C/2013 J3 (McNaught)
メタデータ
| 項目 |
値 |
| Designation |
C/2013 J3 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-02-22T21:02:36.003840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:35Z |
| Obs used |
105 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
14.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-07-03.0000000 |
| e |
0.99795766 |
| q (au) |
3.988692 |
| a (au) |
1952.998658 |
| i (deg) |
118.225398 |
| Ω (om, deg) |
200.757159 |
| ω (w, deg) |
320.958517 |
| M (ma, deg) |
0.001486 |
等級
散乱 + 全体線形
$$
M_a = (5.562 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.562 |
| n |
6.000 |
| 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) |
| 2026-02-03 00:00 |
07:54:13.73 |
+85:29:30.0 |
HIP 38831 |
16.57 |
| 2026-02-03 12:00 |
07:53:15.48 |
+85:29:18.1 |
HIP 38831 |
16.64 |
| 2026-02-04 00:00 |
07:52:17.48 |
+85:29:05.4 |
HIP 38831 |
16.78 |
| 2026-02-04 12:00 |
07:51:19.74 |
+85:28:52.0 |
HIP 38831 |
17.00 |
| 2026-02-05 00:00 |
07:50:22.29 |
+85:28:37.7 |
HIP 38831 |
17.27 |
| 2026-02-05 12:00 |
07:49:25.12 |
+85:28:22.7 |
HIP 38831 |
17.61 |
| 2026-02-06 00:00 |
07:48:28.24 |
+85:28:06.9 |
HIP 38831 |
18.01 |
| 2026-02-06 12:00 |
07:47:31.68 |
+85:27:50.3 |
HIP 38831 |
18.46 |
| 2026-02-07 00:00 |
07:46:35.43 |
+85:27:33.0 |
HIP 38831 |
18.97 |
| 2026-02-07 12:00 |
07:45:39.51 |
+85:27:14.9 |
HIP 38831 |
19.51 |
| 2026-02-08 00:00 |
07:44:43.93 |
+85:26:56.0 |
HIP 38831 |
20.11 |
| 2026-02-08 12:00 |
07:43:48.69 |
+85:26:36.4 |
HIP 38831 |
20.74 |
| 2026-02-09 00:00 |
07:42:53.81 |
+85:26:16.0 |
HIP 38831 |
21.40 |
| 2026-02-09 12:00 |
07:41:59.29 |
+85:25:55.0 |
HIP 38831 |
22.09 |
| 2026-02-10 00:00 |
07:41:05.15 |
+85:25:33.1 |
HIP 38831 |
22.82 |
| 2026-02-10 12:00 |
07:40:11.39 |
+85:25:10.6 |
HIP 38831 |
23.56 |
| 2026-02-11 00:00 |
07:39:18.02 |
+85:24:47.3 |
HIP 38831 |
24.33 |
| 2026-02-11 12:00 |
07:38:25.05 |
+85:24:23.4 |
HIP 36022 |
24.98 |
| 2026-02-12 00:00 |
07:37:32.48 |
+85:23:58.7 |
HIP 36022 |
24.73 |
| 2026-02-12 12:00 |
07:36:40.33 |
+85:23:33.3 |
HIP 36022 |
24.54 |
| 2026-02-13 00:00 |
07:35:48.61 |
+85:23:07.2 |
HIP 36022 |
24.40 |
| 2026-02-13 12:00 |
07:34:57.31 |
+85:22:40.5 |
HIP 36022 |
24.33 |
| 2026-02-14 00:00 |
07:34:06.45 |
+85:22:13.0 |
HIP 36022 |
24.32 |
| 2026-02-14 12:00 |
07:33:16.04 |
+85:21:44.9 |
HIP 36022 |
24.36 |
| 2026-02-15 00:00 |
07:32:26.08 |
+85:21:16.1 |
HIP 36022 |
24.47 |
| 2026-02-15 12:00 |
07:31:36.57 |
+85:20:46.7 |
HIP 36022 |
24.64 |
| 2026-02-16 00:00 |
07:30:47.53 |
+85:20:16.7 |
HIP 36022 |
24.86 |
| 2026-02-16 12:00 |
07:29:58.95 |
+85:19:45.9 |
HIP 36022 |
25.14 |
| 2026-02-17 00:00 |
07:29:10.86 |
+85:19:14.6 |
HIP 36022 |
25.48 |
| 2026-02-17 12:00 |
07:28:23.24 |
+85:18:42.6 |
HIP 36022 |
25.86 |
| 2026-02-18 00:00 |
07:27:36.11 |
+85:18:10.0 |
HIP 36022 |
26.30 |
| 2026-02-18 12:00 |
07:26:49.47 |
+85:17:36.8 |
HIP 34575 |
26.36 |
| 2026-02-19 00:00 |
07:26:03.33 |
+85:17:03.0 |
HIP 34575 |
26.04 |
| 2026-02-19 12:00 |
07:25:17.69 |
+85:16:28.7 |
HIP 34575 |
25.77 |
| 2026-02-20 00:00 |
07:24:32.55 |
+85:15:53.7 |
HIP 34575 |
25.55 |
| 2026-02-20 12:00 |
07:23:47.92 |
+85:15:18.1 |
HIP 34575 |
25.39 |
| 2026-02-21 00:00 |
07:23:03.80 |
+85:14:42.0 |
HIP 34575 |
25.28 |
| 2026-02-21 12:00 |
07:22:20.20 |
+85:14:05.4 |
HIP 34575 |
25.23 |
| 2026-02-22 00:00 |
07:21:37.12 |
+85:13:28.2 |
HIP 34575 |
25.23 |
| 2026-02-22 12:00 |
07:20:54.56 |
+85:12:50.4 |
HIP 34575 |
25.29 |
| 2026-02-23 00:00 |
07:20:12.53 |
+85:12:12.1 |
HIP 34575 |
25.41 |
| 2026-02-23 12:00 |
07:19:31.02 |
+85:11:33.3 |
HIP 34575 |
25.58 |
| 2026-02-24 00:00 |
07:18:50.05 |
+85:10:54.0 |
HIP 34575 |
25.80 |