| e |
0.21010208 |
| q (au) |
2.040494 |
| a (au) |
2.583238 |
| i (deg) |
10.967835 |
| Ω (om, deg) |
204.074723 |
| ω (w, deg) |
111.280022 |
| M (ma, deg) |
295.621914 |
等級
散乱 + 全体線形
$$
M_a = (15.642 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.642 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.903 |
| 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
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) |
| 2026-07-29 00:00 |
06:07:46.30 |
+16:16:28.6 |
HIP 28978 |
13.31 |
| 2026-07-29 12:00 |
06:08:32.15 |
+16:15:21.0 |
HIP 28980 |
23.52 |
| 2026-07-30 00:00 |
06:09:17.91 |
+16:14:12.2 |
HIP 29274 |
24.16 |
| 2026-07-30 12:00 |
06:10:03.58 |
+16:13:02.4 |
HIP 29274 |
18.86 |
| 2026-07-31 00:00 |
06:10:49.17 |
+16:11:51.4 |
HIP 29434 |
18.24 |
| 2026-07-31 12:00 |
06:11:34.67 |
+16:10:39.4 |
HIP 29434 |
7.43 |
| 2026-08-01 00:00 |
06:12:20.07 |
+16:09:26.3 |
HIP 29434 |
4.34 |
| 2026-08-01 12:00 |
06:13:05.39 |
+16:08:12.1 |
HIP 29434 |
14.92 |
| 2026-08-02 00:00 |
06:13:50.61 |
+16:06:56.9 |
HIP 29637 |
13.51 |
| 2026-08-02 12:00 |
06:14:35.75 |
+16:05:40.5 |
HIP 29637 |
3.90 |
| 2026-08-03 00:00 |
06:15:20.79 |
+16:04:23.1 |
HIP 29704 |
4.33 |
| 2026-08-03 12:00 |
06:16:05.73 |
+16:03:04.6 |
HIP 29704 |
11.20 |
| 2026-08-04 00:00 |
06:16:50.59 |
+16:01:45.1 |
HIP 29849 |
11.36 |
| 2026-08-04 12:00 |
06:17:35.34 |
+16:00:24.5 |
HIP 29849 |
11.69 |
| 2026-08-05 00:00 |
06:18:20.01 |
+15:59:02.8 |
HIP 30067 |
19.35 |
| 2026-08-05 12:00 |
06:19:04.57 |
+15:57:40.1 |
HIP 30067 |
9.11 |
| 2026-08-06 00:00 |
06:19:49.04 |
+15:56:16.3 |
HIP 30067 |
5.00 |
| 2026-08-06 12:00 |
06:20:33.41 |
+15:54:51.5 |
HIP 30155 |
13.42 |
| 2026-08-07 00:00 |
06:21:17.68 |
+15:53:25.6 |
HIP 30155 |
14.39 |
| 2026-08-07 12:00 |
06:22:01.85 |
+15:51:58.7 |
HIP 30363 |
16.25 |
| 2026-08-08 00:00 |
06:22:45.92 |
+15:50:30.8 |
HIP 30363 |
5.59 |
| 2026-08-08 12:00 |
06:23:29.89 |
+15:49:01.8 |
HIP 30363 |
5.21 |
| 2026-08-09 00:00 |
06:24:13.75 |
+15:47:31.7 |
HIP 30460 |
3.56 |
| 2026-08-09 12:00 |
06:24:57.51 |
+15:46:00.7 |
HIP 30460 |
12.12 |
| 2026-08-10 00:00 |
06:25:41.17 |
+15:44:28.6 |
HIP 30663 |
18.87 |
| 2026-08-10 12:00 |
06:26:24.72 |
+15:42:55.5 |
HIP 30663 |
11.92 |
| 2026-08-11 00:00 |
06:27:08.16 |
+15:41:21.5 |
HIP 30663 |
12.34 |
| 2026-08-11 12:00 |
06:27:51.50 |
+15:39:46.3 |
HIP 30663 |
19.63 |
| 2026-08-12 00:00 |
06:28:34.72 |
+15:38:10.2 |
HIP 30819 |
24.70 |
| 2026-08-12 12:00 |
06:29:17.84 |
+15:36:33.1 |
HIP 30819 |
28.78 |
| 2026-08-13 00:00 |
06:30:00.84 |
+15:34:55.0 |
HIP 31098 |
24.24 |
| 2026-08-13 12:00 |
06:30:43.74 |
+15:33:15.9 |
HIP 31098 |
14.33 |
| 2026-08-14 00:00 |
06:31:26.52 |
+15:31:35.9 |
HIP 31098 |
6.47 |
| 2026-08-14 12:00 |
06:32:09.18 |
+15:29:54.8 |
HIP 31098 |
9.79 |
| 2026-08-15 00:00 |
06:32:51.73 |
+15:28:12.8 |
HIP 31164 |
16.01 |
| 2026-08-15 12:00 |
06:33:34.17 |
+15:26:29.8 |
HIP 31404 |
21.15 |
| 2026-08-16 00:00 |
06:34:16.49 |
+15:24:45.9 |
HIP 31404 |
11.04 |
| 2026-08-16 12:00 |
06:34:58.69 |
+15:23:01.0 |
HIP 31404 |
3.20 |
| 2026-08-17 00:00 |
06:35:40.77 |
+15:21:15.1 |
HIP 31404 |
10.54 |
| 2026-08-17 12:00 |
06:36:22.74 |
+15:19:28.3 |
HIP 31404 |
20.57 |
| 2026-08-18 00:00 |
06:37:04.58 |
+15:17:40.6 |
HIP 31802 |
27.35 |
| 2026-08-18 12:00 |
06:37:46.30 |
+15:15:51.9 |
HIP 31802 |
17.13 |
| 2026-08-19 00:00 |
06:38:27.90 |
+15:14:02.3 |
HIP 31802 |
6.94 |