メタデータ
| 項目 |
値 |
| Designation |
C/1913 Y1 (Delavan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1914-10-26T18:27:07.724160Z |
| Orbit solution date (soln_date, UTC) |
2024-04-15T15:43:28Z |
| Obs used |
157 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
4.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1914-03-15.0000000 |
| e |
1.00014579 |
| q (au) |
1.104401 |
| a (au) |
-7575.468577 |
| i (deg) |
68.042932 |
| Ω (om, deg) |
60.397252 |
| ω (w, deg) |
97.469440 |
| M (ma, deg) |
-0.000337 |
等級
散乱 + 全体線形
$$
M_a = (-2.437 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-2.437 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
01:52:47.53 |
-70:01:57.5 |
HIP 8834 |
16.68 |
| 2026-06-01 12:00 |
01:52:49.45 |
-70:02:05.4 |
HIP 8834 |
16.51 |
| 2026-06-02 00:00 |
01:52:51.36 |
-70:02:13.3 |
HIP 8834 |
16.34 |
| 2026-06-02 12:00 |
01:52:53.26 |
-70:02:21.4 |
HIP 8834 |
16.18 |
| 2026-06-03 00:00 |
01:52:55.14 |
-70:02:29.6 |
HIP 8834 |
16.01 |
| 2026-06-03 12:00 |
01:52:57.01 |
-70:02:37.8 |
HIP 8834 |
15.84 |
| 2026-06-04 00:00 |
01:52:58.87 |
-70:02:46.1 |
HIP 8834 |
15.67 |
| 2026-06-04 12:00 |
01:53:00.71 |
-70:02:54.5 |
HIP 8834 |
15.50 |
| 2026-06-05 00:00 |
01:53:02.54 |
-70:03:03.0 |
HIP 8834 |
15.33 |
| 2026-06-05 12:00 |
01:53:04.35 |
-70:03:11.6 |
HIP 8834 |
15.16 |
| 2026-06-06 00:00 |
01:53:06.15 |
-70:03:20.3 |
HIP 8834 |
14.99 |
| 2026-06-06 12:00 |
01:53:07.94 |
-70:03:29.0 |
HIP 8834 |
14.83 |
| 2026-06-07 00:00 |
01:53:09.71 |
-70:03:37.9 |
HIP 8834 |
14.66 |
| 2026-06-07 12:00 |
01:53:11.47 |
-70:03:46.8 |
HIP 8834 |
14.49 |
| 2026-06-08 00:00 |
01:53:13.21 |
-70:03:55.8 |
HIP 8834 |
14.32 |
| 2026-06-08 12:00 |
01:53:14.94 |
-70:04:04.9 |
HIP 8834 |
14.15 |
| 2026-06-09 00:00 |
01:53:16.65 |
-70:04:14.0 |
HIP 8834 |
13.98 |
| 2026-06-09 12:00 |
01:53:18.35 |
-70:04:23.3 |
HIP 8834 |
13.81 |
| 2026-06-10 00:00 |
01:53:20.04 |
-70:04:32.6 |
HIP 8834 |
13.64 |
| 2026-06-10 12:00 |
01:53:21.70 |
-70:04:42.0 |
HIP 8834 |
13.47 |
| 2026-06-11 00:00 |
01:53:23.36 |
-70:04:51.5 |
HIP 8834 |
13.30 |
| 2026-06-11 12:00 |
01:53:24.99 |
-70:05:01.0 |
HIP 8834 |
13.13 |
| 2026-06-12 00:00 |
01:53:26.62 |
-70:05:10.7 |
HIP 8834 |
12.96 |
| 2026-06-12 12:00 |
01:53:28.22 |
-70:05:20.4 |
HIP 8834 |
12.79 |
| 2026-06-13 00:00 |
01:53:29.81 |
-70:05:30.2 |
HIP 8834 |
12.62 |
| 2026-06-13 12:00 |
01:53:31.39 |
-70:05:40.1 |
HIP 8834 |
12.45 |
| 2026-06-14 00:00 |
01:53:32.95 |
-70:05:50.0 |
HIP 8834 |
12.28 |
| 2026-06-14 12:00 |
01:53:34.49 |
-70:06:00.0 |
HIP 8834 |
12.11 |
| 2026-06-15 00:00 |
01:53:36.01 |
-70:06:10.1 |
HIP 8834 |
11.94 |
| 2026-06-15 12:00 |
01:53:37.52 |
-70:06:20.3 |
HIP 8834 |
11.77 |
| 2026-06-16 00:00 |
01:53:39.02 |
-70:06:30.5 |
HIP 8834 |
11.60 |
| 2026-06-16 12:00 |
01:53:40.49 |
-70:06:40.8 |
HIP 8834 |
11.43 |
| 2026-06-17 00:00 |
01:53:41.95 |
-70:06:51.2 |
HIP 8834 |
11.26 |
| 2026-06-17 12:00 |
01:53:43.39 |
-70:07:01.7 |
HIP 8834 |
11.09 |
| 2026-06-18 00:00 |
01:53:44.82 |
-70:07:12.2 |
HIP 8834 |
10.92 |
| 2026-06-18 12:00 |
01:53:46.23 |
-70:07:22.8 |
HIP 8834 |
10.75 |
| 2026-06-19 00:00 |
01:53:47.62 |
-70:07:33.4 |
HIP 8834 |
10.59 |
| 2026-06-19 12:00 |
01:53:48.99 |
-70:07:44.1 |
HIP 8834 |
10.42 |
| 2026-06-20 00:00 |
01:53:50.35 |
-70:07:54.9 |
HIP 8834 |
10.25 |
| 2026-06-20 12:00 |
01:53:51.69 |
-70:08:05.8 |
HIP 8834 |
10.09 |
| 2026-06-21 00:00 |
01:53:53.01 |
-70:08:16.7 |
HIP 8834 |
9.92 |
| 2026-06-21 12:00 |
01:53:54.31 |
-70:08:27.6 |
HIP 8834 |
9.76 |
| 2026-06-22 00:00 |
01:53:55.60 |
-70:08:38.7 |
HIP 8834 |
9.59 |