497P/Spacewatch-PANSTARRS
メタデータ
| 項目 |
値 |
| Designation |
497P/Spacewatch-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-12-07T03:44:27.081600Z |
| Orbit solution date (soln_date, UTC) |
2025-04-17T11:12:20Z |
| Obs used |
174 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
32.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-10-05T07:22:55.862400Z |
| Discovery magnitude (MPC) |
21.76 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-05-28.0000000 |
| e |
0.63206766 |
| q (au) |
2.055492 |
| a (au) |
5.586604 |
| i (deg) |
10.531278 |
| Ω (om, deg) |
40.651360 |
| ω (w, deg) |
32.434528 |
| M (ma, deg) |
67.389928 |
等級
散乱 + 全体線形
$$
M_a = (14.595 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.595 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.970 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
12:21:08.67 |
+08:47:35.1 |
HIP 60015 |
39.95 |
| 2026-02-03 12:00 |
12:20:59.64 |
+08:49:04.3 |
HIP 60015 |
38.03 |
| 2026-02-04 00:00 |
12:20:50.34 |
+08:50:34.7 |
HIP 60015 |
36.15 |
| 2026-02-04 12:00 |
12:20:40.77 |
+08:52:06.2 |
HIP 60015 |
34.33 |
| 2026-02-05 00:00 |
12:20:30.92 |
+08:53:38.7 |
HIP 60015 |
32.59 |
| 2026-02-05 12:00 |
12:20:20.81 |
+08:55:12.3 |
HIP 60015 |
30.97 |
| 2026-02-06 00:00 |
12:20:10.43 |
+08:56:47.0 |
HIP 60015 |
29.51 |
| 2026-02-06 12:00 |
12:19:59.78 |
+08:58:22.6 |
HIP 60015 |
28.26 |
| 2026-02-07 00:00 |
12:19:48.87 |
+08:59:59.3 |
HIP 60015 |
27.26 |
| 2026-02-07 12:00 |
12:19:37.70 |
+09:01:36.9 |
HIP 60092 |
26.49 |
| 2026-02-08 00:00 |
12:19:26.26 |
+09:03:15.5 |
HIP 60092 |
24.63 |
| 2026-02-08 12:00 |
12:19:14.57 |
+09:04:55.0 |
HIP 60092 |
23.07 |
| 2026-02-09 00:00 |
12:19:02.62 |
+09:06:35.4 |
HIP 60092 |
21.91 |
| 2026-02-09 12:00 |
12:18:50.41 |
+09:08:16.7 |
HIP 60092 |
21.24 |
| 2026-02-10 00:00 |
12:18:37.95 |
+09:09:58.9 |
HIP 60092 |
21.15 |
| 2026-02-10 12:00 |
12:18:25.24 |
+09:11:41.9 |
HIP 60092 |
21.66 |
| 2026-02-11 00:00 |
12:18:12.28 |
+09:13:25.7 |
HIP 60092 |
22.77 |
| 2026-02-11 12:00 |
12:17:59.07 |
+09:15:10.3 |
HIP 60092 |
24.42 |
| 2026-02-12 00:00 |
12:17:45.62 |
+09:16:55.6 |
HIP 60092 |
26.53 |
| 2026-02-12 12:00 |
12:17:31.92 |
+09:18:41.7 |
HIP 60092 |
29.04 |
| 2026-02-13 00:00 |
12:17:17.99 |
+09:20:28.4 |
HIP 59804 |
28.68 |
| 2026-02-13 12:00 |
12:17:03.82 |
+09:22:15.9 |
HIP 59804 |
27.38 |
| 2026-02-14 00:00 |
12:16:49.41 |
+09:24:03.9 |
HIP 59804 |
26.59 |
| 2026-02-14 12:00 |
12:16:34.78 |
+09:25:52.6 |
HIP 59804 |
26.36 |
| 2026-02-15 00:00 |
12:16:19.91 |
+09:27:41.9 |
HIP 59804 |
26.74 |
| 2026-02-15 12:00 |
12:16:04.82 |
+09:29:31.7 |
HIP 59804 |
27.73 |
| 2026-02-16 00:00 |
12:15:49.51 |
+09:31:22.1 |
HIP 59804 |
29.28 |
| 2026-02-16 12:00 |
12:15:33.97 |
+09:33:13.0 |
HIP 59737 |
27.23 |
| 2026-02-17 00:00 |
12:15:18.22 |
+09:35:04.3 |
HIP 59737 |
24.53 |
| 2026-02-17 12:00 |
12:15:02.26 |
+09:36:56.1 |
HIP 59737 |
22.34 |
| 2026-02-18 00:00 |
12:14:46.08 |
+09:38:48.3 |
HIP 59737 |
20.83 |
| 2026-02-18 12:00 |
12:14:29.70 |
+09:40:40.8 |
HIP 59737 |
20.21 |
| 2026-02-19 00:00 |
12:14:13.11 |
+09:42:33.7 |
HIP 59737 |
20.58 |
| 2026-02-19 12:00 |
12:13:56.33 |
+09:44:26.9 |
HIP 59610 |
19.26 |
| 2026-02-20 00:00 |
12:13:39.35 |
+09:46:20.4 |
HIP 59610 |
16.38 |
| 2026-02-20 12:00 |
12:13:22.17 |
+09:48:14.2 |
HIP 59610 |
14.42 |
| 2026-02-21 00:00 |
12:13:04.81 |
+09:50:08.1 |
HIP 59572 |
12.32 |
| 2026-02-21 12:00 |
12:12:47.26 |
+09:52:02.3 |
HIP 59572 |
10.58 |
| 2026-02-22 00:00 |
12:12:29.53 |
+09:53:56.6 |
HIP 59572 |
10.83 |
| 2026-02-22 12:00 |
12:12:11.62 |
+09:55:51.0 |
HIP 59572 |
12.99 |
| 2026-02-23 00:00 |
12:11:53.54 |
+09:57:45.5 |
HIP 59572 |
16.37 |
| 2026-02-23 12:00 |
12:11:35.29 |
+09:59:40.1 |
HIP 59572 |
20.39 |
| 2026-02-24 00:00 |
12:11:16.87 |
+10:01:34.7 |
HIP 59572 |
24.76 |