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) |
| 2026-03-26 00:00 |
14:03:42.99 |
-59:51:48.9 |
HIP 68902 |
22.24 |
| 2026-03-26 12:00 |
14:03:38.26 |
-59:51:56.7 |
HIP 68902 |
22.84 |
| 2026-03-27 00:00 |
14:03:33.52 |
-59:52:04.3 |
HIP 68902 |
23.44 |
| 2026-03-27 12:00 |
14:03:28.75 |
-59:52:11.6 |
HIP 68902 |
24.04 |
| 2026-03-28 00:00 |
14:03:23.96 |
-59:52:18.6 |
HIP 68902 |
24.64 |
| 2026-03-28 12:00 |
14:03:19.15 |
-59:52:25.2 |
HIP 68704 |
24.97 |
| 2026-03-29 00:00 |
14:03:14.32 |
-59:52:31.6 |
HIP 68704 |
25.19 |
| 2026-03-29 12:00 |
14:03:09.46 |
-59:52:37.7 |
HIP 68704 |
25.41 |
| 2026-03-30 00:00 |
14:03:04.59 |
-59:52:43.5 |
HIP 68422 |
25.28 |
| 2026-03-30 12:00 |
14:02:59.69 |
-59:52:48.9 |
HIP 68422 |
24.85 |
| 2026-03-31 00:00 |
14:02:54.78 |
-59:52:54.1 |
HIP 68422 |
24.42 |
| 2026-03-31 12:00 |
14:02:49.84 |
-59:52:59.0 |
HIP 68422 |
23.99 |
| 2026-04-01 00:00 |
14:02:44.89 |
-59:53:03.6 |
HIP 68422 |
23.57 |
| 2026-04-01 12:00 |
14:02:39.92 |
-59:53:07.8 |
HIP 68422 |
23.16 |
| 2026-04-02 00:00 |
14:02:34.93 |
-59:53:11.8 |
HIP 68422 |
22.75 |
| 2026-04-02 12:00 |
14:02:29.92 |
-59:53:15.5 |
HIP 68422 |
22.34 |
| 2026-04-03 00:00 |
14:02:24.90 |
-59:53:18.8 |
HIP 68422 |
21.94 |
| 2026-04-03 12:00 |
14:02:19.86 |
-59:53:21.9 |
HIP 68422 |
21.55 |
| 2026-04-04 00:00 |
14:02:14.80 |
-59:53:24.7 |
HIP 68422 |
21.16 |
| 2026-04-04 12:00 |
14:02:09.72 |
-59:53:27.1 |
HIP 68422 |
20.78 |
| 2026-04-05 00:00 |
14:02:04.64 |
-59:53:29.3 |
HIP 68422 |
20.41 |
| 2026-04-05 12:00 |
14:01:59.53 |
-59:53:31.1 |
HIP 68422 |
20.04 |
| 2026-04-06 00:00 |
14:01:54.41 |
-59:53:32.7 |
HIP 68422 |
19.69 |
| 2026-04-06 12:00 |
14:01:49.28 |
-59:53:33.9 |
HIP 68422 |
19.34 |
| 2026-04-07 00:00 |
14:01:44.13 |
-59:53:34.9 |
HIP 68422 |
19.01 |
| 2026-04-07 12:00 |
14:01:38.97 |
-59:53:35.5 |
HIP 68422 |
18.69 |
| 2026-04-08 00:00 |
14:01:33.79 |
-59:53:35.8 |
HIP 68422 |
18.38 |
| 2026-04-08 12:00 |
14:01:28.60 |
-59:53:35.9 |
HIP 68422 |
18.08 |
| 2026-04-09 00:00 |
14:01:23.40 |
-59:53:35.6 |
HIP 68422 |
17.79 |
| 2026-04-09 12:00 |
14:01:18.19 |
-59:53:35.0 |
HIP 68422 |
17.52 |
| 2026-04-10 00:00 |
14:01:12.97 |
-59:53:34.1 |
HIP 68422 |
17.27 |
| 2026-04-10 12:00 |
14:01:07.74 |
-59:53:32.9 |
HIP 68422 |
17.03 |
| 2026-04-11 00:00 |
14:01:02.49 |
-59:53:31.4 |
HIP 68422 |
16.81 |
| 2026-04-11 12:00 |
14:00:57.24 |
-59:53:29.6 |
HIP 68422 |
16.61 |
| 2026-04-12 00:00 |
14:00:51.97 |
-59:53:27.5 |
HIP 68422 |
16.42 |
| 2026-04-12 12:00 |
14:00:46.70 |
-59:53:25.1 |
HIP 68422 |
16.26 |
| 2026-04-13 00:00 |
14:00:41.42 |
-59:53:22.4 |
HIP 68422 |
16.12 |
| 2026-04-13 12:00 |
14:00:36.13 |
-59:53:19.4 |
HIP 68422 |
16.00 |
| 2026-04-14 00:00 |
14:00:30.83 |
-59:53:16.1 |
HIP 68422 |
15.90 |
| 2026-04-14 12:00 |
14:00:25.52 |
-59:53:12.5 |
HIP 68422 |
15.82 |
| 2026-04-15 00:00 |
14:00:20.21 |
-59:53:08.6 |
HIP 68422 |
15.77 |
| 2026-04-15 12:00 |
14:00:14.89 |
-59:53:04.3 |
HIP 68422 |
15.74 |
| 2026-04-16 00:00 |
14:00:09.57 |
-59:52:59.8 |
HIP 68422 |
15.73 |