メタデータ
| 項目 |
値 |
| Designation |
365P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-02-10T18:09:33.384960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:38Z |
| Obs used |
403 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
11.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-12-14.0000000 |
| e |
0.57334364 |
| q (au) |
1.359121 |
| a (au) |
3.185517 |
| i (deg) |
9.836431 |
| Ω (om, deg) |
87.442495 |
| ω (w, deg) |
66.397480 |
| M (ma, deg) |
349.814297 |
等級
散乱 + 全体線形
$$
M_a = (17.429 + 4.999\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.429 |
| n |
4.999 |
| gf |
1.000 |
| gb |
-0.552 |
| 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) |
| 2026-06-01 00:00 |
23:08:42.90 |
-15:15:38.8 |
HIP 114252 |
10.58 |
| 2026-06-01 12:00 |
23:08:51.88 |
-15:15:48.8 |
HIP 114252 |
11.75 |
| 2026-06-02 00:00 |
23:09:00.69 |
-15:15:59.9 |
HIP 114252 |
13.14 |
| 2026-06-02 12:00 |
23:09:09.35 |
-15:16:12.2 |
HIP 114252 |
14.66 |
| 2026-06-03 00:00 |
23:09:17.84 |
-15:16:25.7 |
HIP 114271 |
16.20 |
| 2026-06-03 12:00 |
23:09:26.17 |
-15:16:40.5 |
HIP 114271 |
17.62 |
| 2026-06-04 00:00 |
23:09:34.34 |
-15:16:56.4 |
HIP 114271 |
19.14 |
| 2026-06-04 12:00 |
23:09:42.34 |
-15:17:13.6 |
HIP 114271 |
20.72 |
| 2026-06-05 00:00 |
23:09:50.17 |
-15:17:31.9 |
HIP 114491 |
21.48 |
| 2026-06-05 12:00 |
23:09:57.83 |
-15:17:51.5 |
HIP 114491 |
19.83 |
| 2026-06-06 00:00 |
23:10:05.33 |
-15:18:12.3 |
HIP 114491 |
18.28 |
| 2026-06-06 12:00 |
23:10:12.66 |
-15:18:34.4 |
HIP 114491 |
16.82 |
| 2026-06-07 00:00 |
23:10:19.82 |
-15:18:57.7 |
HIP 114491 |
15.49 |
| 2026-06-07 12:00 |
23:10:26.80 |
-15:19:22.2 |
HIP 114491 |
14.30 |
| 2026-06-08 00:00 |
23:10:33.62 |
-15:19:47.9 |
HIP 114491 |
13.28 |
| 2026-06-08 12:00 |
23:10:40.26 |
-15:20:14.9 |
HIP 114491 |
12.45 |
| 2026-06-09 00:00 |
23:10:46.73 |
-15:20:43.1 |
HIP 114491 |
11.84 |
| 2026-06-09 12:00 |
23:10:53.03 |
-15:21:12.6 |
HIP 114491 |
11.46 |
| 2026-06-10 00:00 |
23:10:59.15 |
-15:21:43.3 |
HIP 114491 |
11.34 |
| 2026-06-10 12:00 |
23:11:05.09 |
-15:22:15.3 |
HIP 114491 |
11.46 |
| 2026-06-11 00:00 |
23:11:10.86 |
-15:22:48.5 |
HIP 114491 |
11.80 |
| 2026-06-11 12:00 |
23:11:16.44 |
-15:23:23.0 |
HIP 114491 |
12.33 |
| 2026-06-12 00:00 |
23:11:21.85 |
-15:23:58.8 |
HIP 114491 |
13.03 |
| 2026-06-12 12:00 |
23:11:27.08 |
-15:24:35.8 |
HIP 114491 |
13.85 |
| 2026-06-13 00:00 |
23:11:32.13 |
-15:25:14.1 |
HIP 114491 |
14.77 |
| 2026-06-13 12:00 |
23:11:36.99 |
-15:25:53.6 |
HIP 114491 |
15.75 |
| 2026-06-14 00:00 |
23:11:41.68 |
-15:26:34.4 |
HIP 114491 |
16.79 |
| 2026-06-14 12:00 |
23:11:46.18 |
-15:27:16.5 |
HIP 114491 |
17.87 |
| 2026-06-15 00:00 |
23:11:50.50 |
-15:27:59.8 |
HIP 114491 |
18.98 |
| 2026-06-15 12:00 |
23:11:54.63 |
-15:28:44.4 |
HIP 114491 |
20.10 |
| 2026-06-16 00:00 |
23:11:58.57 |
-15:29:30.3 |
HIP 114491 |
21.23 |
| 2026-06-16 12:00 |
23:12:02.33 |
-15:30:17.5 |
HIP 114556 |
21.52 |
| 2026-06-17 00:00 |
23:12:05.91 |
-15:31:05.9 |
HIP 114556 |
20.60 |
| 2026-06-17 12:00 |
23:12:09.29 |
-15:31:55.6 |
HIP 114556 |
19.69 |
| 2026-06-18 00:00 |
23:12:12.49 |
-15:32:46.5 |
HIP 114556 |
18.79 |
| 2026-06-18 12:00 |
23:12:15.50 |
-15:33:38.7 |
HIP 114556 |
17.89 |
| 2026-06-19 00:00 |
23:12:18.32 |
-15:34:32.2 |
HIP 114556 |
17.00 |
| 2026-06-19 12:00 |
23:12:20.95 |
-15:35:26.9 |
HIP 114556 |
16.12 |
| 2026-06-20 00:00 |
23:12:23.40 |
-15:36:22.9 |
HIP 114556 |
15.24 |
| 2026-06-20 12:00 |
23:12:25.65 |
-15:37:20.1 |
HIP 114556 |
14.37 |
| 2026-06-21 00:00 |
23:12:27.71 |
-15:38:18.6 |
HIP 114556 |
13.50 |
| 2026-06-21 12:00 |
23:12:29.58 |
-15:39:18.3 |
HIP 114556 |
12.63 |
| 2026-06-22 00:00 |
23:12:31.25 |
-15:40:19.3 |
HIP 114556 |
11.76 |