メタデータ
| 項目 |
値 |
| Designation |
C/1917 H1 (Schaumasse) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1917-05-18T16:57:51.399360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:02Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
31.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1917-05-25.0000000 |
| e |
1.00006471 |
| q (au) |
0.764170 |
| a (au) |
-11809.001775 |
| i (deg) |
158.739267 |
| Ω (om, deg) |
10.829618 |
| ω (w, deg) |
119.148065 |
| M (ma, deg) |
0.000005 |
等級
散乱 + 全体線形
$$
M_a = (11.089 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.089 |
| n |
6.000 |
| 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) |
| 2026-03-26 00:00 |
05:16:44.46 |
+03:16:27.4 |
HIP 24588 |
5.64 |
| 2026-03-26 12:00 |
05:16:44.68 |
+03:16:32.2 |
HIP 24588 |
5.74 |
| 2026-03-27 00:00 |
05:16:44.91 |
+03:16:37.1 |
HIP 24588 |
5.83 |
| 2026-03-27 12:00 |
05:16:45.15 |
+03:16:42.0 |
HIP 24588 |
5.93 |
| 2026-03-28 00:00 |
05:16:45.40 |
+03:16:46.8 |
HIP 24588 |
6.04 |
| 2026-03-28 12:00 |
05:16:45.65 |
+03:16:51.7 |
HIP 24588 |
6.14 |
| 2026-03-29 00:00 |
05:16:45.91 |
+03:16:56.5 |
HIP 24588 |
6.24 |
| 2026-03-29 12:00 |
05:16:46.18 |
+03:17:01.4 |
HIP 24588 |
6.35 |
| 2026-03-30 00:00 |
05:16:46.46 |
+03:17:06.2 |
HIP 24588 |
6.45 |
| 2026-03-30 12:00 |
05:16:46.74 |
+03:17:11.1 |
HIP 24588 |
6.56 |
| 2026-03-31 00:00 |
05:16:47.03 |
+03:17:15.9 |
HIP 24588 |
6.67 |
| 2026-03-31 12:00 |
05:16:47.33 |
+03:17:20.7 |
HIP 24588 |
6.78 |
| 2026-04-01 00:00 |
05:16:47.64 |
+03:17:25.5 |
HIP 24588 |
6.89 |
| 2026-04-01 12:00 |
05:16:47.95 |
+03:17:30.4 |
HIP 24588 |
7.00 |
| 2026-04-02 00:00 |
05:16:48.28 |
+03:17:35.2 |
HIP 24588 |
7.11 |
| 2026-04-02 12:00 |
05:16:48.60 |
+03:17:39.9 |
HIP 24588 |
7.23 |
| 2026-04-03 00:00 |
05:16:48.94 |
+03:17:44.7 |
HIP 24588 |
7.34 |
| 2026-04-03 12:00 |
05:16:49.28 |
+03:17:49.5 |
HIP 24588 |
7.46 |
| 2026-04-04 00:00 |
05:16:49.64 |
+03:17:54.3 |
HIP 24588 |
7.58 |
| 2026-04-04 12:00 |
05:16:49.99 |
+03:17:59.0 |
HIP 24588 |
7.70 |
| 2026-04-05 00:00 |
05:16:50.36 |
+03:18:03.8 |
HIP 24588 |
7.82 |
| 2026-04-05 12:00 |
05:16:50.73 |
+03:18:08.5 |
HIP 24588 |
7.94 |
| 2026-04-06 00:00 |
05:16:51.11 |
+03:18:13.2 |
HIP 24588 |
8.06 |
| 2026-04-06 12:00 |
05:16:51.50 |
+03:18:18.0 |
HIP 24588 |
8.18 |
| 2026-04-07 00:00 |
05:16:51.89 |
+03:18:22.7 |
HIP 24588 |
8.31 |
| 2026-04-07 12:00 |
05:16:52.29 |
+03:18:27.4 |
HIP 24588 |
8.43 |
| 2026-04-08 00:00 |
05:16:52.70 |
+03:18:32.1 |
HIP 24588 |
8.56 |
| 2026-04-08 12:00 |
05:16:53.12 |
+03:18:36.7 |
HIP 24588 |
8.69 |
| 2026-04-09 00:00 |
05:16:53.54 |
+03:18:41.4 |
HIP 24588 |
8.82 |
| 2026-04-09 12:00 |
05:16:53.97 |
+03:18:46.0 |
HIP 24588 |
8.95 |
| 2026-04-10 00:00 |
05:16:54.41 |
+03:18:50.7 |
HIP 24588 |
9.08 |
| 2026-04-10 12:00 |
05:16:54.85 |
+03:18:55.3 |
HIP 24588 |
9.21 |
| 2026-04-11 00:00 |
05:16:55.30 |
+03:19:00.0 |
HIP 24588 |
9.35 |
| 2026-04-11 12:00 |
05:16:55.76 |
+03:19:04.5 |
HIP 24588 |
9.48 |
| 2026-04-12 00:00 |
05:16:56.22 |
+03:19:09.1 |
HIP 24588 |
9.62 |
| 2026-04-12 12:00 |
05:16:56.69 |
+03:19:13.6 |
HIP 24588 |
9.75 |
| 2026-04-13 00:00 |
05:16:57.17 |
+03:19:18.2 |
HIP 24588 |
9.89 |
| 2026-04-13 12:00 |
05:16:57.65 |
+03:19:22.7 |
HIP 24588 |
10.03 |
| 2026-04-14 00:00 |
05:16:58.14 |
+03:19:27.2 |
HIP 24588 |
10.17 |
| 2026-04-14 12:00 |
05:16:58.64 |
+03:19:31.8 |
HIP 24588 |
10.31 |
| 2026-04-15 00:00 |
05:16:59.15 |
+03:19:36.2 |
HIP 24588 |
10.45 |
| 2026-04-15 12:00 |
05:16:59.66 |
+03:19:40.7 |
HIP 24588 |
10.60 |
| 2026-04-16 00:00 |
05:17:00.17 |
+03:19:45.2 |
HIP 24588 |
10.74 |