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) |
| 2026-09-20 00:00 |
15:51:17.16 |
-25:30:31.9 |
HIP 77576 |
13.78 |
| 2026-09-20 12:00 |
15:51:32.98 |
-25:31:28.2 |
HIP 77635 |
15.64 |
| 2026-09-21 00:00 |
15:51:48.93 |
-25:32:24.7 |
HIP 77635 |
16.98 |
| 2026-09-21 12:00 |
15:52:05.00 |
-25:33:21.6 |
HIP 77635 |
18.98 |
| 2026-09-22 00:00 |
15:52:21.19 |
-25:34:18.8 |
HIP 77635 |
21.47 |
| 2026-09-22 12:00 |
15:52:37.50 |
-25:35:16.3 |
HIP 77840 |
20.58 |
| 2026-09-23 00:00 |
15:52:53.94 |
-25:36:14.1 |
HIP 77840 |
19.21 |
| 2026-09-23 12:00 |
15:53:10.49 |
-25:37:12.2 |
HIP 77840 |
18.55 |
| 2026-09-24 00:00 |
15:53:27.17 |
-25:38:10.6 |
HIP 77840 |
18.68 |
| 2026-09-24 12:00 |
15:53:43.96 |
-25:39:09.4 |
HIP 77840 |
19.60 |
| 2026-09-25 00:00 |
15:54:00.87 |
-25:40:08.4 |
HIP 77955 |
17.39 |
| 2026-09-25 12:00 |
15:54:17.90 |
-25:41:07.7 |
HIP 77955 |
13.48 |
| 2026-09-26 00:00 |
15:54:35.05 |
-25:42:07.3 |
HIP 77955 |
9.58 |
| 2026-09-26 12:00 |
15:54:52.31 |
-25:43:07.2 |
HIP 77955 |
5.78 |
| 2026-09-27 00:00 |
15:55:09.68 |
-25:44:07.3 |
HIP 77955 |
2.67 |
| 2026-09-27 12:00 |
15:55:27.17 |
-25:45:07.8 |
HIP 77955 |
3.70 |
| 2026-09-28 00:00 |
15:55:44.78 |
-25:46:08.5 |
HIP 77955 |
7.32 |
| 2026-09-28 12:00 |
15:56:02.49 |
-25:47:09.5 |
HIP 78041 |
9.00 |
| 2026-09-29 00:00 |
15:56:20.32 |
-25:48:10.8 |
HIP 78041 |
8.67 |
| 2026-09-29 12:00 |
15:56:38.26 |
-25:49:12.3 |
HIP 78041 |
10.18 |
| 2026-09-30 00:00 |
15:56:56.31 |
-25:50:14.1 |
HIP 78041 |
12.94 |
| 2026-09-30 12:00 |
15:57:14.47 |
-25:51:16.2 |
HIP 78041 |
16.34 |
| 2026-10-01 00:00 |
15:57:32.74 |
-25:52:18.5 |
HIP 78041 |
20.07 |
| 2026-10-01 12:00 |
15:57:51.12 |
-25:53:21.1 |
HIP 78265 |
19.07 |
| 2026-10-02 00:00 |
15:58:09.61 |
-25:54:23.9 |
HIP 78265 |
15.55 |
| 2026-10-02 12:00 |
15:58:28.20 |
-25:55:26.9 |
HIP 78265 |
12.50 |
| 2026-10-03 00:00 |
15:58:46.90 |
-25:56:30.3 |
HIP 78265 |
10.38 |
| 2026-10-03 12:00 |
15:59:05.71 |
-25:57:33.8 |
HIP 78265 |
9.84 |
| 2026-10-04 00:00 |
15:59:24.63 |
-25:58:37.6 |
HIP 78265 |
11.14 |
| 2026-10-04 12:00 |
15:59:43.65 |
-25:59:41.6 |
HIP 78385 |
12.36 |
| 2026-10-05 00:00 |
16:00:02.77 |
-26:00:45.9 |
HIP 78385 |
9.81 |
| 2026-10-05 12:00 |
16:00:22.00 |
-26:01:50.4 |
HIP 78385 |
8.88 |
| 2026-10-06 00:00 |
16:00:41.33 |
-26:02:55.1 |
HIP 78385 |
10.06 |
| 2026-10-06 12:00 |
16:01:00.76 |
-26:04:00.0 |
HIP 78385 |
12.81 |
| 2026-10-07 00:00 |
16:01:20.30 |
-26:05:05.2 |
HIP 78563 |
15.90 |
| 2026-10-07 12:00 |
16:01:39.93 |
-26:06:10.5 |
HIP 78563 |
11.36 |
| 2026-10-08 00:00 |
16:01:59.67 |
-26:07:16.1 |
HIP 78563 |
6.79 |
| 2026-10-08 12:00 |
16:02:19.50 |
-26:08:21.9 |
HIP 78563 |
2.21 |
| 2026-10-09 00:00 |
16:02:39.44 |
-26:09:27.9 |
HIP 78563 |
2.40 |
| 2026-10-09 12:00 |
16:02:59.47 |
-26:10:34.1 |
HIP 78563 |
7.03 |
| 2026-10-10 00:00 |
16:03:19.60 |
-26:11:40.5 |
HIP 78563 |
11.67 |
| 2026-10-10 12:00 |
16:03:39.82 |
-26:12:47.1 |
HIP 78563 |
16.35 |
| 2026-10-11 00:00 |
16:04:00.14 |
-26:13:53.8 |
HIP 78563 |
21.04 |