477P/PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
477P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-09T11:21:47.885760Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:16Z |
| Obs used |
320 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
40.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-08-08T13:03:54.432000Z |
| Discovery magnitude (MPC) |
21.00 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) |
2019-04-04.0000000 |
| e |
0.41596154 |
| q (au) |
1.756419 |
| a (au) |
3.007369 |
| i (deg) |
8.909359 |
| Ω (om, deg) |
59.208728 |
| ω (w, deg) |
305.889989 |
| M (ma, deg) |
33.360615 |
等級
散乱 + 全体線形
$$
M_a = (15.556 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.556 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
12:14:11.18 |
+09:35:32.0 |
HIP 59737 |
26.82 |
| 2026-02-03 12:00 |
12:14:01.37 |
+09:37:30.0 |
HIP 59610 |
26.24 |
| 2026-02-04 00:00 |
12:13:51.32 |
+09:39:29.0 |
HIP 59610 |
23.67 |
| 2026-02-04 12:00 |
12:13:41.02 |
+09:41:29.2 |
HIP 59610 |
21.24 |
| 2026-02-05 00:00 |
12:13:30.48 |
+09:43:30.4 |
HIP 59610 |
19.03 |
| 2026-02-05 12:00 |
12:13:19.69 |
+09:45:32.7 |
HIP 59610 |
17.17 |
| 2026-02-06 00:00 |
12:13:08.66 |
+09:47:36.0 |
HIP 59572 |
14.97 |
| 2026-02-06 12:00 |
12:12:57.39 |
+09:49:40.3 |
HIP 59572 |
12.64 |
| 2026-02-07 00:00 |
12:12:45.89 |
+09:51:45.7 |
HIP 59572 |
10.93 |
| 2026-02-07 12:00 |
12:12:34.14 |
+09:53:52.0 |
HIP 59572 |
10.21 |
| 2026-02-08 00:00 |
12:12:22.15 |
+09:55:59.3 |
HIP 59572 |
10.74 |
| 2026-02-08 12:00 |
12:12:09.93 |
+09:58:07.5 |
HIP 59572 |
12.42 |
| 2026-02-09 00:00 |
12:11:57.48 |
+10:00:16.6 |
HIP 59572 |
14.89 |
| 2026-02-09 12:00 |
12:11:44.79 |
+10:02:26.7 |
HIP 59572 |
17.88 |
| 2026-02-10 00:00 |
12:11:31.86 |
+10:04:37.6 |
HIP 59572 |
21.18 |
| 2026-02-10 12:00 |
12:11:18.71 |
+10:06:49.4 |
HIP 59572 |
24.71 |
| 2026-02-11 00:00 |
12:11:05.33 |
+10:09:02.0 |
HIP 59572 |
28.39 |
| 2026-02-11 12:00 |
12:10:51.72 |
+10:11:15.4 |
HIP 59572 |
32.20 |
| 2026-02-12 00:00 |
12:10:37.88 |
+10:13:29.6 |
HIP 59572 |
36.11 |
| 2026-02-12 12:00 |
12:10:23.82 |
+10:15:44.6 |
HIP 59572 |
40.11 |
| 2026-02-13 00:00 |
12:10:09.54 |
+10:18:00.3 |
HIP 59572 |
44.19 |
| 2026-02-13 12:00 |
12:09:55.03 |
+10:20:16.7 |
HIP 59110 |
40.78 |
| 2026-02-14 00:00 |
12:09:40.31 |
+10:22:33.8 |
HIP 59110 |
36.68 |
| 2026-02-14 12:00 |
12:09:25.37 |
+10:24:51.6 |
HIP 59110 |
32.57 |
| 2026-02-15 00:00 |
12:09:10.22 |
+10:27:10.0 |
HIP 59110 |
28.47 |
| 2026-02-15 12:00 |
12:08:54.85 |
+10:29:29.0 |
HIP 59110 |
24.41 |
| 2026-02-16 00:00 |
12:08:39.28 |
+10:31:48.6 |
HIP 59110 |
20.46 |
| 2026-02-16 12:00 |
12:08:23.49 |
+10:34:08.7 |
HIP 59110 |
16.73 |
| 2026-02-17 00:00 |
12:08:07.50 |
+10:36:29.4 |
HIP 59110 |
13.46 |
| 2026-02-17 12:00 |
12:07:51.31 |
+10:38:50.6 |
HIP 59110 |
11.11 |
| 2026-02-18 00:00 |
12:07:34.92 |
+10:41:12.2 |
HIP 59110 |
10.40 |
| 2026-02-18 12:00 |
12:07:18.33 |
+10:43:34.3 |
HIP 59110 |
11.69 |
| 2026-02-19 00:00 |
12:07:01.55 |
+10:45:56.8 |
HIP 59110 |
14.50 |
| 2026-02-19 12:00 |
12:06:44.57 |
+10:48:19.7 |
HIP 59110 |
18.16 |
| 2026-02-20 00:00 |
12:06:27.41 |
+10:50:42.9 |
HIP 58968 |
16.28 |
| 2026-02-20 12:00 |
12:06:10.06 |
+10:53:06.5 |
HIP 58968 |
11.41 |
| 2026-02-21 00:00 |
12:05:52.52 |
+10:55:30.4 |
HIP 58968 |
6.53 |
| 2026-02-21 12:00 |
12:05:34.80 |
+10:57:54.5 |
HIP 58968 |
1.84 |
| 2026-02-22 00:00 |
12:05:16.91 |
+11:00:18.8 |
HIP 58968 |
3.71 |
| 2026-02-22 12:00 |
12:04:58.85 |
+11:02:43.4 |
HIP 58968 |
8.66 |
| 2026-02-23 00:00 |
12:04:40.61 |
+11:05:08.1 |
HIP 58968 |
13.71 |
| 2026-02-23 12:00 |
12:04:22.20 |
+11:07:33.0 |
HIP 58932 |
15.78 |
| 2026-02-24 00:00 |
12:04:03.63 |
+11:09:58.0 |
HIP 58932 |
17.35 |