メタデータ
| 項目 |
値 |
| Designation |
480P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-04-22T13:13:52.207680Z |
| Orbit solution date (soln_date, UTC) |
2025-03-06T13:42:38Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
8.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-12-09T12:43:08.284800Z |
| Discovery magnitude (MPC) |
21.55 w |
| 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) |
2018-08-10.0000000 |
| e |
0.24183035 |
| q (au) |
3.525821 |
| a (au) |
4.650438 |
| i (deg) |
13.697578 |
| Ω (om, deg) |
230.461069 |
| ω (w, deg) |
212.102521 |
| M (ma, deg) |
191.298088 |
等級
散乱 + 全体線形
$$
M_a = (12.955 + 3.109\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.955 |
| n |
3.109 |
| 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) |
| 2026-07-29 00:00 |
14:02:37.95 |
-13:56:49.0 |
HIP 68629 |
19.58 |
| 2026-07-29 12:00 |
14:02:48.28 |
-13:57:03.0 |
HIP 68629 |
19.53 |
| 2026-07-30 00:00 |
14:02:58.76 |
-13:57:17.8 |
HIP 68629 |
19.83 |
| 2026-07-30 12:00 |
14:03:09.38 |
-13:57:33.5 |
HIP 68629 |
20.46 |
| 2026-07-31 00:00 |
14:03:20.15 |
-13:57:50.1 |
HIP 68629 |
21.41 |
| 2026-07-31 12:00 |
14:03:31.06 |
-13:58:07.5 |
HIP 68629 |
22.66 |
| 2026-08-01 00:00 |
14:03:42.12 |
-13:58:25.8 |
HIP 68629 |
24.17 |
| 2026-08-01 12:00 |
14:03:53.31 |
-13:58:45.0 |
HIP 68629 |
25.90 |
| 2026-08-02 00:00 |
14:04:04.65 |
-13:59:04.9 |
HIP 68629 |
27.83 |
| 2026-08-02 12:00 |
14:04:16.13 |
-13:59:25.8 |
HIP 68629 |
29.92 |
| 2026-08-03 00:00 |
14:04:27.74 |
-13:59:47.4 |
HIP 68629 |
32.16 |
| 2026-08-03 12:00 |
14:04:39.50 |
-14:00:09.9 |
HIP 68943 |
30.96 |
| 2026-08-04 00:00 |
14:04:51.40 |
-14:00:33.2 |
HIP 68943 |
28.05 |
| 2026-08-04 12:00 |
14:05:03.43 |
-14:00:57.3 |
HIP 68943 |
25.11 |
| 2026-08-05 00:00 |
14:05:15.60 |
-14:01:22.2 |
HIP 68943 |
22.13 |
| 2026-08-05 12:00 |
14:05:27.91 |
-14:01:48.0 |
HIP 68943 |
19.12 |
| 2026-08-06 00:00 |
14:05:40.35 |
-14:02:14.5 |
HIP 68943 |
16.07 |
| 2026-08-06 12:00 |
14:05:52.93 |
-14:02:41.9 |
HIP 68943 |
13.00 |
| 2026-08-07 00:00 |
14:06:05.65 |
-14:03:10.0 |
HIP 68943 |
9.89 |
| 2026-08-07 12:00 |
14:06:18.50 |
-14:03:39.0 |
HIP 68943 |
6.77 |
| 2026-08-08 00:00 |
14:06:31.48 |
-14:04:08.7 |
HIP 68943 |
3.65 |
| 2026-08-08 12:00 |
14:06:44.60 |
-14:04:39.2 |
HIP 68943 |
1.07 |
| 2026-08-09 00:00 |
14:06:57.85 |
-14:05:10.5 |
HIP 68943 |
3.15 |
| 2026-08-09 12:00 |
14:07:11.23 |
-14:05:42.5 |
HIP 68943 |
6.34 |
| 2026-08-10 00:00 |
14:07:24.74 |
-14:06:15.3 |
HIP 68943 |
9.63 |
| 2026-08-10 12:00 |
14:07:38.39 |
-14:06:48.9 |
HIP 68943 |
12.97 |
| 2026-08-11 00:00 |
14:07:52.16 |
-14:07:23.2 |
HIP 68943 |
16.35 |
| 2026-08-11 12:00 |
14:08:06.06 |
-14:07:58.2 |
HIP 68943 |
19.77 |
| 2026-08-12 00:00 |
14:08:20.10 |
-14:08:34.0 |
HIP 68943 |
23.21 |
| 2026-08-12 12:00 |
14:08:34.26 |
-14:09:10.6 |
HIP 69222 |
25.91 |
| 2026-08-13 00:00 |
14:08:48.54 |
-14:09:47.8 |
HIP 69222 |
22.39 |
| 2026-08-13 12:00 |
14:09:02.96 |
-14:10:25.8 |
HIP 69222 |
18.84 |
| 2026-08-14 00:00 |
14:09:17.49 |
-14:11:04.5 |
HIP 69222 |
15.26 |
| 2026-08-14 12:00 |
14:09:32.16 |
-14:11:43.9 |
HIP 69222 |
11.65 |
| 2026-08-15 00:00 |
14:09:46.94 |
-14:12:24.0 |
HIP 69222 |
8.01 |
| 2026-08-15 12:00 |
14:10:01.86 |
-14:13:04.8 |
HIP 69222 |
4.35 |
| 2026-08-16 00:00 |
14:10:16.89 |
-14:13:46.3 |
HIP 69222 |
0.88 |
| 2026-08-16 12:00 |
14:10:32.04 |
-14:14:28.4 |
HIP 69222 |
3.21 |
| 2026-08-17 00:00 |
14:10:47.32 |
-14:15:11.3 |
HIP 69222 |
6.94 |
| 2026-08-17 12:00 |
14:11:02.71 |
-14:15:54.8 |
HIP 69222 |
10.73 |
| 2026-08-18 00:00 |
14:11:18.23 |
-14:16:39.0 |
HIP 69222 |
14.56 |
| 2026-08-18 12:00 |
14:11:33.86 |
-14:17:23.8 |
HIP 69222 |
18.42 |
| 2026-08-19 00:00 |
14:11:49.61 |
-14:18:09.3 |
HIP 69222 |
22.30 |