メタデータ
| 項目 |
値 |
| Designation |
C/1949 N1 (Bappu-Bok-Newkirk) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1949-10-26T13:04:54.004800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
30 |
| 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) |
1950-05-10.0000000 |
| e |
0.99878218 |
| q (au) |
2.058250 |
| a (au) |
1690.114081 |
| i (deg) |
105.767785 |
| Ω (om, deg) |
309.709849 |
| ω (w, deg) |
89.525738 |
| M (ma, deg) |
0.002773 |
等級
散乱 + 全体線形
$$
M_a = (4.349 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.349 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.987 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-05-12 00:00 |
05:53:07.94 |
-43:17:58.1 |
HIP 27767 |
13.23 |
| 2026-05-12 12:00 |
05:53:09.20 |
-43:17:48.2 |
HIP 27767 |
13.20 |
| 2026-05-13 00:00 |
05:53:10.47 |
-43:17:38.5 |
HIP 27767 |
13.17 |
| 2026-05-13 12:00 |
05:53:11.75 |
-43:17:28.8 |
HIP 27767 |
13.16 |
| 2026-05-14 00:00 |
05:53:13.04 |
-43:17:19.3 |
HIP 27767 |
13.15 |
| 2026-05-14 12:00 |
05:53:14.34 |
-43:17:09.9 |
HIP 27767 |
13.15 |
| 2026-05-15 00:00 |
05:53:15.64 |
-43:17:00.6 |
HIP 27767 |
13.16 |
| 2026-05-15 12:00 |
05:53:16.95 |
-43:16:51.4 |
HIP 27767 |
13.18 |
| 2026-05-16 00:00 |
05:53:18.27 |
-43:16:42.4 |
HIP 27767 |
13.21 |
| 2026-05-16 12:00 |
05:53:19.60 |
-43:16:33.4 |
HIP 27767 |
13.24 |
| 2026-05-17 00:00 |
05:53:20.93 |
-43:16:24.6 |
HIP 27767 |
13.28 |
| 2026-05-17 12:00 |
05:53:22.27 |
-43:16:15.9 |
HIP 27767 |
13.34 |
| 2026-05-18 00:00 |
05:53:23.62 |
-43:16:07.3 |
HIP 27767 |
13.40 |
| 2026-05-18 12:00 |
05:53:24.97 |
-43:15:58.8 |
HIP 27767 |
13.46 |
| 2026-05-19 00:00 |
05:53:26.34 |
-43:15:50.4 |
HIP 27767 |
13.54 |
| 2026-05-19 12:00 |
05:53:27.71 |
-43:15:42.2 |
HIP 27767 |
13.62 |
| 2026-05-20 00:00 |
05:53:29.08 |
-43:15:34.1 |
HIP 27767 |
13.71 |
| 2026-05-20 12:00 |
05:53:30.47 |
-43:15:26.1 |
HIP 27767 |
13.81 |
| 2026-05-21 00:00 |
05:53:31.85 |
-43:15:18.2 |
HIP 27767 |
13.92 |
| 2026-05-21 12:00 |
05:53:33.25 |
-43:15:10.4 |
HIP 27767 |
14.03 |
| 2026-05-22 00:00 |
05:53:34.65 |
-43:15:02.8 |
HIP 27767 |
14.15 |
| 2026-05-22 12:00 |
05:53:36.06 |
-43:14:55.3 |
HIP 27767 |
14.28 |
| 2026-05-23 00:00 |
05:53:37.48 |
-43:14:47.9 |
HIP 27767 |
14.41 |
| 2026-05-23 12:00 |
05:53:38.90 |
-43:14:40.6 |
HIP 27767 |
14.55 |
| 2026-05-24 00:00 |
05:53:40.32 |
-43:14:33.5 |
HIP 27767 |
14.70 |
| 2026-05-24 12:00 |
05:53:41.76 |
-43:14:26.4 |
HIP 27767 |
14.85 |
| 2026-05-25 00:00 |
05:53:43.19 |
-43:14:19.5 |
HIP 27767 |
15.01 |
| 2026-05-25 12:00 |
05:53:44.64 |
-43:14:12.8 |
HIP 27767 |
15.17 |
| 2026-05-26 00:00 |
05:53:46.09 |
-43:14:06.1 |
HIP 27767 |
15.34 |
| 2026-05-26 12:00 |
05:53:47.54 |
-43:13:59.6 |
HIP 27767 |
15.52 |
| 2026-05-27 00:00 |
05:53:49.00 |
-43:13:53.2 |
HIP 27767 |
15.70 |
| 2026-05-27 12:00 |
05:53:50.47 |
-43:13:46.9 |
HIP 27767 |
15.88 |
| 2026-05-28 00:00 |
05:53:51.94 |
-43:13:40.8 |
HIP 27767 |
16.07 |
| 2026-05-28 12:00 |
05:53:53.41 |
-43:13:34.7 |
HIP 27767 |
16.27 |
| 2026-05-29 00:00 |
05:53:54.89 |
-43:13:28.8 |
HIP 27767 |
16.47 |
| 2026-05-29 12:00 |
05:53:56.38 |
-43:13:23.1 |
HIP 27767 |
16.67 |
| 2026-05-30 00:00 |
05:53:57.87 |
-43:13:17.4 |
HIP 27767 |
16.88 |
| 2026-05-30 12:00 |
05:53:59.36 |
-43:13:11.9 |
HIP 27767 |
17.09 |
| 2026-05-31 00:00 |
05:54:00.86 |
-43:13:06.5 |
HIP 27767 |
17.31 |
| 2026-05-31 12:00 |
05:54:02.36 |
-43:13:01.3 |
HIP 27767 |
17.52 |
| 2026-06-01 00:00 |
05:54:03.87 |
-43:12:56.1 |
HIP 27767 |
17.75 |
| 2026-06-01 12:00 |
05:54:05.38 |
-43:12:51.1 |
HIP 27767 |
17.97 |
| 2026-06-02 00:00 |
05:54:06.90 |
-43:12:46.3 |
HIP 27767 |
18.20 |