454P/PANSTARRS
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 |
0.982 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
6.502 |
| 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) |
| 2026-02-03 00:00 |
16:19:41.39 |
-22:29:14.3 |
HIP 80088 |
17.14 |
| 2026-02-03 12:00 |
16:19:56.12 |
-22:30:29.4 |
HIP 80088 |
13.52 |
| 2026-02-04 00:00 |
16:20:10.72 |
-22:31:44.1 |
HIP 80088 |
9.92 |
| 2026-02-04 12:00 |
16:20:25.19 |
-22:32:58.6 |
HIP 80088 |
6.37 |
| 2026-02-05 00:00 |
16:20:39.52 |
-22:34:12.8 |
HIP 80088 |
2.86 |
| 2026-02-05 12:00 |
16:20:53.71 |
-22:35:26.7 |
HIP 80088 |
0.83 |
| 2026-02-06 00:00 |
16:21:07.76 |
-22:36:40.3 |
HIP 80088 |
4.17 |
| 2026-02-06 12:00 |
16:21:21.68 |
-22:37:53.6 |
HIP 80088 |
7.60 |
| 2026-02-07 00:00 |
16:21:35.46 |
-22:39:06.6 |
HIP 80088 |
11.00 |
| 2026-02-07 12:00 |
16:21:49.10 |
-22:40:19.3 |
HIP 80088 |
14.36 |
| 2026-02-08 00:00 |
16:22:02.59 |
-22:41:31.7 |
HIP 80088 |
17.70 |
| 2026-02-08 12:00 |
16:22:15.95 |
-22:42:43.9 |
HIP 80088 |
21.01 |
| 2026-02-09 00:00 |
16:22:29.16 |
-22:43:55.7 |
HIP 80238 |
23.77 |
| 2026-02-09 12:00 |
16:22:42.22 |
-22:45:07.3 |
HIP 80238 |
22.11 |
| 2026-02-10 00:00 |
16:22:55.14 |
-22:46:18.6 |
HIP 80238 |
20.83 |
| 2026-02-10 12:00 |
16:23:07.92 |
-22:47:29.6 |
HIP 80374 |
19.59 |
| 2026-02-11 00:00 |
16:23:20.54 |
-22:48:40.3 |
HIP 80374 |
17.59 |
| 2026-02-11 12:00 |
16:23:33.02 |
-22:49:50.7 |
HIP 80374 |
15.98 |
| 2026-02-12 00:00 |
16:23:45.35 |
-22:51:00.8 |
HIP 80374 |
14.88 |
| 2026-02-12 12:00 |
16:23:57.52 |
-22:52:10.7 |
HIP 80374 |
14.37 |
| 2026-02-13 00:00 |
16:24:09.54 |
-22:53:20.2 |
HIP 80374 |
14.50 |
| 2026-02-13 12:00 |
16:24:21.41 |
-22:54:29.5 |
HIP 80374 |
15.23 |
| 2026-02-14 00:00 |
16:24:33.13 |
-22:55:38.5 |
HIP 80374 |
16.46 |
| 2026-02-14 12:00 |
16:24:44.69 |
-22:56:47.2 |
HIP 80374 |
18.07 |
| 2026-02-15 00:00 |
16:24:56.09 |
-22:57:55.6 |
HIP 80374 |
19.96 |
| 2026-02-15 12:00 |
16:25:07.34 |
-22:59:03.8 |
HIP 80374 |
22.04 |
| 2026-02-16 00:00 |
16:25:18.43 |
-23:00:11.6 |
HIP 80374 |
24.25 |
| 2026-02-16 12:00 |
16:25:29.36 |
-23:01:19.2 |
HIP 80474 |
23.03 |
| 2026-02-17 00:00 |
16:25:40.13 |
-23:02:26.4 |
HIP 80474 |
21.90 |
| 2026-02-17 12:00 |
16:25:50.74 |
-23:03:33.4 |
HIP 80474 |
21.06 |
| 2026-02-18 00:00 |
16:26:01.18 |
-23:04:40.2 |
HIP 80474 |
20.53 |
| 2026-02-18 12:00 |
16:26:11.46 |
-23:05:46.6 |
HIP 80474 |
20.33 |
| 2026-02-19 00:00 |
16:26:21.58 |
-23:06:52.7 |
HIP 80474 |
20.44 |
| 2026-02-19 12:00 |
16:26:31.54 |
-23:07:58.6 |
HIP 80474 |
20.85 |
| 2026-02-20 00:00 |
16:26:41.32 |
-23:09:04.2 |
HIP 80474 |
21.53 |
| 2026-02-20 12:00 |
16:26:50.94 |
-23:10:09.5 |
HIP 80474 |
22.44 |
| 2026-02-21 00:00 |
16:27:00.39 |
-23:11:14.5 |
HIP 80474 |
23.55 |
| 2026-02-21 12:00 |
16:27:09.68 |
-23:12:19.3 |
HIP 80474 |
24.81 |
| 2026-02-22 00:00 |
16:27:18.79 |
-23:13:23.7 |
HIP 80474 |
26.19 |
| 2026-02-22 12:00 |
16:27:27.74 |
-23:14:27.9 |
HIP 80474 |
27.67 |
| 2026-02-23 00:00 |
16:27:36.51 |
-23:15:31.9 |
HIP 80474 |
29.22 |
| 2026-02-23 12:00 |
16:27:45.11 |
-23:16:35.5 |
HIP 80474 |
30.83 |
| 2026-02-24 00:00 |
16:27:53.54 |
-23:17:38.8 |
HIP 80474 |
32.47 |