メタデータ
| 項目 |
値 |
| Designation |
C/2014 R3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-08-08T05:34:28.655040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
830 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
8.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-04-03.0000000 |
| e |
0.99948030 |
| q (au) |
7.275646 |
| a (au) |
13999.773040 |
| i (deg) |
90.839681 |
| Ω (om, deg) |
334.108495 |
| ω (w, deg) |
113.426046 |
| M (ma, deg) |
0.000141 |
等級
散乱 + 全体線形
$$
M_a = (4.131 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.131 |
| n |
6.000 |
| gf |
0.987 |
| gb |
-0.825 |
| k |
0.800 |
| δ90 |
9.999 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2014-09-06 |
2016-08-05 |
+27.2341 |
-23.512 |
| 2016-08-10 |
2020-02-27 |
+1.4895 |
-1.473 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
09:07:00.59 |
-27:00:06.3 |
HIP 44887 |
26.92 |
| 2026-05-12 12:00 |
09:07:00.79 |
-26:59:24.4 |
HIP 44887 |
26.52 |
| 2026-05-13 00:00 |
09:07:01.05 |
-26:58:42.8 |
HIP 44887 |
26.13 |
| 2026-05-13 12:00 |
09:07:01.36 |
-26:58:01.4 |
HIP 44887 |
25.74 |
| 2026-05-14 00:00 |
09:07:01.71 |
-26:57:20.3 |
HIP 44887 |
25.36 |
| 2026-05-14 12:00 |
09:07:02.12 |
-26:56:39.4 |
HIP 44887 |
24.98 |
| 2026-05-15 00:00 |
09:07:02.58 |
-26:55:58.8 |
HIP 44887 |
24.61 |
| 2026-05-15 12:00 |
09:07:03.10 |
-26:55:18.4 |
HIP 44887 |
24.24 |
| 2026-05-16 00:00 |
09:07:03.66 |
-26:54:38.3 |
HIP 44887 |
23.88 |
| 2026-05-16 12:00 |
09:07:04.27 |
-26:53:58.5 |
HIP 44887 |
23.52 |
| 2026-05-17 00:00 |
09:07:04.93 |
-26:53:19.0 |
HIP 44887 |
23.17 |
| 2026-05-17 12:00 |
09:07:05.64 |
-26:52:39.7 |
HIP 44887 |
22.82 |
| 2026-05-18 00:00 |
09:07:06.41 |
-26:52:00.8 |
HIP 44887 |
22.48 |
| 2026-05-18 12:00 |
09:07:07.22 |
-26:51:22.1 |
HIP 44887 |
22.14 |
| 2026-05-19 00:00 |
09:07:08.08 |
-26:50:43.7 |
HIP 44887 |
21.81 |
| 2026-05-19 12:00 |
09:07:08.99 |
-26:50:05.6 |
HIP 44887 |
21.49 |
| 2026-05-20 00:00 |
09:07:09.95 |
-26:49:27.8 |
HIP 44887 |
21.17 |
| 2026-05-20 12:00 |
09:07:10.96 |
-26:48:50.3 |
HIP 44887 |
20.85 |
| 2026-05-21 00:00 |
09:07:12.01 |
-26:48:13.1 |
HIP 44887 |
20.54 |
| 2026-05-21 12:00 |
09:07:13.12 |
-26:47:36.3 |
HIP 44887 |
20.24 |
| 2026-05-22 00:00 |
09:07:14.27 |
-26:46:59.7 |
HIP 44887 |
19.95 |
| 2026-05-22 12:00 |
09:07:15.47 |
-26:46:23.4 |
HIP 44887 |
19.66 |
| 2026-05-23 00:00 |
09:07:16.72 |
-26:45:47.5 |
HIP 44887 |
19.39 |
| 2026-05-23 12:00 |
09:07:18.02 |
-26:45:11.9 |
HIP 44887 |
19.11 |
| 2026-05-24 00:00 |
09:07:19.36 |
-26:44:36.6 |
HIP 44887 |
18.85 |
| 2026-05-24 12:00 |
09:07:20.75 |
-26:44:01.6 |
HIP 44887 |
18.60 |
| 2026-05-25 00:00 |
09:07:22.19 |
-26:43:27.0 |
HIP 44887 |
18.35 |
| 2026-05-25 12:00 |
09:07:23.67 |
-26:42:52.7 |
HIP 44887 |
18.12 |
| 2026-05-26 00:00 |
09:07:25.20 |
-26:42:18.7 |
HIP 44887 |
17.89 |
| 2026-05-26 12:00 |
09:07:26.78 |
-26:41:45.0 |
HIP 44887 |
17.68 |
| 2026-05-27 00:00 |
09:07:28.40 |
-26:41:11.7 |
HIP 44887 |
17.47 |
| 2026-05-27 12:00 |
09:07:30.07 |
-26:40:38.8 |
HIP 44887 |
17.28 |
| 2026-05-28 00:00 |
09:07:31.78 |
-26:40:06.2 |
HIP 44887 |
17.10 |
| 2026-05-28 12:00 |
09:07:33.54 |
-26:39:33.9 |
HIP 44887 |
16.93 |
| 2026-05-29 00:00 |
09:07:35.34 |
-26:39:02.0 |
HIP 44887 |
16.78 |
| 2026-05-29 12:00 |
09:07:37.19 |
-26:38:30.4 |
HIP 44887 |
16.64 |
| 2026-05-30 00:00 |
09:07:39.08 |
-26:37:59.2 |
HIP 44887 |
16.51 |
| 2026-05-30 12:00 |
09:07:41.02 |
-26:37:28.3 |
HIP 44887 |
16.40 |
| 2026-05-31 00:00 |
09:07:42.99 |
-26:36:57.8 |
HIP 44887 |
16.30 |
| 2026-05-31 12:00 |
09:07:45.02 |
-26:36:27.6 |
HIP 44887 |
16.22 |
| 2026-06-01 00:00 |
09:07:47.08 |
-26:35:57.8 |
HIP 44887 |
16.16 |
| 2026-06-01 12:00 |
09:07:49.19 |
-26:35:28.4 |
HIP 44887 |
16.11 |
| 2026-06-02 00:00 |
09:07:51.35 |
-26:34:59.4 |
HIP 44887 |
16.08 |