メタデータ
| 項目 |
値 |
| Designation |
C/2014 H1 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-04-15T07:54:21.663360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:53Z |
| Obs used |
105 |
| NEO |
- |
| M1 |
14.800 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-05-03.0000000 |
| e |
0.98485086 |
| q (au) |
2.138899 |
| a (au) |
141.189497 |
| i (deg) |
99.935932 |
| Ω (om, deg) |
34.701528 |
| ω (w, deg) |
169.184849 |
| M (ma, deg) |
0.010381 |
等級
散乱 + 全体線形
$$
M_a = (18.467 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.467 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.651 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
03:33:19.51 |
-22:02:46.4 |
HIP 16608 |
9.34 |
| 2026-05-12 12:00 |
03:33:23.74 |
-22:02:27.5 |
HIP 16608 |
8.48 |
| 2026-05-13 00:00 |
03:33:27.97 |
-22:02:09.0 |
HIP 16608 |
7.67 |
| 2026-05-13 12:00 |
03:33:32.20 |
-22:01:50.8 |
HIP 16608 |
6.93 |
| 2026-05-14 00:00 |
03:33:36.44 |
-22:01:32.9 |
HIP 16608 |
6.27 |
| 2026-05-14 12:00 |
03:33:40.67 |
-22:01:15.4 |
HIP 16608 |
5.72 |
| 2026-05-15 00:00 |
03:33:44.91 |
-22:00:58.2 |
HIP 16608 |
5.32 |
| 2026-05-15 12:00 |
03:33:49.14 |
-22:00:41.4 |
HIP 16608 |
5.11 |
| 2026-05-16 00:00 |
03:33:53.38 |
-22:00:25.0 |
HIP 16608 |
5.10 |
| 2026-05-16 12:00 |
03:33:57.62 |
-22:00:08.9 |
HIP 16608 |
5.29 |
| 2026-05-17 00:00 |
03:34:01.85 |
-21:59:53.1 |
HIP 16608 |
5.67 |
| 2026-05-17 12:00 |
03:34:06.09 |
-21:59:37.7 |
HIP 16608 |
6.20 |
| 2026-05-18 00:00 |
03:34:10.33 |
-21:59:22.6 |
HIP 16608 |
6.84 |
| 2026-05-18 12:00 |
03:34:14.56 |
-21:59:07.9 |
HIP 16608 |
7.57 |
| 2026-05-19 00:00 |
03:34:18.79 |
-21:58:53.6 |
HIP 16608 |
8.36 |
| 2026-05-19 12:00 |
03:34:23.03 |
-21:58:39.6 |
HIP 16608 |
9.19 |
| 2026-05-20 00:00 |
03:34:27.26 |
-21:58:25.9 |
HIP 16608 |
10.06 |
| 2026-05-20 12:00 |
03:34:31.48 |
-21:58:12.6 |
HIP 16680 |
10.60 |
| 2026-05-21 00:00 |
03:34:35.71 |
-21:57:59.7 |
HIP 16680 |
10.72 |
| 2026-05-21 12:00 |
03:34:39.93 |
-21:57:47.1 |
HIP 16680 |
10.93 |
| 2026-05-22 00:00 |
03:34:44.15 |
-21:57:34.9 |
HIP 16680 |
11.22 |
| 2026-05-22 12:00 |
03:34:48.36 |
-21:57:23.0 |
HIP 16680 |
11.58 |
| 2026-05-23 00:00 |
03:34:52.57 |
-21:57:11.5 |
HIP 16680 |
12.00 |
| 2026-05-23 12:00 |
03:34:56.78 |
-21:57:00.3 |
HIP 16680 |
12.49 |
| 2026-05-24 00:00 |
03:35:00.98 |
-21:56:49.5 |
HIP 16680 |
13.03 |
| 2026-05-24 12:00 |
03:35:05.18 |
-21:56:39.0 |
HIP 16680 |
13.61 |
| 2026-05-25 00:00 |
03:35:09.37 |
-21:56:28.9 |
HIP 16680 |
14.23 |
| 2026-05-25 12:00 |
03:35:13.56 |
-21:56:19.2 |
HIP 16680 |
14.89 |
| 2026-05-26 00:00 |
03:35:17.74 |
-21:56:09.8 |
HIP 16680 |
15.57 |
| 2026-05-26 12:00 |
03:35:21.92 |
-21:56:00.8 |
HIP 16680 |
16.28 |
| 2026-05-27 00:00 |
03:35:26.09 |
-21:55:52.1 |
HIP 16680 |
17.02 |
| 2026-05-27 12:00 |
03:35:30.25 |
-21:55:43.8 |
HIP 16680 |
17.76 |
| 2026-05-28 00:00 |
03:35:34.41 |
-21:55:35.8 |
HIP 16680 |
18.53 |
| 2026-05-28 12:00 |
03:35:38.56 |
-21:55:28.2 |
HIP 16680 |
19.31 |
| 2026-05-29 00:00 |
03:35:42.71 |
-21:55:20.9 |
HIP 16680 |
20.10 |
| 2026-05-29 12:00 |
03:35:46.84 |
-21:55:14.0 |
HIP 16680 |
20.90 |
| 2026-05-30 00:00 |
03:35:50.97 |
-21:55:07.5 |
HIP 16680 |
21.71 |
| 2026-05-30 12:00 |
03:35:55.10 |
-21:55:01.3 |
HIP 16680 |
22.52 |
| 2026-05-31 00:00 |
03:35:59.21 |
-21:54:55.5 |
HIP 16680 |
23.35 |
| 2026-05-31 12:00 |
03:36:03.32 |
-21:54:50.0 |
HIP 16680 |
24.17 |
| 2026-06-01 00:00 |
03:36:07.41 |
-21:54:44.9 |
HIP 16680 |
25.00 |
| 2026-06-01 12:00 |
03:36:11.50 |
-21:54:40.1 |
HIP 16680 |
25.84 |
| 2026-06-02 00:00 |
03:36:15.58 |
-21:54:35.7 |
HIP 16932 |
25.41 |