メタデータ
| 項目 |
値 |
| Designation |
122P/de Vico |
| Type |
P |
| Perihelion (tp_cal, UTC) |
1995-10-06T00:00:14.981760Z |
| Orbit solution date (soln_date, UTC) |
2001-07-02T16:09:03Z |
| Obs used |
294 |
| NEO |
Yes |
| M1 |
7.500 |
| 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) |
1996-07-16.0000000 |
| e |
0.96270889 |
| q (au) |
0.659337 |
| a (au) |
17.680817 |
| i (deg) |
85.382753 |
| Ω (om, deg) |
79.624501 |
| ω (w, deg) |
12.996092 |
| M (ma, deg) |
3.765032 |
等級
散乱 + 全体線形
$$
M_a = (8.029 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.029 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
| 1995-09-18 |
1995-10-05 |
+0.7319 |
+0.214 |
| 1995-10-06 |
1995-11-26 |
-3.7764 |
-0.479 |
| 1995-11-26 |
1996-01-26 |
+4.5518 |
-1.150 |
| 1996-01-26 |
1996-06-25 |
+14.1222 |
-4.275 |
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) |
| 2026-05-12 00:00 |
17:19:00.91 |
-34:10:16.3 |
HIP 84613 |
16.17 |
| 2026-05-12 12:00 |
17:18:57.22 |
-34:10:20.0 |
HIP 84613 |
15.45 |
| 2026-05-13 00:00 |
17:18:53.51 |
-34:10:23.6 |
HIP 84613 |
14.74 |
| 2026-05-13 12:00 |
17:18:49.79 |
-34:10:27.1 |
HIP 84613 |
14.03 |
| 2026-05-14 00:00 |
17:18:46.04 |
-34:10:30.6 |
HIP 84613 |
13.32 |
| 2026-05-14 12:00 |
17:18:42.28 |
-34:10:33.9 |
HIP 84613 |
12.62 |
| 2026-05-15 00:00 |
17:18:38.50 |
-34:10:37.1 |
HIP 84613 |
11.92 |
| 2026-05-15 12:00 |
17:18:34.70 |
-34:10:40.3 |
HIP 84613 |
11.23 |
| 2026-05-16 00:00 |
17:18:30.88 |
-34:10:43.3 |
HIP 84613 |
10.54 |
| 2026-05-16 12:00 |
17:18:27.05 |
-34:10:46.2 |
HIP 84613 |
9.87 |
| 2026-05-17 00:00 |
17:18:23.20 |
-34:10:49.0 |
HIP 84613 |
9.22 |
| 2026-05-17 12:00 |
17:18:19.33 |
-34:10:51.8 |
HIP 84613 |
8.59 |
| 2026-05-18 00:00 |
17:18:15.45 |
-34:10:54.4 |
HIP 84613 |
7.98 |
| 2026-05-18 12:00 |
17:18:11.56 |
-34:10:57.0 |
HIP 84613 |
7.41 |
| 2026-05-19 00:00 |
17:18:07.64 |
-34:10:59.4 |
HIP 84613 |
6.88 |
| 2026-05-19 12:00 |
17:18:03.72 |
-34:11:01.7 |
HIP 84613 |
6.41 |
| 2026-05-20 00:00 |
17:17:59.78 |
-34:11:04.0 |
HIP 84613 |
6.01 |
| 2026-05-20 12:00 |
17:17:55.82 |
-34:11:06.1 |
HIP 84613 |
5.69 |
| 2026-05-21 00:00 |
17:17:51.85 |
-34:11:08.1 |
HIP 84613 |
5.48 |
| 2026-05-21 12:00 |
17:17:47.87 |
-34:11:10.1 |
HIP 84613 |
5.39 |
| 2026-05-22 00:00 |
17:17:43.88 |
-34:11:11.9 |
HIP 84613 |
5.42 |
| 2026-05-22 12:00 |
17:17:39.87 |
-34:11:13.6 |
HIP 84613 |
5.57 |
| 2026-05-23 00:00 |
17:17:35.85 |
-34:11:15.2 |
HIP 84613 |
5.83 |
| 2026-05-23 12:00 |
17:17:31.81 |
-34:11:16.8 |
HIP 84613 |
6.20 |
| 2026-05-24 00:00 |
17:17:27.77 |
-34:11:18.2 |
HIP 84613 |
6.65 |
| 2026-05-24 12:00 |
17:17:23.71 |
-34:11:19.5 |
HIP 84613 |
7.18 |
| 2026-05-25 00:00 |
17:17:19.65 |
-34:11:20.8 |
HIP 84613 |
7.75 |
| 2026-05-25 12:00 |
17:17:15.57 |
-34:11:21.9 |
HIP 84613 |
8.38 |
| 2026-05-26 00:00 |
17:17:11.48 |
-34:11:22.9 |
HIP 84613 |
9.04 |
| 2026-05-26 12:00 |
17:17:07.38 |
-34:11:23.8 |
HIP 84613 |
9.73 |
| 2026-05-27 00:00 |
17:17:03.27 |
-34:11:24.7 |
HIP 84613 |
10.44 |
| 2026-05-27 12:00 |
17:16:59.16 |
-34:11:25.4 |
HIP 84613 |
11.18 |
| 2026-05-28 00:00 |
17:16:55.03 |
-34:11:26.0 |
HIP 84613 |
11.93 |
| 2026-05-28 12:00 |
17:16:50.89 |
-34:11:26.5 |
HIP 84613 |
12.69 |
| 2026-05-29 00:00 |
17:16:46.75 |
-34:11:27.0 |
HIP 84613 |
13.47 |
| 2026-05-29 12:00 |
17:16:42.60 |
-34:11:27.3 |
HIP 84613 |
14.25 |
| 2026-05-30 00:00 |
17:16:38.43 |
-34:11:27.5 |
HIP 84613 |
15.05 |
| 2026-05-30 12:00 |
17:16:34.27 |
-34:11:27.6 |
HIP 84429 |
14.84 |
| 2026-05-31 00:00 |
17:16:30.09 |
-34:11:27.6 |
HIP 84429 |
14.20 |
| 2026-05-31 12:00 |
17:16:25.91 |
-34:11:27.6 |
HIP 84429 |
13.58 |
| 2026-06-01 00:00 |
17:16:21.72 |
-34:11:27.4 |
HIP 84429 |
12.99 |
| 2026-06-01 12:00 |
17:16:17.52 |
-34:11:27.1 |
HIP 84429 |
12.43 |
| 2026-06-02 00:00 |
17:16:13.32 |
-34:11:26.7 |
HIP 84429 |
11.91 |