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) |
| 2026-05-12 00:00 |
03:57:21.80 |
+15:10:12.5 |
HIP 18576 |
18.42 |
| 2026-05-12 12:00 |
03:58:13.95 |
+15:12:10.2 |
HIP 18576 |
8.68 |
| 2026-05-13 00:00 |
03:59:06.10 |
+15:14:06.8 |
HIP 18576 |
11.64 |
| 2026-05-13 12:00 |
03:59:58.25 |
+15:16:02.2 |
HIP 18730 |
16.75 |
| 2026-05-14 00:00 |
04:00:50.39 |
+15:17:56.6 |
HIP 18730 |
10.67 |
| 2026-05-14 12:00 |
04:01:42.54 |
+15:19:49.8 |
HIP 18843 |
15.83 |
| 2026-05-15 00:00 |
04:02:34.69 |
+15:21:42.0 |
HIP 18843 |
13.82 |
| 2026-05-15 12:00 |
04:03:26.83 |
+15:23:33.0 |
HIP 18843 |
21.31 |
| 2026-05-16 00:00 |
04:04:18.98 |
+15:25:22.9 |
HIP 19120 |
23.66 |
| 2026-05-16 12:00 |
04:05:11.12 |
+15:27:11.6 |
HIP 19120 |
11.00 |
| 2026-05-17 00:00 |
04:06:03.25 |
+15:28:59.2 |
HIP 19120 |
2.14 |
| 2026-05-17 12:00 |
04:06:55.39 |
+15:30:45.7 |
HIP 19207 |
10.75 |
| 2026-05-18 00:00 |
04:07:47.51 |
+15:32:31.0 |
HIP 19207 |
16.70 |
| 2026-05-18 12:00 |
04:08:39.64 |
+15:34:15.2 |
HIP 19451 |
25.66 |
| 2026-05-19 00:00 |
04:09:31.75 |
+15:35:58.2 |
HIP 19451 |
17.17 |
| 2026-05-19 12:00 |
04:10:23.86 |
+15:37:40.1 |
HIP 19548 |
11.23 |
| 2026-05-20 00:00 |
04:11:15.96 |
+15:39:20.9 |
HIP 19548 |
2.21 |
| 2026-05-20 12:00 |
04:12:08.06 |
+15:41:00.4 |
HIP 19548 |
14.27 |
| 2026-05-21 00:00 |
04:13:00.14 |
+15:42:38.8 |
HIP 19548 |
26.88 |
| 2026-05-21 12:00 |
04:13:52.22 |
+15:44:16.1 |
HIP 19822 |
16.56 |
| 2026-05-22 00:00 |
04:14:44.28 |
+15:45:52.2 |
HIP 19822 |
4.34 |
| 2026-05-22 12:00 |
04:15:36.34 |
+15:47:27.1 |
HIP 19862 |
5.11 |
| 2026-05-23 00:00 |
04:16:28.38 |
+15:49:00.9 |
HIP 19862 |
14.75 |
| 2026-05-23 12:00 |
04:17:20.42 |
+15:50:33.4 |
HIP 20082 |
20.42 |
| 2026-05-24 00:00 |
04:18:12.44 |
+15:52:04.8 |
HIP 20082 |
13.32 |
| 2026-05-24 12:00 |
04:19:04.45 |
+15:53:35.1 |
HIP 20082 |
15.99 |
| 2026-05-25 00:00 |
04:19:56.45 |
+15:55:04.1 |
HIP 20290 |
14.06 |
| 2026-05-25 12:00 |
04:20:48.43 |
+15:56:32.0 |
HIP 20290 |
1.61 |
| 2026-05-26 00:00 |
04:21:40.40 |
+15:57:58.7 |
HIP 20290 |
11.13 |
| 2026-05-26 12:00 |
04:22:32.36 |
+15:59:24.3 |
HIP 20389 |
14.71 |
| 2026-05-27 00:00 |
04:23:24.30 |
+16:00:48.6 |
HIP 20485 |
15.02 |
| 2026-05-27 12:00 |
04:24:16.23 |
+16:02:11.8 |
HIP 20605 |
12.35 |
| 2026-05-28 00:00 |
04:25:08.14 |
+16:03:33.7 |
HIP 20661 |
9.97 |
| 2026-05-28 12:00 |
04:26:00.04 |
+16:04:54.5 |
HIP 20661 |
10.06 |
| 2026-05-29 00:00 |
04:26:51.92 |
+16:06:14.1 |
HIP 20661 |
20.43 |
| 2026-05-29 12:00 |
04:27:43.79 |
+16:07:32.5 |
HIP 20885 |
15.63 |
| 2026-05-30 00:00 |
04:28:35.64 |
+16:08:49.8 |
HIP 20916 |
5.83 |
| 2026-05-30 12:00 |
04:29:27.47 |
+16:10:05.8 |
HIP 20916 |
6.69 |
| 2026-05-31 00:00 |
04:30:19.29 |
+16:11:20.6 |
HIP 21029 |
3.44 |
| 2026-05-31 12:00 |
04:31:11.09 |
+16:12:34.3 |
HIP 21053 |
6.89 |
| 2026-06-01 00:00 |
04:32:02.87 |
+16:13:46.7 |
HIP 21053 |
18.91 |
| 2026-06-01 12:00 |
04:32:54.63 |
+16:14:58.0 |
HIP 21257 |
11.33 |
| 2026-06-02 00:00 |
04:33:46.38 |
+16:16:08.0 |
HIP 21257 |
3.83 |