メタデータ
| 項目 |
値 |
| Designation |
C/2015 Y1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-05-15T04:24:32.302080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:21Z |
| Obs used |
573 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
21.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-02-29.0000000 |
| e |
0.99138537 |
| q (au) |
2.514054 |
| a (au) |
291.835567 |
| i (deg) |
71.219035 |
| Ω (om, deg) |
135.777778 |
| ω (w, deg) |
24.710558 |
| M (ma, deg) |
359.984939 |
等級
散乱 + 全体線形
$$
M_a = (8.720 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.720 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.760 |
| k |
0.996 |
| 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) |
| 2026-06-01 00:00 |
20:51:40.36 |
-05:01:27.2 |
HIP 102894 |
20.15 |
| 2026-06-01 12:00 |
20:51:38.20 |
-05:01:28.9 |
HIP 102894 |
19.78 |
| 2026-06-02 00:00 |
20:51:36.00 |
-05:01:30.9 |
HIP 102894 |
19.43 |
| 2026-06-02 12:00 |
20:51:33.76 |
-05:01:33.0 |
HIP 102894 |
19.07 |
| 2026-06-03 00:00 |
20:51:31.48 |
-05:01:35.4 |
HIP 102894 |
18.72 |
| 2026-06-03 12:00 |
20:51:29.17 |
-05:01:38.0 |
HIP 102894 |
18.39 |
| 2026-06-04 00:00 |
20:51:26.83 |
-05:01:40.8 |
HIP 102894 |
18.06 |
| 2026-06-04 12:00 |
20:51:24.44 |
-05:01:43.9 |
HIP 102894 |
17.74 |
| 2026-06-05 00:00 |
20:51:22.03 |
-05:01:47.1 |
HIP 102894 |
17.43 |
| 2026-06-05 12:00 |
20:51:19.57 |
-05:01:50.6 |
HIP 102894 |
17.14 |
| 2026-06-06 00:00 |
20:51:17.08 |
-05:01:54.3 |
HIP 102894 |
16.86 |
| 2026-06-06 12:00 |
20:51:14.56 |
-05:01:58.2 |
HIP 102894 |
16.61 |
| 2026-06-07 00:00 |
20:51:12.00 |
-05:02:02.3 |
HIP 102894 |
16.37 |
| 2026-06-07 12:00 |
20:51:09.41 |
-05:02:06.6 |
HIP 102894 |
16.15 |
| 2026-06-08 00:00 |
20:51:06.78 |
-05:02:11.2 |
HIP 102894 |
15.96 |
| 2026-06-08 12:00 |
20:51:04.12 |
-05:02:16.0 |
HIP 102894 |
15.79 |
| 2026-06-09 00:00 |
20:51:01.42 |
-05:02:21.0 |
HIP 102894 |
15.65 |
| 2026-06-09 12:00 |
20:50:58.69 |
-05:02:26.2 |
HIP 102894 |
15.54 |
| 2026-06-10 00:00 |
20:50:55.93 |
-05:02:31.7 |
HIP 102894 |
15.46 |
| 2026-06-10 12:00 |
20:50:53.13 |
-05:02:37.4 |
HIP 102894 |
15.41 |
| 2026-06-11 00:00 |
20:50:50.30 |
-05:02:43.3 |
HIP 102829 |
14.73 |
| 2026-06-11 12:00 |
20:50:47.43 |
-05:02:49.4 |
HIP 102829 |
14.04 |
| 2026-06-12 00:00 |
20:50:44.53 |
-05:02:55.7 |
HIP 102829 |
13.34 |
| 2026-06-12 12:00 |
20:50:41.60 |
-05:03:02.3 |
HIP 102829 |
12.64 |
| 2026-06-13 00:00 |
20:50:38.64 |
-05:03:09.1 |
HIP 102829 |
11.94 |
| 2026-06-13 12:00 |
20:50:35.64 |
-05:03:16.1 |
HIP 102829 |
11.23 |
| 2026-06-14 00:00 |
20:50:32.61 |
-05:03:23.3 |
HIP 102829 |
10.51 |
| 2026-06-14 12:00 |
20:50:29.55 |
-05:03:30.8 |
HIP 102829 |
9.80 |
| 2026-06-15 00:00 |
20:50:26.46 |
-05:03:38.4 |
HIP 102829 |
9.09 |
| 2026-06-15 12:00 |
20:50:23.34 |
-05:03:46.3 |
HIP 102829 |
8.38 |
| 2026-06-16 00:00 |
20:50:20.18 |
-05:03:54.4 |
HIP 102829 |
7.68 |
| 2026-06-16 12:00 |
20:50:17.00 |
-05:04:02.8 |
HIP 102829 |
6.99 |
| 2026-06-17 00:00 |
20:50:13.78 |
-05:04:11.4 |
HIP 102829 |
6.32 |
| 2026-06-17 12:00 |
20:50:10.54 |
-05:04:20.1 |
HIP 102829 |
5.68 |
| 2026-06-18 00:00 |
20:50:07.26 |
-05:04:29.2 |
HIP 102829 |
5.09 |
| 2026-06-18 12:00 |
20:50:03.95 |
-05:04:38.4 |
HIP 102829 |
4.56 |
| 2026-06-19 00:00 |
20:50:00.62 |
-05:04:47.8 |
HIP 102829 |
4.14 |
| 2026-06-19 12:00 |
20:49:57.25 |
-05:04:57.5 |
HIP 102829 |
3.85 |
| 2026-06-20 00:00 |
20:49:53.86 |
-05:05:07.4 |
HIP 102829 |
3.73 |
| 2026-06-20 12:00 |
20:49:50.44 |
-05:05:17.5 |
HIP 102829 |
3.81 |
| 2026-06-21 00:00 |
20:49:46.99 |
-05:05:27.8 |
HIP 102829 |
4.08 |
| 2026-06-21 12:00 |
20:49:43.51 |
-05:05:38.4 |
HIP 102829 |
4.50 |
| 2026-06-22 00:00 |
20:49:40.00 |
-05:05:49.2 |
HIP 102829 |
5.06 |