メタデータ
| 項目 |
値 |
| Designation |
C/1901 G1 (Great comet) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1901-04-24T18:01:03.720000Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:30Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1901-05-18.0000000 |
| e |
0.99993092 |
| q (au) |
0.244794 |
| a (au) |
3543.398137 |
| i (deg) |
131.077661 |
| Ω (om, deg) |
111.037984 |
| ω (w, deg) |
203.045920 |
| M (ma, deg) |
0.000109 |
等級
散乱 + 全体線形
$$
M_a = (5.313 + 3.428\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.313 |
| n |
3.428 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
06:41:01.76 |
+36:50:25.2 |
HIP 32100 |
22.35 |
| 2026-03-26 12:00 |
06:41:01.67 |
+36:50:22.3 |
HIP 32100 |
22.39 |
| 2026-03-27 00:00 |
06:41:01.58 |
+36:50:19.4 |
HIP 32100 |
22.44 |
| 2026-03-27 12:00 |
06:41:01.50 |
+36:50:16.5 |
HIP 32100 |
22.48 |
| 2026-03-28 00:00 |
06:41:01.43 |
+36:50:13.6 |
HIP 32100 |
22.53 |
| 2026-03-28 12:00 |
06:41:01.37 |
+36:50:10.7 |
HIP 32100 |
22.57 |
| 2026-03-29 00:00 |
06:41:01.32 |
+36:50:07.7 |
HIP 32100 |
22.61 |
| 2026-03-29 12:00 |
06:41:01.28 |
+36:50:04.8 |
HIP 32100 |
22.65 |
| 2026-03-30 00:00 |
06:41:01.25 |
+36:50:01.8 |
HIP 32100 |
22.69 |
| 2026-03-30 12:00 |
06:41:01.22 |
+36:49:58.9 |
HIP 32100 |
22.73 |
| 2026-03-31 00:00 |
06:41:01.21 |
+36:49:55.9 |
HIP 32100 |
22.76 |
| 2026-03-31 12:00 |
06:41:01.20 |
+36:49:52.9 |
HIP 31835 |
22.79 |
| 2026-04-01 00:00 |
06:41:01.21 |
+36:49:50.0 |
HIP 31835 |
22.77 |
| 2026-04-01 12:00 |
06:41:01.22 |
+36:49:47.0 |
HIP 31835 |
22.75 |
| 2026-04-02 00:00 |
06:41:01.24 |
+36:49:44.0 |
HIP 31835 |
22.73 |
| 2026-04-02 12:00 |
06:41:01.27 |
+36:49:41.0 |
HIP 31835 |
22.71 |
| 2026-04-03 00:00 |
06:41:01.31 |
+36:49:38.0 |
HIP 31835 |
22.70 |
| 2026-04-03 12:00 |
06:41:01.36 |
+36:49:35.0 |
HIP 31835 |
22.68 |
| 2026-04-04 00:00 |
06:41:01.42 |
+36:49:32.0 |
HIP 31835 |
22.67 |
| 2026-04-04 12:00 |
06:41:01.48 |
+36:49:29.0 |
HIP 31835 |
22.66 |
| 2026-04-05 00:00 |
06:41:01.56 |
+36:49:25.9 |
HIP 31835 |
22.65 |
| 2026-04-05 12:00 |
06:41:01.64 |
+36:49:22.9 |
HIP 31835 |
22.64 |
| 2026-04-06 00:00 |
06:41:01.74 |
+36:49:19.9 |
HIP 31835 |
22.64 |
| 2026-04-06 12:00 |
06:41:01.84 |
+36:49:16.8 |
HIP 31835 |
22.63 |
| 2026-04-07 00:00 |
06:41:01.95 |
+36:49:13.8 |
HIP 31835 |
22.63 |
| 2026-04-07 12:00 |
06:41:02.07 |
+36:49:10.8 |
HIP 31835 |
22.63 |
| 2026-04-08 00:00 |
06:41:02.20 |
+36:49:07.7 |
HIP 31835 |
22.63 |
| 2026-04-08 12:00 |
06:41:02.34 |
+36:49:04.7 |
HIP 31835 |
22.64 |
| 2026-04-09 00:00 |
06:41:02.49 |
+36:49:01.6 |
HIP 31835 |
22.64 |
| 2026-04-09 12:00 |
06:41:02.64 |
+36:48:58.6 |
HIP 31835 |
22.65 |
| 2026-04-10 00:00 |
06:41:02.81 |
+36:48:55.5 |
HIP 31835 |
22.66 |
| 2026-04-10 12:00 |
06:41:02.98 |
+36:48:52.4 |
HIP 31835 |
22.67 |
| 2026-04-11 00:00 |
06:41:03.17 |
+36:48:49.4 |
HIP 31835 |
22.68 |
| 2026-04-11 12:00 |
06:41:03.36 |
+36:48:46.3 |
HIP 31835 |
22.69 |
| 2026-04-12 00:00 |
06:41:03.56 |
+36:48:43.2 |
HIP 31835 |
22.71 |
| 2026-04-12 12:00 |
06:41:03.77 |
+36:48:40.2 |
HIP 31835 |
22.73 |
| 2026-04-13 00:00 |
06:41:03.99 |
+36:48:37.1 |
HIP 31835 |
22.74 |
| 2026-04-13 12:00 |
06:41:04.21 |
+36:48:34.0 |
HIP 31835 |
22.77 |
| 2026-04-14 00:00 |
06:41:04.45 |
+36:48:31.0 |
HIP 31835 |
22.79 |
| 2026-04-14 12:00 |
06:41:04.69 |
+36:48:27.9 |
HIP 31835 |
22.81 |
| 2026-04-15 00:00 |
06:41:04.95 |
+36:48:24.8 |
HIP 31835 |
22.84 |
| 2026-04-15 12:00 |
06:41:05.21 |
+36:48:21.7 |
HIP 31835 |
22.87 |
| 2026-04-16 00:00 |
06:41:05.48 |
+36:48:18.7 |
HIP 31835 |
22.90 |