メタデータ
| 項目 |
値 |
| Designation |
84P/Giclas |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-06-09T15:39:06.857280Z |
| Orbit solution date (soln_date, UTC) |
2026-05-22T15:03:14Z |
| Obs used |
1049 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
12.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-04-21.0000000 |
| e |
0.50409660 |
| q (au) |
1.791141 |
| a (au) |
3.611876 |
| i (deg) |
7.279605 |
| Ω (om, deg) |
111.345707 |
| ω (w, deg) |
276.834810 |
| M (ma, deg) |
195.503109 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
21:00:54.04 |
-17:56:59.4 |
HIP 103703 |
25.14 |
| 2026-06-01 12:00 |
21:01:06.59 |
-17:57:23.5 |
HIP 103703 |
25.78 |
| 2026-06-02 00:00 |
21:01:18.84 |
-17:57:49.3 |
HIP 103703 |
26.76 |
| 2026-06-02 12:00 |
21:01:30.79 |
-17:58:16.9 |
HIP 103703 |
28.01 |
| 2026-06-03 00:00 |
21:01:42.45 |
-17:58:46.2 |
HIP 103703 |
29.50 |
| 2026-06-03 12:00 |
21:01:53.82 |
-17:59:17.3 |
HIP 103703 |
31.16 |
| 2026-06-04 00:00 |
21:02:04.88 |
-17:59:50.3 |
HIP 103976 |
28.58 |
| 2026-06-04 12:00 |
21:02:15.63 |
-18:00:25.0 |
HIP 103976 |
25.95 |
| 2026-06-05 00:00 |
21:02:26.09 |
-18:01:01.6 |
HIP 103976 |
23.40 |
| 2026-06-05 12:00 |
21:02:36.23 |
-18:01:40.0 |
HIP 103976 |
20.90 |
| 2026-06-06 00:00 |
21:02:46.06 |
-18:02:20.3 |
HIP 103976 |
18.47 |
| 2026-06-06 12:00 |
21:02:55.59 |
-18:03:02.5 |
HIP 103976 |
16.10 |
| 2026-06-07 00:00 |
21:03:04.79 |
-18:03:46.6 |
HIP 103976 |
13.81 |
| 2026-06-07 12:00 |
21:03:13.68 |
-18:04:32.5 |
HIP 103976 |
11.58 |
| 2026-06-08 00:00 |
21:03:22.25 |
-18:05:20.5 |
HIP 103976 |
9.44 |
| 2026-06-08 12:00 |
21:03:30.50 |
-18:06:10.3 |
HIP 103976 |
7.40 |
| 2026-06-09 00:00 |
21:03:38.43 |
-18:07:02.1 |
HIP 103976 |
5.50 |
| 2026-06-09 12:00 |
21:03:46.03 |
-18:07:55.9 |
HIP 103976 |
3.88 |
| 2026-06-10 00:00 |
21:03:53.30 |
-18:08:51.6 |
HIP 103976 |
2.90 |
| 2026-06-10 12:00 |
21:04:00.24 |
-18:09:49.4 |
HIP 103976 |
3.11 |
| 2026-06-11 00:00 |
21:04:06.84 |
-18:10:49.1 |
HIP 103976 |
4.28 |
| 2026-06-11 12:00 |
21:04:13.11 |
-18:11:50.9 |
HIP 103976 |
5.81 |
| 2026-06-12 00:00 |
21:04:19.05 |
-18:12:54.7 |
HIP 103976 |
7.45 |
| 2026-06-12 12:00 |
21:04:24.64 |
-18:14:00.6 |
HIP 103976 |
9.12 |
| 2026-06-13 00:00 |
21:04:29.90 |
-18:15:08.5 |
HIP 103976 |
10.78 |
| 2026-06-13 12:00 |
21:04:34.81 |
-18:16:18.5 |
HIP 103976 |
12.42 |
| 2026-06-14 00:00 |
21:04:39.37 |
-18:17:30.6 |
HIP 103976 |
14.04 |
| 2026-06-14 12:00 |
21:04:43.59 |
-18:18:44.8 |
HIP 103997 |
14.52 |
| 2026-06-15 00:00 |
21:04:47.46 |
-18:20:01.0 |
HIP 103997 |
13.94 |
| 2026-06-15 12:00 |
21:04:50.98 |
-18:21:19.4 |
HIP 103997 |
13.43 |
| 2026-06-16 00:00 |
21:04:54.15 |
-18:22:39.9 |
HIP 103997 |
13.00 |
| 2026-06-16 12:00 |
21:04:56.97 |
-18:24:02.5 |
HIP 103997 |
12.66 |
| 2026-06-17 00:00 |
21:04:59.43 |
-18:25:27.2 |
HIP 103997 |
12.40 |
| 2026-06-17 12:00 |
21:05:01.54 |
-18:26:54.0 |
HIP 103997 |
12.24 |
| 2026-06-18 00:00 |
21:05:03.29 |
-18:28:23.0 |
HIP 103997 |
12.17 |
| 2026-06-18 12:00 |
21:05:04.69 |
-18:29:54.1 |
HIP 103997 |
12.22 |
| 2026-06-19 00:00 |
21:05:05.72 |
-18:31:27.3 |
HIP 103997 |
12.37 |
| 2026-06-19 12:00 |
21:05:06.40 |
-18:33:02.7 |
HIP 103997 |
12.64 |
| 2026-06-20 00:00 |
21:05:06.71 |
-18:34:40.2 |
HIP 103997 |
13.02 |
| 2026-06-20 12:00 |
21:05:06.66 |
-18:36:19.9 |
HIP 103997 |
13.52 |
| 2026-06-21 00:00 |
21:05:06.25 |
-18:38:01.7 |
HIP 103997 |
14.14 |
| 2026-06-21 12:00 |
21:05:05.48 |
-18:39:45.7 |
HIP 103997 |
14.88 |
| 2026-06-22 00:00 |
21:05:04.34 |
-18:41:31.8 |
HIP 103997 |
15.73 |