260P/McNaught
メタデータ
| 項目 |
値 |
| Designation |
260P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-09-12T12:08:17.128320Z |
| Orbit solution date (soln_date, UTC) |
2022-08-01T05:07:28Z |
| Obs used |
6700 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
13.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-10-13.0000000 |
| e |
0.59426383 |
| q (au) |
1.491464 |
| a (au) |
3.675946 |
| i (deg) |
15.768614 |
| Ω (om, deg) |
351.863193 |
| ω (w, deg) |
15.578162 |
| M (ma, deg) |
106.352166 |
等級
散乱 + 全体線形
$$
M_a = (12.521 + 5.334\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.521 |
| n |
5.334 |
| gf |
1.000 |
| gb |
-0.692 |
| k |
0.957 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:20:11.94 |
-32:55:29.7 |
HIP 95106 |
11.61 |
| 2026-02-03 12:00 |
19:21:23.08 |
-32:53:14.6 |
HIP 95106 |
11.69 |
| 2026-02-04 00:00 |
19:22:34.27 |
-32:50:57.5 |
HIP 95262 |
5.69 |
| 2026-02-04 12:00 |
19:23:45.53 |
-32:48:38.3 |
HIP 95262 |
12.79 |
| 2026-02-05 00:00 |
19:24:56.84 |
-32:46:17.2 |
HIP 95531 |
13.97 |
| 2026-02-05 12:00 |
19:26:08.22 |
-32:43:54.0 |
HIP 95531 |
5.14 |
| 2026-02-06 00:00 |
19:27:19.65 |
-32:41:28.7 |
HIP 95555 |
15.94 |
| 2026-02-06 12:00 |
19:28:31.15 |
-32:39:01.5 |
HIP 95804 |
9.42 |
| 2026-02-07 00:00 |
19:29:42.70 |
-32:36:32.1 |
HIP 95827 |
6.74 |
| 2026-02-07 12:00 |
19:30:54.30 |
-32:34:00.7 |
HIP 95827 |
18.92 |
| 2026-02-08 00:00 |
19:32:05.97 |
-32:31:27.3 |
HIP 96103 |
14.51 |
| 2026-02-08 12:00 |
19:33:17.68 |
-32:28:51.8 |
HIP 96235 |
11.25 |
| 2026-02-09 00:00 |
19:34:29.46 |
-32:26:14.2 |
HIP 96235 |
4.35 |
| 2026-02-09 12:00 |
19:35:41.28 |
-32:23:34.5 |
HIP 96307 |
16.77 |
| 2026-02-10 00:00 |
19:36:53.16 |
-32:20:52.8 |
HIP 96453 |
20.88 |
| 2026-02-10 12:00 |
19:38:05.10 |
-32:18:08.9 |
HIP 96453 |
29.92 |
| 2026-02-11 00:00 |
19:39:17.08 |
-32:15:23.0 |
HIP 96819 |
19.26 |
| 2026-02-11 12:00 |
19:40:29.11 |
-32:12:34.9 |
HIP 96819 |
3.87 |
| 2026-02-12 00:00 |
19:41:41.20 |
-32:09:44.7 |
HIP 96819 |
11.80 |
| 2026-02-12 12:00 |
19:42:53.34 |
-32:06:52.4 |
HIP 96964 |
8.38 |
| 2026-02-13 00:00 |
19:44:05.52 |
-32:03:58.0 |
HIP 96964 |
21.71 |
| 2026-02-13 12:00 |
19:45:17.75 |
-32:01:01.5 |
HIP 97260 |
11.29 |
| 2026-02-14 00:00 |
19:46:30.03 |
-31:58:02.8 |
HIP 97260 |
7.06 |
| 2026-02-14 12:00 |
19:47:42.36 |
-31:55:01.9 |
HIP 97407 |
13.53 |
| 2026-02-15 00:00 |
19:48:54.73 |
-31:51:59.0 |
HIP 97577 |
16.47 |
| 2026-02-15 12:00 |
19:50:07.14 |
-31:48:53.8 |
HIP 97577 |
12.35 |
| 2026-02-16 00:00 |
19:51:19.61 |
-31:45:46.5 |
HIP 97824 |
22.10 |
| 2026-02-16 12:00 |
19:52:32.11 |
-31:42:37.1 |
HIP 97824 |
16.20 |
| 2026-02-17 00:00 |
19:53:44.66 |
-31:39:25.5 |
HIP 97927 |
21.24 |
| 2026-02-17 12:00 |
19:54:57.24 |
-31:36:11.7 |
HIP 98108 |
16.92 |
| 2026-02-18 00:00 |
19:56:09.87 |
-31:32:55.7 |
HIP 98108 |
4.12 |
| 2026-02-18 12:00 |
19:57:22.54 |
-31:29:37.5 |
HIP 98130 |
13.63 |
| 2026-02-19 00:00 |
19:58:35.25 |
-31:26:17.1 |
HIP 98130 |
26.03 |
| 2026-02-19 12:00 |
19:59:48.00 |
-31:22:54.6 |
HIP 98520 |
14.81 |
| 2026-02-20 00:00 |
20:01:00.78 |
-31:19:29.8 |
HIP 98520 |
1.54 |
| 2026-02-20 12:00 |
20:02:13.60 |
-31:16:02.8 |
HIP 98520 |
17.10 |
| 2026-02-21 00:00 |
20:03:26.46 |
-31:12:33.6 |
HIP 98775 |
17.88 |
| 2026-02-21 12:00 |
20:04:39.36 |
-31:09:02.2 |
HIP 98775 |
24.69 |
| 2026-02-22 00:00 |
20:05:52.29 |
-31:05:28.6 |
HIP 99154 |
28.29 |
| 2026-02-22 12:00 |
20:07:05.25 |
-31:01:52.7 |
HIP 99154 |
13.86 |
| 2026-02-23 00:00 |
20:08:18.25 |
-30:58:14.6 |
HIP 99154 |
9.93 |
| 2026-02-23 12:00 |
20:09:31.28 |
-30:54:34.2 |
HIP 99374 |
17.72 |
| 2026-02-24 00:00 |
20:10:44.35 |
-30:50:51.6 |
HIP 99374 |
20.31 |