メタデータ
| 項目 |
値 |
| Designation |
454P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-25T10:55:32.796480Z |
| Orbit solution date (soln_date, UTC) |
2023-02-13T23:14:25Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2013-11-27T13:53:06.720000Z |
| Discovery magnitude (MPC) |
21.40 r |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-08-02.0000000 |
| e |
0.36154433 |
| q (au) |
2.686682 |
| a (au) |
4.208095 |
| i (deg) |
19.806089 |
| Ω (om, deg) |
54.608515 |
| ω (w, deg) |
19.834027 |
| M (ma, deg) |
319.187103 |
等級
散乱 + 全体線形
$$
M_a = (13.082 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.082 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
6.514 |
| 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 |
15:59:52.51 |
-24:50:38.3 |
HIP 78246 |
17.63 |
| 2026-06-01 12:00 |
15:59:33.91 |
-24:50:26.8 |
HIP 78246 |
13.41 |
| 2026-06-02 00:00 |
15:59:15.36 |
-24:50:15.0 |
HIP 78246 |
9.19 |
| 2026-06-02 12:00 |
15:58:56.85 |
-24:50:03.0 |
HIP 78246 |
4.99 |
| 2026-06-03 00:00 |
15:58:38.40 |
-24:49:50.7 |
HIP 78246 |
0.80 |
| 2026-06-03 12:00 |
15:58:20.00 |
-24:49:38.1 |
HIP 78246 |
3.38 |
| 2026-06-04 00:00 |
15:58:01.65 |
-24:49:25.3 |
HIP 78246 |
7.55 |
| 2026-06-04 12:00 |
15:57:43.36 |
-24:49:12.3 |
HIP 78246 |
11.71 |
| 2026-06-05 00:00 |
15:57:25.14 |
-24:48:59.0 |
HIP 78246 |
15.85 |
| 2026-06-05 12:00 |
15:57:06.97 |
-24:48:45.5 |
HIP 78246 |
19.98 |
| 2026-06-06 00:00 |
15:56:48.87 |
-24:48:31.8 |
HIP 78008 |
16.29 |
| 2026-06-06 12:00 |
15:56:30.84 |
-24:48:17.8 |
HIP 78008 |
12.68 |
| 2026-06-07 00:00 |
15:56:12.88 |
-24:48:03.7 |
HIP 78008 |
9.47 |
| 2026-06-07 12:00 |
15:55:55.00 |
-24:47:49.4 |
HIP 78008 |
7.21 |
| 2026-06-08 00:00 |
15:55:37.19 |
-24:47:34.9 |
HIP 78008 |
6.88 |
| 2026-06-08 12:00 |
15:55:19.46 |
-24:47:20.2 |
HIP 78008 |
8.68 |
| 2026-06-09 00:00 |
15:55:01.80 |
-24:47:05.3 |
HIP 78008 |
11.64 |
| 2026-06-09 12:00 |
15:54:44.24 |
-24:46:50.3 |
HIP 78008 |
15.07 |
| 2026-06-10 00:00 |
15:54:26.76 |
-24:46:35.1 |
HIP 77858 |
16.39 |
| 2026-06-10 12:00 |
15:54:09.36 |
-24:46:19.8 |
HIP 77858 |
14.77 |
| 2026-06-11 00:00 |
15:53:52.06 |
-24:46:04.3 |
HIP 77802 |
12.30 |
| 2026-06-11 12:00 |
15:53:34.85 |
-24:45:48.7 |
HIP 77802 |
10.02 |
| 2026-06-12 00:00 |
15:53:17.74 |
-24:45:33.0 |
HIP 77802 |
8.96 |
| 2026-06-12 12:00 |
15:53:00.73 |
-24:45:17.2 |
HIP 77802 |
9.51 |
| 2026-06-13 00:00 |
15:52:43.81 |
-24:45:01.3 |
HIP 77802 |
11.41 |
| 2026-06-13 12:00 |
15:52:27.01 |
-24:44:45.3 |
HIP 77802 |
14.11 |
| 2026-06-14 00:00 |
15:52:10.30 |
-24:44:29.2 |
HIP 77802 |
17.22 |
| 2026-06-14 12:00 |
15:51:53.71 |
-24:44:13.0 |
HIP 77754 |
19.19 |
| 2026-06-15 00:00 |
15:51:37.22 |
-24:43:56.8 |
HIP 77754 |
21.50 |
| 2026-06-15 12:00 |
15:51:20.85 |
-24:43:40.5 |
HIP 77754 |
24.15 |
| 2026-06-16 00:00 |
15:51:04.59 |
-24:43:24.2 |
HIP 77754 |
27.04 |
| 2026-06-16 12:00 |
15:50:48.46 |
-24:43:07.8 |
HIP 77545 |
28.17 |
| 2026-06-17 00:00 |
15:50:32.44 |
-24:42:51.5 |
HIP 77545 |
27.22 |
| 2026-06-17 12:00 |
15:50:16.54 |
-24:42:35.0 |
HIP 77545 |
26.74 |
| 2026-06-18 00:00 |
15:50:00.77 |
-24:42:18.6 |
HIP 77545 |
26.75 |
| 2026-06-18 12:00 |
15:49:45.12 |
-24:42:02.2 |
HIP 77456 |
26.65 |
| 2026-06-19 00:00 |
15:49:29.60 |
-24:41:45.8 |
HIP 77456 |
24.95 |
| 2026-06-19 12:00 |
15:49:14.22 |
-24:41:29.5 |
HIP 77456 |
23.68 |
| 2026-06-20 00:00 |
15:48:58.96 |
-24:41:13.1 |
HIP 77456 |
22.88 |
| 2026-06-20 12:00 |
15:48:43.84 |
-24:40:56.8 |
HIP 77456 |
22.59 |
| 2026-06-21 00:00 |
15:48:28.85 |
-24:40:40.5 |
HIP 77456 |
22.82 |
| 2026-06-21 12:00 |
15:48:14.01 |
-24:40:24.3 |
HIP 77456 |
23.55 |
| 2026-06-22 00:00 |
15:47:59.30 |
-24:40:08.1 |
HIP 77456 |
24.70 |