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 |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
06:42:02.33 |
+36:44:04.6 |
HIP 32089 |
19.17 |
| 2026-06-01 12:00 |
06:42:03.23 |
+36:44:02.5 |
HIP 32089 |
19.12 |
| 2026-06-02 00:00 |
06:42:04.13 |
+36:44:00.3 |
HIP 32089 |
19.06 |
| 2026-06-02 12:00 |
06:42:05.03 |
+36:43:58.2 |
HIP 32089 |
19.00 |
| 2026-06-03 00:00 |
06:42:05.94 |
+36:43:56.1 |
HIP 32089 |
18.95 |
| 2026-06-03 12:00 |
06:42:06.85 |
+36:43:54.0 |
HIP 32089 |
18.90 |
| 2026-06-04 00:00 |
06:42:07.76 |
+36:43:51.9 |
HIP 32089 |
18.85 |
| 2026-06-04 12:00 |
06:42:08.68 |
+36:43:49.8 |
HIP 32089 |
18.80 |
| 2026-06-05 00:00 |
06:42:09.60 |
+36:43:47.8 |
HIP 32089 |
18.76 |
| 2026-06-05 12:00 |
06:42:10.53 |
+36:43:45.8 |
HIP 32089 |
18.71 |
| 2026-06-06 00:00 |
06:42:11.46 |
+36:43:43.8 |
HIP 32089 |
18.67 |
| 2026-06-06 12:00 |
06:42:12.39 |
+36:43:41.8 |
HIP 32089 |
18.63 |
| 2026-06-07 00:00 |
06:42:13.33 |
+36:43:39.8 |
HIP 32089 |
18.59 |
| 2026-06-07 12:00 |
06:42:14.27 |
+36:43:37.9 |
HIP 32089 |
18.56 |
| 2026-06-08 00:00 |
06:42:15.22 |
+36:43:35.9 |
HIP 32089 |
18.53 |
| 2026-06-08 12:00 |
06:42:16.16 |
+36:43:34.0 |
HIP 32089 |
18.50 |
| 2026-06-09 00:00 |
06:42:17.11 |
+36:43:32.1 |
HIP 32089 |
18.47 |
| 2026-06-09 12:00 |
06:42:18.07 |
+36:43:30.3 |
HIP 32089 |
18.44 |
| 2026-06-10 00:00 |
06:42:19.02 |
+36:43:28.4 |
HIP 32089 |
18.42 |
| 2026-06-10 12:00 |
06:42:19.99 |
+36:43:26.6 |
HIP 32089 |
18.40 |
| 2026-06-11 00:00 |
06:42:20.95 |
+36:43:24.8 |
HIP 32089 |
18.38 |
| 2026-06-11 12:00 |
06:42:21.92 |
+36:43:23.0 |
HIP 32089 |
18.36 |
| 2026-06-12 00:00 |
06:42:22.88 |
+36:43:21.2 |
HIP 32089 |
18.35 |
| 2026-06-12 12:00 |
06:42:23.86 |
+36:43:19.5 |
HIP 32089 |
18.34 |
| 2026-06-13 00:00 |
06:42:24.83 |
+36:43:17.7 |
HIP 32089 |
18.33 |
| 2026-06-13 12:00 |
06:42:25.81 |
+36:43:16.0 |
HIP 32089 |
18.32 |
| 2026-06-14 00:00 |
06:42:26.79 |
+36:43:14.4 |
HIP 32089 |
18.32 |
| 2026-06-14 12:00 |
06:42:27.77 |
+36:43:12.7 |
HIP 32089 |
18.32 |
| 2026-06-15 00:00 |
06:42:28.76 |
+36:43:11.1 |
HIP 32089 |
18.32 |
| 2026-06-15 12:00 |
06:42:29.74 |
+36:43:09.4 |
HIP 32089 |
18.33 |
| 2026-06-16 00:00 |
06:42:30.73 |
+36:43:07.8 |
HIP 32089 |
18.33 |
| 2026-06-16 12:00 |
06:42:31.73 |
+36:43:06.3 |
HIP 32089 |
18.34 |
| 2026-06-17 00:00 |
06:42:32.72 |
+36:43:04.7 |
HIP 32089 |
18.35 |
| 2026-06-17 12:00 |
06:42:33.72 |
+36:43:03.2 |
HIP 32089 |
18.37 |
| 2026-06-18 00:00 |
06:42:34.72 |
+36:43:01.7 |
HIP 32089 |
18.39 |
| 2026-06-18 12:00 |
06:42:35.72 |
+36:43:00.2 |
HIP 32089 |
18.41 |
| 2026-06-19 00:00 |
06:42:36.72 |
+36:42:58.7 |
HIP 32089 |
18.43 |
| 2026-06-19 12:00 |
06:42:37.72 |
+36:42:57.3 |
HIP 32089 |
18.45 |
| 2026-06-20 00:00 |
06:42:38.73 |
+36:42:55.8 |
HIP 32089 |
18.48 |
| 2026-06-20 12:00 |
06:42:39.74 |
+36:42:54.4 |
HIP 32089 |
18.51 |
| 2026-06-21 00:00 |
06:42:40.74 |
+36:42:53.0 |
HIP 32089 |
18.55 |
| 2026-06-21 12:00 |
06:42:41.76 |
+36:42:51.7 |
HIP 32089 |
18.58 |
| 2026-06-22 00:00 |
06:42:42.77 |
+36:42:50.4 |
HIP 32089 |
18.62 |