470P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
470P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-19T19:12:04.207680Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:19Z |
| Obs used |
210 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
11.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-07-30T12:57:55.440000Z |
| Discovery magnitude (MPC) |
20.84 i |
| 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) |
2021-03-20.0000000 |
| e |
0.38862305 |
| q (au) |
2.727781 |
| a (au) |
4.461701 |
| i (deg) |
8.837963 |
| Ω (om, deg) |
246.243776 |
| ω (w, deg) |
152.250537 |
| M (ma, deg) |
254.916863 |
等級
散乱 + 全体線形
$$
M_a = (11.605 + 5.535\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.605 |
| n |
5.535 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
11:04:03.38 |
-05:31:39.5 |
HIP 54121 |
9.90 |
| 2026-02-03 12:00 |
11:03:50.29 |
-05:30:58.4 |
HIP 54121 |
11.54 |
| 2026-02-04 00:00 |
11:03:37.07 |
-05:30:15.9 |
HIP 54121 |
13.82 |
| 2026-02-04 12:00 |
11:03:23.70 |
-05:29:31.9 |
HIP 54121 |
16.50 |
| 2026-02-05 00:00 |
11:03:10.19 |
-05:28:46.4 |
HIP 54121 |
19.44 |
| 2026-02-05 12:00 |
11:02:56.56 |
-05:27:59.4 |
HIP 54121 |
22.55 |
| 2026-02-06 00:00 |
11:02:42.78 |
-05:27:11.0 |
HIP 54121 |
25.78 |
| 2026-02-06 12:00 |
11:02:28.88 |
-05:26:21.2 |
HIP 53862 |
25.05 |
| 2026-02-07 00:00 |
11:02:14.85 |
-05:25:29.8 |
HIP 53862 |
22.95 |
| 2026-02-07 12:00 |
11:02:00.70 |
-05:24:37.1 |
HIP 53862 |
21.25 |
| 2026-02-08 00:00 |
11:01:46.42 |
-05:23:42.9 |
HIP 53862 |
20.07 |
| 2026-02-08 12:00 |
11:01:32.01 |
-05:22:47.2 |
HIP 53862 |
19.54 |
| 2026-02-09 00:00 |
11:01:17.49 |
-05:21:50.2 |
HIP 53862 |
19.72 |
| 2026-02-09 12:00 |
11:01:02.86 |
-05:20:51.7 |
HIP 53862 |
20.62 |
| 2026-02-10 00:00 |
11:00:48.11 |
-05:19:51.9 |
HIP 53862 |
22.15 |
| 2026-02-10 12:00 |
11:00:33.24 |
-05:18:50.6 |
HIP 53862 |
24.23 |
| 2026-02-11 00:00 |
11:00:18.27 |
-05:17:47.9 |
HIP 53862 |
26.73 |
| 2026-02-11 12:00 |
11:00:03.19 |
-05:16:43.9 |
HIP 53862 |
29.56 |
| 2026-02-12 00:00 |
10:59:48.01 |
-05:15:38.5 |
HIP 53862 |
32.65 |
| 2026-02-12 12:00 |
10:59:32.72 |
-05:14:31.8 |
HIP 53672 |
35.24 |
| 2026-02-13 00:00 |
10:59:17.34 |
-05:13:23.6 |
HIP 53672 |
33.25 |
| 2026-02-13 12:00 |
10:59:01.86 |
-05:12:14.2 |
HIP 53672 |
31.63 |
| 2026-02-14 00:00 |
10:58:46.29 |
-05:11:03.4 |
HIP 53582 |
28.39 |
| 2026-02-14 12:00 |
10:58:30.63 |
-05:09:51.4 |
HIP 53582 |
25.26 |
| 2026-02-15 00:00 |
10:58:14.88 |
-05:08:38.0 |
HIP 53582 |
22.42 |
| 2026-02-15 12:00 |
10:57:59.05 |
-05:07:23.3 |
HIP 53582 |
19.99 |
| 2026-02-16 00:00 |
10:57:43.13 |
-05:06:07.4 |
HIP 53582 |
18.17 |
| 2026-02-16 12:00 |
10:57:27.14 |
-05:04:50.2 |
HIP 53582 |
17.16 |
| 2026-02-17 00:00 |
10:57:11.07 |
-05:03:31.8 |
HIP 53582 |
17.14 |
| 2026-02-17 12:00 |
10:56:54.93 |
-05:02:12.1 |
HIP 53582 |
18.12 |
| 2026-02-18 00:00 |
10:56:38.71 |
-05:00:51.2 |
HIP 53582 |
19.96 |
| 2026-02-18 12:00 |
10:56:22.43 |
-04:59:29.1 |
HIP 53582 |
22.48 |
| 2026-02-19 00:00 |
10:56:06.09 |
-04:58:05.8 |
HIP 53582 |
25.48 |
| 2026-02-19 12:00 |
10:55:49.69 |
-04:56:41.3 |
HIP 53582 |
28.82 |
| 2026-02-20 00:00 |
10:55:33.23 |
-04:55:15.7 |
HIP 53582 |
32.40 |
| 2026-02-20 12:00 |
10:55:16.72 |
-04:53:49.0 |
HIP 53582 |
36.16 |
| 2026-02-21 00:00 |
10:55:00.15 |
-04:52:21.1 |
HIP 53271 |
39.31 |
| 2026-02-21 12:00 |
10:54:43.54 |
-04:50:52.1 |
HIP 53271 |
36.08 |
| 2026-02-22 00:00 |
10:54:26.88 |
-04:49:22.1 |
HIP 53271 |
33.10 |
| 2026-02-22 12:00 |
10:54:10.18 |
-04:47:50.9 |
HIP 53271 |
30.44 |
| 2026-02-23 00:00 |
10:53:53.44 |
-04:46:18.8 |
HIP 53271 |
28.22 |
| 2026-02-23 12:00 |
10:53:36.67 |
-04:44:45.5 |
HIP 53271 |
26.54 |
| 2026-02-24 00:00 |
10:53:19.87 |
-04:43:11.3 |
HIP 53271 |
25.53 |