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
$$
M_a = (8.015 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.015 |
| n |
2.000 |
| gf |
0.897 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.434 |
| 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 |
04:03:35.72 |
+20:42:54.3 |
HIP 19002 |
10.28 |
| 2026-09-20 12:00 |
04:03:33.49 |
+20:42:33.7 |
HIP 19002 |
10.73 |
| 2026-09-21 00:00 |
04:03:31.22 |
+20:42:13.0 |
HIP 19002 |
11.21 |
| 2026-09-21 12:00 |
04:03:28.90 |
+20:41:52.2 |
HIP 19002 |
11.71 |
| 2026-09-22 00:00 |
04:03:26.53 |
+20:41:31.2 |
HIP 19002 |
12.23 |
| 2026-09-22 12:00 |
04:03:24.11 |
+20:41:10.1 |
HIP 19002 |
12.78 |
| 2026-09-23 00:00 |
04:03:21.65 |
+20:40:48.8 |
HIP 19002 |
13.35 |
| 2026-09-23 12:00 |
04:03:19.14 |
+20:40:27.5 |
HIP 19002 |
13.94 |
| 2026-09-24 00:00 |
04:03:16.59 |
+20:40:05.9 |
HIP 19002 |
14.55 |
| 2026-09-24 12:00 |
04:03:13.99 |
+20:39:44.3 |
HIP 19002 |
15.17 |
| 2026-09-25 00:00 |
04:03:11.34 |
+20:39:22.5 |
HIP 19002 |
15.82 |
| 2026-09-25 12:00 |
04:03:08.65 |
+20:39:00.5 |
HIP 19002 |
16.48 |
| 2026-09-26 00:00 |
04:03:05.91 |
+20:38:38.4 |
HIP 19002 |
17.16 |
| 2026-09-26 12:00 |
04:03:03.13 |
+20:38:16.2 |
HIP 19002 |
17.86 |
| 2026-09-27 00:00 |
04:03:00.30 |
+20:37:53.9 |
HIP 19002 |
18.56 |
| 2026-09-27 12:00 |
04:02:57.43 |
+20:37:31.4 |
HIP 19002 |
19.29 |
| 2026-09-28 00:00 |
04:02:54.51 |
+20:37:08.8 |
HIP 18792 |
18.72 |
| 2026-09-28 12:00 |
04:02:51.55 |
+20:36:46.0 |
HIP 18792 |
18.02 |
| 2026-09-29 00:00 |
04:02:48.54 |
+20:36:23.1 |
HIP 18792 |
17.31 |
| 2026-09-29 12:00 |
04:02:45.49 |
+20:36:00.1 |
HIP 18792 |
16.60 |
| 2026-09-30 00:00 |
04:02:42.40 |
+20:35:36.9 |
HIP 18792 |
15.89 |
| 2026-09-30 12:00 |
04:02:39.26 |
+20:35:13.7 |
HIP 18792 |
15.18 |
| 2026-10-01 00:00 |
04:02:36.08 |
+20:34:50.2 |
HIP 18792 |
14.48 |
| 2026-10-01 12:00 |
04:02:32.85 |
+20:34:26.7 |
HIP 18792 |
13.77 |
| 2026-10-02 00:00 |
04:02:29.58 |
+20:34:03.0 |
HIP 18792 |
13.08 |
| 2026-10-02 12:00 |
04:02:26.27 |
+20:33:39.2 |
HIP 18792 |
12.40 |
| 2026-10-03 00:00 |
04:02:22.92 |
+20:33:15.2 |
HIP 18792 |
11.74 |
| 2026-10-03 12:00 |
04:02:19.52 |
+20:32:51.2 |
HIP 18792 |
11.09 |
| 2026-10-04 00:00 |
04:02:16.08 |
+20:32:27.0 |
HIP 18792 |
10.48 |
| 2026-10-04 12:00 |
04:02:12.60 |
+20:32:02.6 |
HIP 18792 |
9.90 |
| 2026-10-05 00:00 |
04:02:09.07 |
+20:31:38.2 |
HIP 18792 |
9.36 |
| 2026-10-05 12:00 |
04:02:05.51 |
+20:31:13.6 |
HIP 18792 |
8.88 |
| 2026-10-06 00:00 |
04:02:01.90 |
+20:30:48.9 |
HIP 18792 |
8.47 |
| 2026-10-06 12:00 |
04:01:58.25 |
+20:30:24.0 |
HIP 18792 |
8.15 |
| 2026-10-07 00:00 |
04:01:54.56 |
+20:29:59.0 |
HIP 18792 |
7.92 |
| 2026-10-07 12:00 |
04:01:50.83 |
+20:29:34.0 |
HIP 18792 |
7.80 |
| 2026-10-08 00:00 |
04:01:47.06 |
+20:29:08.7 |
HIP 18792 |
7.79 |
| 2026-10-08 12:00 |
04:01:43.25 |
+20:28:43.4 |
HIP 18792 |
7.91 |
| 2026-10-09 00:00 |
04:01:39.41 |
+20:28:17.9 |
HIP 18792 |
8.15 |
| 2026-10-09 12:00 |
04:01:35.52 |
+20:27:52.4 |
HIP 18792 |
8.50 |
| 2026-10-10 00:00 |
04:01:31.59 |
+20:27:26.7 |
HIP 18792 |
8.95 |
| 2026-10-10 12:00 |
04:01:27.62 |
+20:27:00.8 |
HIP 18792 |
9.49 |
| 2026-10-11 00:00 |
04:01:23.62 |
+20:26:34.9 |
HIP 18792 |
10.12 |