108P/Ciffreo
メタデータ
| 項目 |
値 |
| Designation |
108P/Ciffreo |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-10-11T05:28:33.585600Z |
| Orbit solution date (soln_date, UTC) |
2022-08-16T21:15:23Z |
| Obs used |
2301 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
19.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-05-19.0000000 |
| e |
0.58101345 |
| q (au) |
1.526125 |
| a (au) |
3.642420 |
| i (deg) |
13.980156 |
| Ω (om, deg) |
52.402395 |
| ω (w, deg) |
356.861707 |
| M (ma, deg) |
184.017042 |
等級
散乱 + 全体線形
$$
M_a = (11.226 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.226 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
16:21:36.34 |
-23:03:11.7 |
HIP 80238 |
17.79 |
| 2026-02-03 12:00 |
16:21:51.01 |
-23:04:09.7 |
HIP 80238 |
14.29 |
| 2026-02-04 00:00 |
16:22:05.56 |
-23:05:07.5 |
HIP 80238 |
10.82 |
| 2026-02-04 12:00 |
16:22:19.97 |
-23:06:04.9 |
HIP 80238 |
7.39 |
| 2026-02-05 00:00 |
16:22:34.26 |
-23:07:02.0 |
HIP 80238 |
4.03 |
| 2026-02-05 12:00 |
16:22:48.42 |
-23:07:58.8 |
HIP 80238 |
1.16 |
| 2026-02-06 00:00 |
16:23:02.44 |
-23:08:55.4 |
HIP 80238 |
3.04 |
| 2026-02-06 12:00 |
16:23:16.33 |
-23:09:51.6 |
HIP 80238 |
6.27 |
| 2026-02-07 00:00 |
16:23:30.09 |
-23:10:47.6 |
HIP 80238 |
9.54 |
| 2026-02-07 12:00 |
16:23:43.71 |
-23:11:43.3 |
HIP 80238 |
12.79 |
| 2026-02-08 00:00 |
16:23:57.19 |
-23:12:38.7 |
HIP 80238 |
16.02 |
| 2026-02-08 12:00 |
16:24:10.54 |
-23:13:33.7 |
HIP 80355 |
16.46 |
| 2026-02-09 00:00 |
16:24:23.75 |
-23:14:28.5 |
HIP 80355 |
15.74 |
| 2026-02-09 12:00 |
16:24:36.82 |
-23:15:23.0 |
HIP 80355 |
15.62 |
| 2026-02-10 00:00 |
16:24:49.75 |
-23:16:17.2 |
HIP 80474 |
13.14 |
| 2026-02-10 12:00 |
16:25:02.53 |
-23:17:11.1 |
HIP 80474 |
10.32 |
| 2026-02-11 00:00 |
16:25:15.18 |
-23:18:04.7 |
HIP 80474 |
7.73 |
| 2026-02-11 12:00 |
16:25:27.67 |
-23:18:58.1 |
HIP 80474 |
5.61 |
| 2026-02-12 00:00 |
16:25:40.03 |
-23:19:51.1 |
HIP 80474 |
4.60 |
| 2026-02-12 12:00 |
16:25:52.23 |
-23:20:43.8 |
HIP 80474 |
5.32 |
| 2026-02-13 00:00 |
16:26:04.29 |
-23:21:36.3 |
HIP 80474 |
7.23 |
| 2026-02-13 12:00 |
16:26:16.20 |
-23:22:28.4 |
HIP 80474 |
9.61 |
| 2026-02-14 00:00 |
16:26:27.96 |
-23:23:20.2 |
HIP 80474 |
12.17 |
| 2026-02-14 12:00 |
16:26:39.57 |
-23:24:11.8 |
HIP 80474 |
14.80 |
| 2026-02-15 00:00 |
16:26:51.03 |
-23:25:03.0 |
HIP 80474 |
17.44 |
| 2026-02-15 12:00 |
16:27:02.34 |
-23:25:54.0 |
HIP 80473 |
20.03 |
| 2026-02-16 00:00 |
16:27:13.49 |
-23:26:44.7 |
HIP 80473 |
22.56 |
| 2026-02-16 12:00 |
16:27:24.48 |
-23:27:35.0 |
HIP 80473 |
25.09 |
| 2026-02-17 00:00 |
16:27:35.32 |
-23:28:25.1 |
HIP 80473 |
27.61 |
| 2026-02-17 12:00 |
16:27:46.00 |
-23:29:14.9 |
HIP 80473 |
30.11 |
| 2026-02-18 00:00 |
16:27:56.52 |
-23:30:04.4 |
HIP 80473 |
32.59 |
| 2026-02-18 12:00 |
16:28:06.89 |
-23:30:53.5 |
HIP 80473 |
35.04 |
| 2026-02-19 00:00 |
16:28:17.09 |
-23:31:42.4 |
HIP 80473 |
37.46 |
| 2026-02-19 12:00 |
16:28:27.13 |
-23:32:31.0 |
HIP 80473 |
39.85 |
| 2026-02-20 00:00 |
16:28:37.01 |
-23:33:19.3 |
HIP 80473 |
42.20 |
| 2026-02-20 12:00 |
16:28:46.72 |
-23:34:07.3 |
HIP 80473 |
44.53 |
| 2026-02-21 00:00 |
16:28:56.27 |
-23:34:55.0 |
HIP 80473 |
46.82 |
| 2026-02-21 12:00 |
16:29:05.66 |
-23:35:42.4 |
HIP 80473 |
49.07 |
| 2026-02-22 00:00 |
16:29:14.87 |
-23:36:29.5 |
HIP 80473 |
51.29 |
| 2026-02-22 12:00 |
16:29:23.93 |
-23:37:16.3 |
HIP 80473 |
53.47 |
| 2026-02-23 00:00 |
16:29:32.81 |
-23:38:02.8 |
HIP 80736 |
54.75 |
| 2026-02-23 12:00 |
16:29:41.52 |
-23:38:49.1 |
HIP 80736 |
54.31 |
| 2026-02-24 00:00 |
16:29:50.07 |
-23:39:35.0 |
HIP 80736 |
53.94 |