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 |
-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 |
08:43:21.96 |
-05:17:34.7 |
HIP 42880 |
18.85 |
| 2026-03-26 12:00 |
08:43:21.32 |
-05:17:26.5 |
HIP 42880 |
18.89 |
| 2026-03-27 00:00 |
08:43:20.70 |
-05:17:18.3 |
HIP 42880 |
18.92 |
| 2026-03-27 12:00 |
08:43:20.08 |
-05:17:10.2 |
HIP 42880 |
18.96 |
| 2026-03-28 00:00 |
08:43:19.48 |
-05:17:02.0 |
HIP 42880 |
19.00 |
| 2026-03-28 12:00 |
08:43:18.88 |
-05:16:53.8 |
HIP 42880 |
19.04 |
| 2026-03-29 00:00 |
08:43:18.29 |
-05:16:45.7 |
HIP 42880 |
19.08 |
| 2026-03-29 12:00 |
08:43:17.71 |
-05:16:37.5 |
HIP 42880 |
19.12 |
| 2026-03-30 00:00 |
08:43:17.13 |
-05:16:29.4 |
HIP 42880 |
19.16 |
| 2026-03-30 12:00 |
08:43:16.57 |
-05:16:21.2 |
HIP 42880 |
19.20 |
| 2026-03-31 00:00 |
08:43:16.01 |
-05:16:13.1 |
HIP 42880 |
19.24 |
| 2026-03-31 12:00 |
08:43:15.47 |
-05:16:04.9 |
HIP 42880 |
19.28 |
| 2026-04-01 00:00 |
08:43:14.93 |
-05:15:56.8 |
HIP 42880 |
19.32 |
| 2026-04-01 12:00 |
08:43:14.40 |
-05:15:48.6 |
HIP 42880 |
19.36 |
| 2026-04-02 00:00 |
08:43:13.88 |
-05:15:40.5 |
HIP 42880 |
19.40 |
| 2026-04-02 12:00 |
08:43:13.36 |
-05:15:32.4 |
HIP 42880 |
19.44 |
| 2026-04-03 00:00 |
08:43:12.86 |
-05:15:24.3 |
HIP 42880 |
19.49 |
| 2026-04-03 12:00 |
08:43:12.37 |
-05:15:16.2 |
HIP 42880 |
19.53 |
| 2026-04-04 00:00 |
08:43:11.88 |
-05:15:08.1 |
HIP 42880 |
19.57 |
| 2026-04-04 12:00 |
08:43:11.40 |
-05:15:00.0 |
HIP 42880 |
19.60 |
| 2026-04-05 00:00 |
08:43:10.94 |
-05:14:51.9 |
HIP 42880 |
19.64 |
| 2026-04-05 12:00 |
08:43:10.48 |
-05:14:43.8 |
HIP 42880 |
19.68 |
| 2026-04-06 00:00 |
08:43:10.03 |
-05:14:35.8 |
HIP 42880 |
19.72 |
| 2026-04-06 12:00 |
08:43:09.59 |
-05:14:27.7 |
HIP 42880 |
19.76 |
| 2026-04-07 00:00 |
08:43:09.16 |
-05:14:19.7 |
HIP 42880 |
19.80 |
| 2026-04-07 12:00 |
08:43:08.73 |
-05:14:11.7 |
HIP 42880 |
19.83 |
| 2026-04-08 00:00 |
08:43:08.32 |
-05:14:03.7 |
HIP 42880 |
19.87 |
| 2026-04-08 12:00 |
08:43:07.92 |
-05:13:55.7 |
HIP 42880 |
19.91 |
| 2026-04-09 00:00 |
08:43:07.52 |
-05:13:47.7 |
HIP 42880 |
19.94 |
| 2026-04-09 12:00 |
08:43:07.14 |
-05:13:39.7 |
HIP 42880 |
19.98 |
| 2026-04-10 00:00 |
08:43:06.76 |
-05:13:31.7 |
HIP 42880 |
20.01 |
| 2026-04-10 12:00 |
08:43:06.39 |
-05:13:23.8 |
HIP 42880 |
20.04 |
| 2026-04-11 00:00 |
08:43:06.03 |
-05:13:15.9 |
HIP 42880 |
20.07 |
| 2026-04-11 12:00 |
08:43:05.69 |
-05:13:08.0 |
HIP 42880 |
20.11 |
| 2026-04-12 00:00 |
08:43:05.35 |
-05:13:00.1 |
HIP 42880 |
20.14 |
| 2026-04-12 12:00 |
08:43:05.02 |
-05:12:52.2 |
HIP 42880 |
20.17 |
| 2026-04-13 00:00 |
08:43:04.70 |
-05:12:44.4 |
HIP 42880 |
20.19 |
| 2026-04-13 12:00 |
08:43:04.39 |
-05:12:36.5 |
HIP 42880 |
20.22 |
| 2026-04-14 00:00 |
08:43:04.08 |
-05:12:28.7 |
HIP 42880 |
20.25 |
| 2026-04-14 12:00 |
08:43:03.79 |
-05:12:20.9 |
HIP 42880 |
20.27 |
| 2026-04-15 00:00 |
08:43:03.51 |
-05:12:13.2 |
HIP 42880 |
20.30 |
| 2026-04-15 12:00 |
08:43:03.24 |
-05:12:05.4 |
HIP 42880 |
20.32 |
| 2026-04-16 00:00 |
08:43:02.97 |
-05:11:57.7 |
HIP 42880 |
20.34 |