メタデータ
| 項目 |
値 |
| Designation |
C/2014 OE4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-12-10T21:06:20.229120Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:42:38Z |
| Obs used |
1798 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
7.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-05-12.0000000 |
| e |
0.99972574 |
| q (au) |
6.244383 |
| a (au) |
22768.366062 |
| i (deg) |
81.347248 |
| Ω (om, deg) |
240.394924 |
| ω (w, deg) |
65.755220 |
| M (ma, deg) |
0.000044 |
等級
散乱 + 全体線形
$$
M_a = (8.003 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.003 |
| n |
2.000 |
| gf |
0.897 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.682 |
| 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) |
| 2026-03-26 00:00 |
03:41:41.12 |
+21:01:40.3 |
HIP 17340 |
20.68 |
| 2026-03-26 12:00 |
03:41:45.08 |
+21:01:36.7 |
HIP 17340 |
20.12 |
| 2026-03-27 00:00 |
03:41:49.08 |
+21:01:33.2 |
HIP 17340 |
19.57 |
| 2026-03-27 12:00 |
03:41:53.11 |
+21:01:29.8 |
HIP 17340 |
19.04 |
| 2026-03-28 00:00 |
03:41:57.18 |
+21:01:26.6 |
HIP 17340 |
18.55 |
| 2026-03-28 12:00 |
03:42:01.29 |
+21:01:23.5 |
HIP 17340 |
18.08 |
| 2026-03-29 00:00 |
03:42:05.43 |
+21:01:20.5 |
HIP 17340 |
17.65 |
| 2026-03-29 12:00 |
03:42:09.60 |
+21:01:17.7 |
HIP 17340 |
17.25 |
| 2026-03-30 00:00 |
03:42:13.81 |
+21:01:15.0 |
HIP 17340 |
16.90 |
| 2026-03-30 12:00 |
03:42:18.06 |
+21:01:12.4 |
HIP 17340 |
16.59 |
| 2026-03-31 00:00 |
03:42:22.33 |
+21:01:10.0 |
HIP 17340 |
16.33 |
| 2026-03-31 12:00 |
03:42:26.64 |
+21:01:07.7 |
HIP 17340 |
16.13 |
| 2026-04-01 00:00 |
03:42:30.99 |
+21:01:05.5 |
HIP 17340 |
15.98 |
| 2026-04-01 12:00 |
03:42:35.37 |
+21:01:03.4 |
HIP 17340 |
15.90 |
| 2026-04-02 00:00 |
03:42:39.78 |
+21:01:01.5 |
HIP 17340 |
15.88 |
| 2026-04-02 12:00 |
03:42:44.22 |
+21:00:59.7 |
HIP 17340 |
15.92 |
| 2026-04-03 00:00 |
03:42:48.69 |
+21:00:58.0 |
HIP 17340 |
16.03 |
| 2026-04-03 12:00 |
03:42:53.20 |
+21:00:56.4 |
HIP 17340 |
16.20 |
| 2026-04-04 00:00 |
03:42:57.74 |
+21:00:54.9 |
HIP 17340 |
16.44 |
| 2026-04-04 12:00 |
03:43:02.31 |
+21:00:53.6 |
HIP 17340 |
16.75 |
| 2026-04-05 00:00 |
03:43:06.91 |
+21:00:52.4 |
HIP 17340 |
17.11 |
| 2026-04-05 12:00 |
03:43:11.54 |
+21:00:51.3 |
HIP 17340 |
17.54 |
| 2026-04-06 00:00 |
03:43:16.20 |
+21:00:50.3 |
HIP 17453 |
17.56 |
| 2026-04-06 12:00 |
03:43:20.89 |
+21:00:49.4 |
HIP 17453 |
16.52 |
| 2026-04-07 00:00 |
03:43:25.61 |
+21:00:48.6 |
HIP 17453 |
15.47 |
| 2026-04-07 12:00 |
03:43:30.36 |
+21:00:47.9 |
HIP 17453 |
14.42 |
| 2026-04-08 00:00 |
03:43:35.14 |
+21:00:47.4 |
HIP 17453 |
13.38 |
| 2026-04-08 12:00 |
03:43:39.95 |
+21:00:46.9 |
HIP 17453 |
12.34 |
| 2026-04-09 00:00 |
03:43:44.79 |
+21:00:46.6 |
HIP 17453 |
11.32 |
| 2026-04-09 12:00 |
03:43:49.65 |
+21:00:46.4 |
HIP 17453 |
10.31 |
| 2026-04-10 00:00 |
03:43:54.54 |
+21:00:46.3 |
HIP 17453 |
9.33 |
| 2026-04-10 12:00 |
03:43:59.47 |
+21:00:46.2 |
HIP 17453 |
8.39 |
| 2026-04-11 00:00 |
03:44:04.41 |
+21:00:46.3 |
HIP 17453 |
7.50 |
| 2026-04-11 12:00 |
03:44:09.39 |
+21:00:46.5 |
HIP 17453 |
6.69 |
| 2026-04-12 00:00 |
03:44:14.39 |
+21:00:46.8 |
HIP 17453 |
5.99 |
| 2026-04-12 12:00 |
03:44:19.42 |
+21:00:47.1 |
HIP 17453 |
5.46 |
| 2026-04-13 00:00 |
03:44:24.47 |
+21:00:47.6 |
HIP 17453 |
5.14 |
| 2026-04-13 12:00 |
03:44:29.55 |
+21:00:48.2 |
HIP 17453 |
5.09 |
| 2026-04-14 00:00 |
03:44:34.66 |
+21:00:48.9 |
HIP 17453 |
5.31 |
| 2026-04-14 12:00 |
03:44:39.79 |
+21:00:49.6 |
HIP 17453 |
5.77 |
| 2026-04-15 00:00 |
03:44:44.94 |
+21:00:50.5 |
HIP 17453 |
6.44 |
| 2026-04-15 12:00 |
03:44:50.12 |
+21:00:51.4 |
HIP 17453 |
7.25 |
| 2026-04-16 00:00 |
03:44:55.32 |
+21:00:52.4 |
HIP 17453 |
8.16 |