メタデータ
| 項目 |
値 |
| Designation |
C/1898 F1 (Perrine) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1898-03-17T15:10:30.002880Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:13Z |
| Obs used |
327 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
10.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1898-05-18.0000000 |
| e |
0.98044913 |
| q (au) |
1.095263 |
| a (au) |
56.021170 |
| i (deg) |
72.529160 |
| Ω (om, deg) |
263.867101 |
| ω (w, deg) |
47.308039 |
| M (ma, deg) |
0.144250 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
06:30:06.56 |
-17:29:01.2 |
HIP 30836 |
21.28 |
| 2026-06-01 12:00 |
06:30:07.64 |
-17:28:57.0 |
HIP 30836 |
21.54 |
| 2026-06-02 00:00 |
06:30:08.72 |
-17:28:52.8 |
HIP 30836 |
21.79 |
| 2026-06-02 12:00 |
06:30:09.81 |
-17:28:48.7 |
HIP 30836 |
22.05 |
| 2026-06-03 00:00 |
06:30:10.90 |
-17:28:44.7 |
HIP 30836 |
22.31 |
| 2026-06-03 12:00 |
06:30:12.00 |
-17:28:40.8 |
HIP 30836 |
22.57 |
| 2026-06-04 00:00 |
06:30:13.10 |
-17:28:37.0 |
HIP 30836 |
22.83 |
| 2026-06-04 12:00 |
06:30:14.20 |
-17:28:33.3 |
HIP 30836 |
23.09 |
| 2026-06-05 00:00 |
06:30:15.31 |
-17:28:29.6 |
HIP 30836 |
23.35 |
| 2026-06-05 12:00 |
06:30:16.43 |
-17:28:26.1 |
HIP 30836 |
23.62 |
| 2026-06-06 00:00 |
06:30:17.54 |
-17:28:22.6 |
HIP 30836 |
23.88 |
| 2026-06-06 12:00 |
06:30:18.66 |
-17:28:19.2 |
HIP 30836 |
24.15 |
| 2026-06-07 00:00 |
06:30:19.79 |
-17:28:15.9 |
HIP 30836 |
24.42 |
| 2026-06-07 12:00 |
06:30:20.92 |
-17:28:12.7 |
HIP 30836 |
24.68 |
| 2026-06-08 00:00 |
06:30:22.05 |
-17:28:09.6 |
HIP 30836 |
24.95 |
| 2026-06-08 12:00 |
06:30:23.18 |
-17:28:06.6 |
HIP 30836 |
25.22 |
| 2026-06-09 00:00 |
06:30:24.32 |
-17:28:03.7 |
HIP 30836 |
25.50 |
| 2026-06-09 12:00 |
06:30:25.46 |
-17:28:00.9 |
HIP 30836 |
25.77 |
| 2026-06-10 00:00 |
06:30:26.61 |
-17:27:58.1 |
HIP 30918 |
25.99 |
| 2026-06-10 12:00 |
06:30:27.75 |
-17:27:55.5 |
HIP 30918 |
26.19 |
| 2026-06-11 00:00 |
06:30:28.91 |
-17:27:52.9 |
HIP 30918 |
26.39 |
| 2026-06-11 12:00 |
06:30:30.06 |
-17:27:50.5 |
HIP 30918 |
26.59 |
| 2026-06-12 00:00 |
06:30:31.22 |
-17:27:48.1 |
HIP 30918 |
26.79 |
| 2026-06-12 12:00 |
06:30:32.38 |
-17:27:45.8 |
HIP 30918 |
26.99 |
| 2026-06-13 00:00 |
06:30:33.54 |
-17:27:43.7 |
HIP 30918 |
27.19 |
| 2026-06-13 12:00 |
06:30:34.71 |
-17:27:41.6 |
HIP 30918 |
27.40 |
| 2026-06-14 00:00 |
06:30:35.87 |
-17:27:39.6 |
HIP 30918 |
27.60 |
| 2026-06-14 12:00 |
06:30:37.04 |
-17:27:37.7 |
HIP 31030 |
27.67 |
| 2026-06-15 00:00 |
06:30:38.22 |
-17:27:35.9 |
HIP 31030 |
27.70 |
| 2026-06-15 12:00 |
06:30:39.39 |
-17:27:34.2 |
HIP 31030 |
27.72 |
| 2026-06-16 00:00 |
06:30:40.57 |
-17:27:32.6 |
HIP 31030 |
27.75 |
| 2026-06-16 12:00 |
06:30:41.75 |
-17:27:31.0 |
HIP 31030 |
27.78 |
| 2026-06-17 00:00 |
06:30:42.93 |
-17:27:29.6 |
HIP 31030 |
27.81 |
| 2026-06-17 12:00 |
06:30:44.12 |
-17:27:28.3 |
HIP 31030 |
27.84 |
| 2026-06-18 00:00 |
06:30:45.30 |
-17:27:27.0 |
HIP 31030 |
27.87 |
| 2026-06-18 12:00 |
06:30:46.49 |
-17:27:25.9 |
HIP 31030 |
27.91 |
| 2026-06-19 00:00 |
06:30:47.68 |
-17:27:24.8 |
HIP 31030 |
27.94 |
| 2026-06-19 12:00 |
06:30:48.87 |
-17:27:23.9 |
HIP 31030 |
27.98 |
| 2026-06-20 00:00 |
06:30:50.06 |
-17:27:23.0 |
HIP 31030 |
28.02 |
| 2026-06-20 12:00 |
06:30:51.25 |
-17:27:22.3 |
HIP 31030 |
28.06 |
| 2026-06-21 00:00 |
06:30:52.45 |
-17:27:21.6 |
HIP 31030 |
28.10 |
| 2026-06-21 12:00 |
06:30:53.65 |
-17:27:21.0 |
HIP 31030 |
28.14 |
| 2026-06-22 00:00 |
06:30:54.84 |
-17:27:20.5 |
HIP 31030 |
28.19 |