メタデータ
| 項目 |
値 |
| Designation |
C/2005 N1 (Juels-Holvorcem) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-08-22T00:59:38.316480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:51Z |
| Obs used |
226 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-10-24.0000000 |
| e |
0.99845617 |
| q (au) |
1.125447 |
| a (au) |
728.998472 |
| i (deg) |
51.180194 |
| Ω (om, deg) |
3.240351 |
| ω (w, deg) |
80.045698 |
| M (ma, deg) |
0.003153 |
等級
散乱 + 全体線形
$$
M_a = (11.252 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.252 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.638 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2005-06-30 |
2005-08-21 |
+14.9257 |
-1.611 |
| 2005-08-25 |
2006-04-02 |
+0.5587 |
-0.872 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
13:49:12.40 |
-58:28:04.5 |
HIP 67556 |
10.97 |
| 2026-07-29 12:00 |
13:49:13.12 |
-58:27:36.1 |
HIP 67556 |
10.97 |
| 2026-07-30 00:00 |
13:49:13.89 |
-58:27:07.9 |
HIP 67556 |
10.98 |
| 2026-07-30 12:00 |
13:49:14.69 |
-58:26:39.8 |
HIP 67556 |
11.01 |
| 2026-07-31 00:00 |
13:49:15.54 |
-58:26:11.9 |
HIP 67556 |
11.06 |
| 2026-07-31 12:00 |
13:49:16.43 |
-58:25:44.1 |
HIP 67556 |
11.12 |
| 2026-08-01 00:00 |
13:49:17.36 |
-58:25:16.4 |
HIP 67556 |
11.19 |
| 2026-08-01 12:00 |
13:49:18.34 |
-58:24:48.8 |
HIP 67556 |
11.28 |
| 2026-08-02 00:00 |
13:49:19.35 |
-58:24:21.4 |
HIP 67556 |
11.38 |
| 2026-08-02 12:00 |
13:49:20.41 |
-58:23:54.1 |
HIP 67556 |
11.49 |
| 2026-08-03 00:00 |
13:49:21.50 |
-58:23:27.0 |
HIP 67556 |
11.62 |
| 2026-08-03 12:00 |
13:49:22.64 |
-58:23:00.0 |
HIP 67556 |
11.76 |
| 2026-08-04 00:00 |
13:49:23.82 |
-58:22:33.2 |
HIP 67556 |
11.90 |
| 2026-08-04 12:00 |
13:49:25.04 |
-58:22:06.5 |
HIP 67556 |
12.07 |
| 2026-08-05 00:00 |
13:49:26.30 |
-58:21:39.9 |
HIP 67556 |
12.24 |
| 2026-08-05 12:00 |
13:49:27.60 |
-58:21:13.5 |
HIP 67556 |
12.42 |
| 2026-08-06 00:00 |
13:49:28.94 |
-58:20:47.3 |
HIP 67556 |
12.61 |
| 2026-08-06 12:00 |
13:49:30.32 |
-58:20:21.2 |
HIP 67556 |
12.81 |
| 2026-08-07 00:00 |
13:49:31.75 |
-58:19:55.3 |
HIP 67556 |
13.02 |
| 2026-08-07 12:00 |
13:49:33.21 |
-58:19:29.5 |
HIP 67556 |
13.23 |
| 2026-08-08 00:00 |
13:49:34.71 |
-58:19:03.9 |
HIP 67556 |
13.46 |
| 2026-08-08 12:00 |
13:49:36.25 |
-58:18:38.4 |
HIP 67556 |
13.69 |
| 2026-08-09 00:00 |
13:49:37.84 |
-58:18:13.2 |
HIP 67556 |
13.92 |
| 2026-08-09 12:00 |
13:49:39.46 |
-58:17:48.0 |
HIP 67556 |
14.17 |
| 2026-08-10 00:00 |
13:49:41.12 |
-58:17:23.1 |
HIP 67556 |
14.42 |
| 2026-08-10 12:00 |
13:49:42.83 |
-58:16:58.3 |
HIP 67556 |
14.67 |
| 2026-08-11 00:00 |
13:49:44.57 |
-58:16:33.7 |
HIP 67556 |
14.94 |
| 2026-08-11 12:00 |
13:49:46.35 |
-58:16:09.3 |
HIP 67556 |
15.20 |
| 2026-08-12 00:00 |
13:49:48.17 |
-58:15:45.0 |
HIP 67556 |
15.47 |
| 2026-08-12 12:00 |
13:49:50.03 |
-58:15:20.9 |
HIP 67556 |
15.75 |
| 2026-08-13 00:00 |
13:49:51.93 |
-58:14:57.0 |
HIP 67556 |
16.03 |
| 2026-08-13 12:00 |
13:49:53.86 |
-58:14:33.3 |
HIP 67556 |
16.32 |
| 2026-08-14 00:00 |
13:49:55.84 |
-58:14:09.8 |
HIP 67563 |
16.01 |
| 2026-08-14 12:00 |
13:49:57.85 |
-58:13:46.4 |
HIP 67563 |
15.55 |
| 2026-08-15 00:00 |
13:49:59.91 |
-58:13:23.2 |
HIP 67563 |
15.09 |
| 2026-08-15 12:00 |
13:50:02.00 |
-58:13:00.3 |
HIP 67563 |
14.63 |
| 2026-08-16 00:00 |
13:50:04.13 |
-58:12:37.5 |
HIP 67563 |
14.18 |
| 2026-08-16 12:00 |
13:50:06.29 |
-58:12:14.9 |
HIP 67563 |
13.73 |
| 2026-08-17 00:00 |
13:50:08.49 |
-58:11:52.5 |
HIP 67563 |
13.28 |
| 2026-08-17 12:00 |
13:50:10.74 |
-58:11:30.3 |
HIP 67563 |
12.84 |
| 2026-08-18 00:00 |
13:50:13.01 |
-58:11:08.3 |
HIP 67563 |
12.40 |
| 2026-08-18 12:00 |
13:50:15.33 |
-58:10:46.4 |
HIP 67563 |
11.96 |
| 2026-08-19 00:00 |
13:50:17.68 |
-58:10:24.8 |
HIP 67563 |
11.53 |