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 |
-0.998 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
05:54:08.42 |
-43:12:41.5 |
HIP 27767 |
18.43 |
| 2026-06-03 00:00 |
05:54:09.94 |
-43:12:36.9 |
HIP 27767 |
18.67 |
| 2026-06-03 12:00 |
05:54:11.47 |
-43:12:32.4 |
HIP 27767 |
18.91 |
| 2026-06-04 00:00 |
05:54:13.00 |
-43:12:28.1 |
HIP 27767 |
19.15 |
| 2026-06-04 12:00 |
05:54:14.53 |
-43:12:23.9 |
HIP 27767 |
19.39 |
| 2026-06-05 00:00 |
05:54:16.07 |
-43:12:19.8 |
HIP 27835 |
19.63 |
| 2026-06-05 12:00 |
05:54:17.61 |
-43:12:15.8 |
HIP 27835 |
19.71 |
| 2026-06-06 00:00 |
05:54:19.16 |
-43:12:12.0 |
HIP 27835 |
19.80 |
| 2026-06-06 12:00 |
05:54:20.71 |
-43:12:08.3 |
HIP 27835 |
19.90 |
| 2026-06-07 00:00 |
05:54:22.26 |
-43:12:04.7 |
HIP 27835 |
20.00 |
| 2026-06-07 12:00 |
05:54:23.81 |
-43:12:01.3 |
HIP 27835 |
20.11 |
| 2026-06-08 00:00 |
05:54:25.37 |
-43:11:58.0 |
HIP 27835 |
20.22 |
| 2026-06-08 12:00 |
05:54:26.93 |
-43:11:54.9 |
HIP 27835 |
20.34 |
| 2026-06-09 00:00 |
05:54:28.49 |
-43:11:51.8 |
HIP 27835 |
20.46 |
| 2026-06-09 12:00 |
05:54:30.06 |
-43:11:48.9 |
HIP 27835 |
20.59 |
| 2026-06-10 00:00 |
05:54:31.62 |
-43:11:46.2 |
HIP 27835 |
20.73 |
| 2026-06-10 12:00 |
05:54:33.19 |
-43:11:43.5 |
HIP 27835 |
20.87 |
| 2026-06-11 00:00 |
05:54:34.77 |
-43:11:41.0 |
HIP 27835 |
21.01 |
| 2026-06-11 12:00 |
05:54:36.34 |
-43:11:38.7 |
HIP 27835 |
21.17 |
| 2026-06-12 00:00 |
05:54:37.92 |
-43:11:36.5 |
HIP 27835 |
21.32 |
| 2026-06-12 12:00 |
05:54:39.49 |
-43:11:34.4 |
HIP 27835 |
21.48 |
| 2026-06-13 00:00 |
05:54:41.07 |
-43:11:32.4 |
HIP 27835 |
21.65 |
| 2026-06-13 12:00 |
05:54:42.66 |
-43:11:30.6 |
HIP 27835 |
21.82 |
| 2026-06-14 00:00 |
05:54:44.24 |
-43:11:28.9 |
HIP 27835 |
21.99 |
| 2026-06-14 12:00 |
05:54:45.82 |
-43:11:27.4 |
HIP 27835 |
22.17 |
| 2026-06-15 00:00 |
05:54:47.41 |
-43:11:26.0 |
HIP 27835 |
22.35 |
| 2026-06-15 12:00 |
05:54:49.00 |
-43:11:24.7 |
HIP 27835 |
22.54 |
| 2026-06-16 00:00 |
05:54:50.59 |
-43:11:23.6 |
HIP 27835 |
22.73 |
| 2026-06-16 12:00 |
05:54:52.17 |
-43:11:22.6 |
HIP 27835 |
22.92 |
| 2026-06-17 00:00 |
05:54:53.76 |
-43:11:21.7 |
HIP 27835 |
23.12 |
| 2026-06-17 12:00 |
05:54:55.36 |
-43:11:21.0 |
HIP 27835 |
23.32 |
| 2026-06-18 00:00 |
05:54:56.95 |
-43:11:20.4 |
HIP 27835 |
23.52 |
| 2026-06-18 12:00 |
05:54:58.54 |
-43:11:19.9 |
HIP 27835 |
23.73 |
| 2026-06-19 00:00 |
05:55:00.13 |
-43:11:19.6 |
HIP 27835 |
23.94 |
| 2026-06-19 12:00 |
05:55:01.72 |
-43:11:19.4 |
HIP 27974 |
24.00 |
| 2026-06-20 00:00 |
05:55:03.32 |
-43:11:19.4 |
HIP 27974 |
24.01 |
| 2026-06-20 12:00 |
05:55:04.91 |
-43:11:19.5 |
HIP 27974 |
24.02 |
| 2026-06-21 00:00 |
05:55:06.50 |
-43:11:19.7 |
HIP 27974 |
24.04 |
| 2026-06-21 12:00 |
05:55:08.09 |
-43:11:20.1 |
HIP 27974 |
24.06 |
| 2026-06-22 00:00 |
05:55:09.69 |
-43:11:20.6 |
HIP 27974 |
24.09 |