432P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
432P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-08-31T00:49:17.221440Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:23Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
18.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2016-10-25T11:18:06.278400Z |
| Discovery magnitude (MPC) |
20.95 T |
| 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) |
2020-12-28.0000000 |
| e |
0.24254187 |
| q (au) |
2.300216 |
| a (au) |
3.036757 |
| i (deg) |
10.070047 |
| Ω (om, deg) |
239.214363 |
| ω (w, deg) |
105.379770 |
| M (ma, deg) |
314.176883 |
等級
散乱 + 全体線形
$$
M_a = (18.526 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.526 |
| n |
2.000 |
| gf |
0.901 |
| gb |
-0.836 |
| k |
0.992 |
| 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) |
| 2026-02-03 00:00 |
18:08:49.27 |
-20:41:11.4 |
HIP 88796 |
23.55 |
| 2026-02-03 12:00 |
18:09:39.28 |
-20:39:57.2 |
HIP 89129 |
24.72 |
| 2026-02-04 00:00 |
18:10:29.25 |
-20:38:41.7 |
HIP 89129 |
13.50 |
| 2026-02-04 12:00 |
18:11:19.16 |
-20:37:25.1 |
HIP 89129 |
5.47 |
| 2026-02-05 00:00 |
18:12:09.02 |
-20:36:07.1 |
HIP 89177 |
11.07 |
| 2026-02-05 12:00 |
18:12:58.82 |
-20:34:47.9 |
HIP 89177 |
17.24 |
| 2026-02-06 00:00 |
18:13:48.57 |
-20:33:27.5 |
HIP 89439 |
22.23 |
| 2026-02-06 12:00 |
18:14:38.26 |
-20:32:05.8 |
HIP 89440 |
11.99 |
| 2026-02-07 00:00 |
18:15:27.89 |
-20:30:42.8 |
HIP 89440 |
8.22 |
| 2026-02-07 12:00 |
18:16:17.46 |
-20:29:18.6 |
HIP 89567 |
5.37 |
| 2026-02-08 00:00 |
18:17:06.98 |
-20:27:53.2 |
HIP 89567 |
8.81 |
| 2026-02-08 12:00 |
18:17:56.43 |
-20:26:26.5 |
HIP 89567 |
19.98 |
| 2026-02-09 00:00 |
18:18:45.82 |
-20:24:58.5 |
HIP 89893 |
27.76 |
| 2026-02-09 12:00 |
18:19:35.14 |
-20:23:29.3 |
HIP 89893 |
17.08 |
| 2026-02-10 00:00 |
18:20:24.41 |
-20:21:58.9 |
HIP 89893 |
9.21 |
| 2026-02-10 12:00 |
18:21:13.60 |
-20:20:27.3 |
HIP 89893 |
12.19 |
| 2026-02-11 00:00 |
18:22:02.73 |
-20:18:54.4 |
HIP 89893 |
21.96 |
| 2026-02-11 12:00 |
18:22:51.80 |
-20:17:20.2 |
HIP 90113 |
22.85 |
| 2026-02-12 00:00 |
18:23:40.79 |
-20:15:44.8 |
HIP 90113 |
23.97 |
| 2026-02-12 12:00 |
18:24:29.72 |
-20:14:08.2 |
HIP 90289 |
21.95 |
| 2026-02-13 00:00 |
18:25:18.57 |
-20:12:30.4 |
HIP 90289 |
20.00 |
| 2026-02-13 12:00 |
18:26:07.35 |
-20:10:51.3 |
HIP 90289 |
24.21 |
| 2026-02-14 00:00 |
18:26:56.06 |
-20:09:11.0 |
HIP 90289 |
32.24 |
| 2026-02-14 12:00 |
18:27:44.70 |
-20:07:29.5 |
HIP 90684 |
37.98 |
| 2026-02-15 00:00 |
18:28:33.26 |
-20:05:46.8 |
HIP 90684 |
27.17 |
| 2026-02-15 12:00 |
18:29:21.74 |
-20:04:02.8 |
HIP 90684 |
17.30 |
| 2026-02-16 00:00 |
18:30:10.15 |
-20:02:17.7 |
HIP 90684 |
11.20 |
| 2026-02-16 12:00 |
18:30:58.48 |
-20:00:31.3 |
HIP 90684 |
14.69 |
| 2026-02-17 00:00 |
18:31:46.73 |
-19:58:43.7 |
HIP 90684 |
23.86 |
| 2026-02-17 12:00 |
18:32:34.90 |
-19:56:54.9 |
HIP 91051 |
27.76 |
| 2026-02-18 00:00 |
18:33:22.99 |
-19:55:04.9 |
HIP 91051 |
16.70 |
| 2026-02-18 12:00 |
18:34:10.99 |
-19:53:13.8 |
HIP 91051 |
7.01 |
| 2026-02-19 00:00 |
18:34:58.91 |
-19:51:21.4 |
HIP 91051 |
8.99 |
| 2026-02-19 12:00 |
18:35:46.75 |
-19:49:27.8 |
HIP 91051 |
19.30 |
| 2026-02-20 00:00 |
18:36:34.50 |
-19:47:33.0 |
HIP 91344 |
21.57 |
| 2026-02-20 12:00 |
18:37:22.16 |
-19:45:37.1 |
HIP 91344 |
11.85 |
| 2026-02-21 00:00 |
18:38:09.74 |
-19:43:39.9 |
HIP 91344 |
8.62 |
| 2026-02-21 12:00 |
18:38:57.22 |
-19:41:41.6 |
HIP 91344 |
16.31 |
| 2026-02-22 00:00 |
18:39:44.62 |
-19:39:42.2 |
HIP 91527 |
24.66 |
| 2026-02-22 12:00 |
18:40:31.92 |
-19:37:41.5 |
HIP 91527 |
28.06 |
| 2026-02-23 00:00 |
18:41:19.13 |
-19:35:39.7 |
HIP 91781 |
29.30 |
| 2026-02-23 12:00 |
18:42:06.25 |
-19:33:36.7 |
HIP 91781 |
20.18 |
| 2026-02-24 00:00 |
18:42:53.28 |
-19:31:32.6 |
HIP 91781 |
14.50 |