メタデータ
| 項目 |
値 |
| Designation |
C/2000 Y1 (Tubbiolo) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-02-02T03:45:55.477440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:08Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2001-05-01.0000000 |
| e |
1.00234998 |
| q (au) |
7.974764 |
| a (au) |
-3393.538738 |
| i (deg) |
137.974246 |
| Ω (om, deg) |
239.394833 |
| ω (w, deg) |
181.732505 |
| M (ma, deg) |
0.000438 |
等級
散乱 + 全体線形
$$
M_a = (9.458 + 2.166\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.458 |
| n |
2.166 |
| gf |
0.980 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.924 |
| 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) |
| 2026-07-29 00:00 |
18:59:40.42 |
-54:20:44.3 |
HIP 93257 |
23.95 |
| 2026-07-29 12:00 |
18:59:35.57 |
-54:20:37.5 |
HIP 93257 |
23.87 |
| 2026-07-30 00:00 |
18:59:30.73 |
-54:20:30.5 |
HIP 93257 |
23.81 |
| 2026-07-30 12:00 |
18:59:25.91 |
-54:20:23.4 |
HIP 93257 |
23.77 |
| 2026-07-31 00:00 |
18:59:21.10 |
-54:20:16.0 |
HIP 93257 |
23.75 |
| 2026-07-31 12:00 |
18:59:16.32 |
-54:20:08.5 |
HIP 93257 |
23.74 |
| 2026-08-01 00:00 |
18:59:11.55 |
-54:20:00.7 |
HIP 93257 |
23.75 |
| 2026-08-01 12:00 |
18:59:06.80 |
-54:19:52.8 |
HIP 93257 |
23.78 |
| 2026-08-02 00:00 |
18:59:02.07 |
-54:19:44.7 |
HIP 93257 |
23.83 |
| 2026-08-02 12:00 |
18:58:57.36 |
-54:19:36.3 |
HIP 93257 |
23.89 |
| 2026-08-03 00:00 |
18:58:52.67 |
-54:19:27.8 |
HIP 93257 |
23.97 |
| 2026-08-03 12:00 |
18:58:48.00 |
-54:19:19.1 |
HIP 93257 |
24.07 |
| 2026-08-04 00:00 |
18:58:43.35 |
-54:19:10.2 |
HIP 92981 |
23.92 |
| 2026-08-04 12:00 |
18:58:38.72 |
-54:19:01.2 |
HIP 92981 |
23.49 |
| 2026-08-05 00:00 |
18:58:34.11 |
-54:18:51.9 |
HIP 92981 |
23.08 |
| 2026-08-05 12:00 |
18:58:29.52 |
-54:18:42.5 |
HIP 92981 |
22.69 |
| 2026-08-06 00:00 |
18:58:24.95 |
-54:18:32.8 |
HIP 92981 |
22.32 |
| 2026-08-06 12:00 |
18:58:20.41 |
-54:18:23.0 |
HIP 92981 |
21.96 |
| 2026-08-07 00:00 |
18:58:15.88 |
-54:18:13.0 |
HIP 92981 |
21.63 |
| 2026-08-07 12:00 |
18:58:11.38 |
-54:18:02.8 |
HIP 92981 |
21.31 |
| 2026-08-08 00:00 |
18:58:06.91 |
-54:17:52.4 |
HIP 92981 |
21.02 |
| 2026-08-08 12:00 |
18:58:02.45 |
-54:17:41.8 |
HIP 92981 |
20.75 |
| 2026-08-09 00:00 |
18:57:58.02 |
-54:17:31.1 |
HIP 92981 |
20.50 |
| 2026-08-09 12:00 |
18:57:53.61 |
-54:17:20.2 |
HIP 92981 |
20.28 |
| 2026-08-10 00:00 |
18:57:49.23 |
-54:17:09.1 |
HIP 92981 |
20.08 |
| 2026-08-10 12:00 |
18:57:44.87 |
-54:16:57.8 |
HIP 92981 |
19.90 |
| 2026-08-11 00:00 |
18:57:40.54 |
-54:16:46.3 |
HIP 92981 |
19.75 |
| 2026-08-11 12:00 |
18:57:36.23 |
-54:16:34.7 |
HIP 92981 |
19.63 |
| 2026-08-12 00:00 |
18:57:31.95 |
-54:16:22.9 |
HIP 92981 |
19.53 |
| 2026-08-12 12:00 |
18:57:27.69 |
-54:16:10.9 |
HIP 92981 |
19.46 |
| 2026-08-13 00:00 |
18:57:23.46 |
-54:15:58.7 |
HIP 92981 |
19.41 |
| 2026-08-13 12:00 |
18:57:19.25 |
-54:15:46.4 |
HIP 92981 |
19.38 |
| 2026-08-14 00:00 |
18:57:15.08 |
-54:15:33.8 |
HIP 92981 |
19.39 |
| 2026-08-14 12:00 |
18:57:10.92 |
-54:15:21.1 |
HIP 92981 |
19.41 |
| 2026-08-15 00:00 |
18:57:06.80 |
-54:15:08.3 |
HIP 92981 |
19.47 |
| 2026-08-15 12:00 |
18:57:02.70 |
-54:14:55.3 |
HIP 92981 |
19.54 |
| 2026-08-16 00:00 |
18:56:58.64 |
-54:14:42.1 |
HIP 92981 |
19.64 |
| 2026-08-16 12:00 |
18:56:54.60 |
-54:14:28.7 |
HIP 92981 |
19.77 |
| 2026-08-17 00:00 |
18:56:50.59 |
-54:14:15.2 |
HIP 92981 |
19.91 |
| 2026-08-17 12:00 |
18:56:46.60 |
-54:14:01.5 |
HIP 92981 |
20.08 |
| 2026-08-18 00:00 |
18:56:42.65 |
-54:13:47.6 |
HIP 92981 |
20.27 |
| 2026-08-18 12:00 |
18:56:38.73 |
-54:13:33.6 |
HIP 92981 |
20.48 |
| 2026-08-19 00:00 |
18:56:34.83 |
-54:13:19.4 |
HIP 92981 |
20.70 |