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) |
| 2026-09-20 00:00 |
20:37:16.52 |
-06:19:54.1 |
HIP 101925 |
31.30 |
| 2026-09-20 12:00 |
20:37:13.74 |
-06:20:23.9 |
HIP 101925 |
32.10 |
| 2026-09-21 00:00 |
20:37:11.00 |
-06:20:53.7 |
HIP 101925 |
32.89 |
| 2026-09-21 12:00 |
20:37:08.29 |
-06:21:23.4 |
HIP 101925 |
33.68 |
| 2026-09-22 00:00 |
20:37:05.62 |
-06:21:53.0 |
HIP 101925 |
34.46 |
| 2026-09-22 12:00 |
20:37:02.98 |
-06:22:22.6 |
HIP 101925 |
35.24 |
| 2026-09-23 00:00 |
20:37:00.37 |
-06:22:52.1 |
HIP 101925 |
36.00 |
| 2026-09-23 12:00 |
20:36:57.81 |
-06:23:21.5 |
HIP 101925 |
36.77 |
| 2026-09-24 00:00 |
20:36:55.27 |
-06:23:50.9 |
HIP 101925 |
37.52 |
| 2026-09-24 12:00 |
20:36:52.77 |
-06:24:20.2 |
HIP 101925 |
38.27 |
| 2026-09-25 00:00 |
20:36:50.31 |
-06:24:49.5 |
HIP 101925 |
39.01 |
| 2026-09-25 12:00 |
20:36:47.89 |
-06:25:18.6 |
HIP 101925 |
39.74 |
| 2026-09-26 00:00 |
20:36:45.50 |
-06:25:47.7 |
HIP 101925 |
40.47 |
| 2026-09-26 12:00 |
20:36:43.14 |
-06:26:16.7 |
HIP 101925 |
41.19 |
| 2026-09-27 00:00 |
20:36:40.83 |
-06:26:45.6 |
HIP 101925 |
41.90 |
| 2026-09-27 12:00 |
20:36:38.54 |
-06:27:14.5 |
HIP 101925 |
42.60 |
| 2026-09-28 00:00 |
20:36:36.30 |
-06:27:43.2 |
HIP 101925 |
43.30 |
| 2026-09-28 12:00 |
20:36:34.09 |
-06:28:11.9 |
HIP 101925 |
43.99 |
| 2026-09-29 00:00 |
20:36:31.92 |
-06:28:40.5 |
HIP 101925 |
44.67 |
| 2026-09-29 12:00 |
20:36:29.79 |
-06:29:09.0 |
HIP 101925 |
45.34 |
| 2026-09-30 00:00 |
20:36:27.69 |
-06:29:37.4 |
HIP 101925 |
46.00 |
| 2026-09-30 12:00 |
20:36:25.63 |
-06:30:05.7 |
HIP 101925 |
46.66 |
| 2026-10-01 00:00 |
20:36:23.61 |
-06:30:34.0 |
HIP 101925 |
47.31 |
| 2026-10-01 12:00 |
20:36:21.63 |
-06:31:02.1 |
HIP 101436 |
47.26 |
| 2026-10-02 00:00 |
20:36:19.69 |
-06:31:30.2 |
HIP 101436 |
46.99 |
| 2026-10-02 12:00 |
20:36:17.78 |
-06:31:58.1 |
HIP 101436 |
46.74 |
| 2026-10-03 00:00 |
20:36:15.91 |
-06:32:26.0 |
HIP 101436 |
46.51 |
| 2026-10-03 12:00 |
20:36:14.08 |
-06:32:53.7 |
HIP 101436 |
46.29 |
| 2026-10-04 00:00 |
20:36:12.29 |
-06:33:21.4 |
HIP 101553 |
45.73 |
| 2026-10-04 12:00 |
20:36:10.54 |
-06:33:48.9 |
HIP 101553 |
45.12 |
| 2026-10-05 00:00 |
20:36:08.82 |
-06:34:16.3 |
HIP 101553 |
44.52 |
| 2026-10-05 12:00 |
20:36:07.15 |
-06:34:43.7 |
HIP 101553 |
43.93 |
| 2026-10-06 00:00 |
20:36:05.51 |
-06:35:10.9 |
HIP 101553 |
43.34 |
| 2026-10-06 12:00 |
20:36:03.92 |
-06:35:38.0 |
HIP 101553 |
42.76 |
| 2026-10-07 00:00 |
20:36:02.36 |
-06:36:05.0 |
HIP 101553 |
42.18 |
| 2026-10-07 12:00 |
20:36:00.85 |
-06:36:31.9 |
HIP 101553 |
41.61 |
| 2026-10-08 00:00 |
20:35:59.37 |
-06:36:58.7 |
HIP 101553 |
41.05 |
| 2026-10-08 12:00 |
20:35:57.93 |
-06:37:25.3 |
HIP 101553 |
40.50 |
| 2026-10-09 00:00 |
20:35:56.54 |
-06:37:51.8 |
HIP 101553 |
39.95 |
| 2026-10-09 12:00 |
20:35:55.18 |
-06:38:18.3 |
HIP 101553 |
39.41 |
| 2026-10-10 00:00 |
20:35:53.86 |
-06:38:44.5 |
HIP 101553 |
38.87 |
| 2026-10-10 12:00 |
20:35:52.59 |
-06:39:10.7 |
HIP 101553 |
38.34 |
| 2026-10-11 00:00 |
20:35:51.35 |
-06:39:36.8 |
HIP 101553 |
37.82 |