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 |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
14:09:38.10 |
-16:38:19.6 |
HIP 69073 |
18.82 |
| 2026-05-12 12:00 |
14:09:23.63 |
-16:36:17.9 |
HIP 69073 |
15.06 |
| 2026-05-13 00:00 |
14:09:09.25 |
-16:34:16.3 |
HIP 69073 |
11.49 |
| 2026-05-13 12:00 |
14:08:54.96 |
-16:32:15.0 |
HIP 69073 |
8.33 |
| 2026-05-14 00:00 |
14:08:40.76 |
-16:30:14.0 |
HIP 69073 |
6.22 |
| 2026-05-14 12:00 |
14:08:26.66 |
-16:28:13.2 |
HIP 69073 |
6.26 |
| 2026-05-15 00:00 |
14:08:12.65 |
-16:26:12.8 |
HIP 69073 |
8.39 |
| 2026-05-15 12:00 |
14:07:58.75 |
-16:24:12.6 |
HIP 69073 |
11.49 |
| 2026-05-16 00:00 |
14:07:44.95 |
-16:22:12.7 |
HIP 68970 |
13.11 |
| 2026-05-16 12:00 |
14:07:31.26 |
-16:20:13.2 |
HIP 68970 |
9.73 |
| 2026-05-17 00:00 |
14:07:17.67 |
-16:18:14.1 |
HIP 68970 |
6.87 |
| 2026-05-17 12:00 |
14:07:04.20 |
-16:16:15.3 |
HIP 68970 |
5.36 |
| 2026-05-18 00:00 |
14:06:50.84 |
-16:14:16.9 |
HIP 68970 |
6.22 |
| 2026-05-18 12:00 |
14:06:37.59 |
-16:12:19.0 |
HIP 68900 |
3.20 |
| 2026-05-19 00:00 |
14:06:24.46 |
-16:10:21.4 |
HIP 68900 |
2.40 |
| 2026-05-19 12:00 |
14:06:11.44 |
-16:08:24.4 |
HIP 68900 |
5.35 |
| 2026-05-20 00:00 |
14:05:58.55 |
-16:06:27.7 |
HIP 68900 |
8.84 |
| 2026-05-20 12:00 |
14:05:45.78 |
-16:04:31.6 |
HIP 68900 |
12.40 |
| 2026-05-21 00:00 |
14:05:33.14 |
-16:02:35.9 |
HIP 68900 |
15.96 |
| 2026-05-21 12:00 |
14:05:20.62 |
-16:00:40.7 |
HIP 68900 |
19.51 |
| 2026-05-22 00:00 |
14:05:08.23 |
-15:58:46.1 |
HIP 68808 |
21.44 |
| 2026-05-22 12:00 |
14:04:55.97 |
-15:56:52.0 |
HIP 68808 |
23.69 |
| 2026-05-23 00:00 |
14:04:43.84 |
-15:54:58.4 |
HIP 68808 |
26.21 |
| 2026-05-23 12:00 |
14:04:31.85 |
-15:53:05.4 |
HIP 68729 |
24.63 |
| 2026-05-24 00:00 |
14:04:19.99 |
-15:51:12.9 |
HIP 68729 |
22.25 |
| 2026-05-24 12:00 |
14:04:08.27 |
-15:49:21.1 |
HIP 68729 |
20.19 |
| 2026-05-25 00:00 |
14:03:56.68 |
-15:47:29.9 |
HIP 68729 |
18.52 |
| 2026-05-25 12:00 |
14:03:45.24 |
-15:45:39.2 |
HIP 68729 |
17.34 |
| 2026-05-26 00:00 |
14:03:33.94 |
-15:43:49.2 |
HIP 68729 |
16.75 |
| 2026-05-26 12:00 |
14:03:22.78 |
-15:41:59.9 |
HIP 68606 |
16.24 |
| 2026-05-27 00:00 |
14:03:11.76 |
-15:40:11.1 |
HIP 68606 |
15.96 |
| 2026-05-27 12:00 |
14:03:00.89 |
-15:38:23.1 |
HIP 68606 |
16.33 |
| 2026-05-28 00:00 |
14:02:50.16 |
-15:36:35.7 |
HIP 68606 |
17.27 |
| 2026-05-28 12:00 |
14:02:39.59 |
-15:34:49.0 |
HIP 68606 |
18.69 |
| 2026-05-29 00:00 |
14:02:29.16 |
-15:33:03.0 |
HIP 68606 |
20.48 |
| 2026-05-29 12:00 |
14:02:18.88 |
-15:31:17.8 |
HIP 68606 |
22.52 |
| 2026-05-30 00:00 |
14:02:08.75 |
-15:29:33.2 |
HIP 68606 |
24.75 |
| 2026-05-30 12:00 |
14:01:58.78 |
-15:27:49.4 |
HIP 68606 |
27.10 |
| 2026-05-31 00:00 |
14:01:48.96 |
-15:26:06.3 |
HIP 68606 |
29.53 |
| 2026-05-31 12:00 |
14:01:39.30 |
-15:24:23.9 |
HIP 68606 |
32.02 |
| 2026-06-01 00:00 |
14:01:29.79 |
-15:22:42.4 |
HIP 68425 |
29.58 |
| 2026-06-01 12:00 |
14:01:20.44 |
-15:21:01.6 |
HIP 68425 |
27.02 |
| 2026-06-02 00:00 |
14:01:11.24 |
-15:19:21.6 |
HIP 68425 |
24.54 |