メタデータ
| 項目 |
値 |
| Designation |
C/1948 V1 (Eclipse comet) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-10-27T10:14:33.031680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
17 |
| 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) |
1949-01-10.0000000 |
| e |
0.99991400 |
| q (au) |
0.135439 |
| a (au) |
1574.787178 |
| i (deg) |
23.116272 |
| Ω (om, deg) |
211.042719 |
| ω (w, deg) |
107.249362 |
| M (ma, deg) |
0.001176 |
等級
散乱 + 全体線形
$$
M_a = (4.919 + 4.296\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.919 |
| n |
4.296 |
| 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) |
| 2026-07-29 00:00 |
08:45:05.45 |
-05:03:01.7 |
HIP 42880 |
11.46 |
| 2026-07-29 12:00 |
08:45:06.56 |
-05:03:05.5 |
HIP 42880 |
11.71 |
| 2026-07-30 00:00 |
08:45:07.66 |
-05:03:09.4 |
HIP 42880 |
11.97 |
| 2026-07-30 12:00 |
08:45:08.77 |
-05:03:13.3 |
HIP 42880 |
12.22 |
| 2026-07-31 00:00 |
08:45:09.88 |
-05:03:17.3 |
HIP 42880 |
12.48 |
| 2026-07-31 12:00 |
08:45:10.98 |
-05:03:21.4 |
HIP 42880 |
12.74 |
| 2026-08-01 00:00 |
08:45:12.09 |
-05:03:25.5 |
HIP 42880 |
13.00 |
| 2026-08-01 12:00 |
08:45:13.19 |
-05:03:29.7 |
HIP 42880 |
13.26 |
| 2026-08-02 00:00 |
08:45:14.30 |
-05:03:33.9 |
HIP 42880 |
13.52 |
| 2026-08-02 12:00 |
08:45:15.41 |
-05:03:38.1 |
HIP 42880 |
13.78 |
| 2026-08-03 00:00 |
08:45:16.51 |
-05:03:42.5 |
HIP 42880 |
14.04 |
| 2026-08-03 12:00 |
08:45:17.62 |
-05:03:46.9 |
HIP 42880 |
14.30 |
| 2026-08-04 00:00 |
08:45:18.73 |
-05:03:51.3 |
HIP 42880 |
14.57 |
| 2026-08-04 12:00 |
08:45:19.83 |
-05:03:55.8 |
HIP 42880 |
14.83 |
| 2026-08-05 00:00 |
08:45:20.94 |
-05:04:00.4 |
HIP 42880 |
15.10 |
| 2026-08-05 12:00 |
08:45:22.04 |
-05:04:05.0 |
HIP 42880 |
15.36 |
| 2026-08-06 00:00 |
08:45:23.14 |
-05:04:09.6 |
HIP 42880 |
15.63 |
| 2026-08-06 12:00 |
08:45:24.25 |
-05:04:14.3 |
HIP 42880 |
15.89 |
| 2026-08-07 00:00 |
08:45:25.35 |
-05:04:19.1 |
HIP 42880 |
16.16 |
| 2026-08-07 12:00 |
08:45:26.45 |
-05:04:23.9 |
HIP 42880 |
16.43 |
| 2026-08-08 00:00 |
08:45:27.55 |
-05:04:28.8 |
HIP 42880 |
16.69 |
| 2026-08-08 12:00 |
08:45:28.65 |
-05:04:33.7 |
HIP 42880 |
16.96 |
| 2026-08-09 00:00 |
08:45:29.75 |
-05:04:38.7 |
HIP 42880 |
17.23 |
| 2026-08-09 12:00 |
08:45:30.85 |
-05:04:43.7 |
HIP 42880 |
17.50 |
| 2026-08-10 00:00 |
08:45:31.94 |
-05:04:48.8 |
HIP 42880 |
17.77 |
| 2026-08-10 12:00 |
08:45:33.04 |
-05:04:54.0 |
HIP 42880 |
18.03 |
| 2026-08-11 00:00 |
08:45:34.13 |
-05:04:59.1 |
HIP 42880 |
18.30 |
| 2026-08-11 12:00 |
08:45:35.23 |
-05:05:04.4 |
HIP 42880 |
18.57 |
| 2026-08-12 00:00 |
08:45:36.32 |
-05:05:09.7 |
HIP 42880 |
18.84 |
| 2026-08-12 12:00 |
08:45:37.41 |
-05:05:15.0 |
HIP 42880 |
19.11 |
| 2026-08-13 00:00 |
08:45:38.49 |
-05:05:20.4 |
HIP 42880 |
19.38 |
| 2026-08-13 12:00 |
08:45:39.58 |
-05:05:25.8 |
HIP 42880 |
19.65 |
| 2026-08-14 00:00 |
08:45:40.66 |
-05:05:31.3 |
HIP 42880 |
19.91 |
| 2026-08-14 12:00 |
08:45:41.74 |
-05:05:36.9 |
HIP 42880 |
20.18 |
| 2026-08-15 00:00 |
08:45:42.82 |
-05:05:42.4 |
HIP 42880 |
20.45 |
| 2026-08-15 12:00 |
08:45:43.90 |
-05:05:48.1 |
HIP 42880 |
20.72 |
| 2026-08-16 00:00 |
08:45:44.98 |
-05:05:53.7 |
HIP 42880 |
20.99 |
| 2026-08-16 12:00 |
08:45:46.05 |
-05:05:59.5 |
HIP 42880 |
21.26 |
| 2026-08-17 00:00 |
08:45:47.12 |
-05:06:05.2 |
HIP 42880 |
21.53 |
| 2026-08-17 12:00 |
08:45:48.19 |
-05:06:11.1 |
HIP 42880 |
21.79 |
| 2026-08-18 00:00 |
08:45:49.25 |
-05:06:16.9 |
HIP 42880 |
22.06 |
| 2026-08-18 12:00 |
08:45:50.32 |
-05:06:22.8 |
HIP 42880 |
22.33 |
| 2026-08-19 00:00 |
08:45:51.38 |
-05:06:28.8 |
HIP 42880 |
22.60 |