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) |
| 2026-09-20 00:00 |
05:58:14.45 |
-43:43:13.3 |
HIP 28226 |
8.44 |
| 2026-09-20 12:00 |
05:58:14.48 |
-43:43:30.1 |
HIP 28226 |
8.68 |
| 2026-09-21 00:00 |
05:58:14.49 |
-43:43:46.9 |
HIP 28226 |
8.92 |
| 2026-09-21 12:00 |
05:58:14.48 |
-43:44:03.7 |
HIP 28226 |
9.16 |
| 2026-09-22 00:00 |
05:58:14.47 |
-43:44:20.4 |
HIP 28226 |
9.41 |
| 2026-09-22 12:00 |
05:58:14.44 |
-43:44:37.2 |
HIP 28226 |
9.65 |
| 2026-09-23 00:00 |
05:58:14.39 |
-43:44:54.0 |
HIP 28226 |
9.89 |
| 2026-09-23 12:00 |
05:58:14.33 |
-43:45:10.8 |
HIP 28226 |
10.14 |
| 2026-09-24 00:00 |
05:58:14.26 |
-43:45:27.6 |
HIP 28226 |
10.38 |
| 2026-09-24 12:00 |
05:58:14.17 |
-43:45:44.3 |
HIP 28226 |
10.63 |
| 2026-09-25 00:00 |
05:58:14.06 |
-43:46:01.1 |
HIP 28226 |
10.88 |
| 2026-09-25 12:00 |
05:58:13.95 |
-43:46:17.9 |
HIP 28226 |
11.12 |
| 2026-09-26 00:00 |
05:58:13.82 |
-43:46:34.7 |
HIP 28226 |
11.37 |
| 2026-09-26 12:00 |
05:58:13.67 |
-43:46:51.4 |
HIP 28226 |
11.62 |
| 2026-09-27 00:00 |
05:58:13.51 |
-43:47:08.2 |
HIP 28226 |
11.87 |
| 2026-09-27 12:00 |
05:58:13.34 |
-43:47:24.9 |
HIP 28226 |
12.12 |
| 2026-09-28 00:00 |
05:58:13.15 |
-43:47:41.6 |
HIP 28226 |
12.36 |
| 2026-09-28 12:00 |
05:58:12.95 |
-43:47:58.4 |
HIP 28226 |
12.61 |
| 2026-09-29 00:00 |
05:58:12.74 |
-43:48:15.1 |
HIP 28226 |
12.86 |
| 2026-09-29 12:00 |
05:58:12.51 |
-43:48:31.8 |
HIP 28226 |
13.11 |
| 2026-09-30 00:00 |
05:58:12.26 |
-43:48:48.5 |
HIP 28226 |
13.36 |
| 2026-09-30 12:00 |
05:58:12.01 |
-43:49:05.1 |
HIP 28226 |
13.61 |
| 2026-10-01 00:00 |
05:58:11.73 |
-43:49:21.8 |
HIP 28287 |
13.54 |
| 2026-10-01 12:00 |
05:58:11.45 |
-43:49:38.4 |
HIP 28287 |
13.29 |
| 2026-10-02 00:00 |
05:58:11.15 |
-43:49:55.0 |
HIP 28287 |
13.05 |
| 2026-10-02 12:00 |
05:58:10.83 |
-43:50:11.6 |
HIP 28287 |
12.82 |
| 2026-10-03 00:00 |
05:58:10.50 |
-43:50:28.2 |
HIP 28287 |
12.59 |
| 2026-10-03 12:00 |
05:58:10.16 |
-43:50:44.7 |
HIP 28287 |
12.36 |
| 2026-10-04 00:00 |
05:58:09.80 |
-43:51:01.3 |
HIP 28287 |
12.13 |
| 2026-10-04 12:00 |
05:58:09.43 |
-43:51:17.8 |
HIP 28287 |
11.91 |
| 2026-10-05 00:00 |
05:58:09.05 |
-43:51:34.2 |
HIP 28287 |
11.69 |
| 2026-10-05 12:00 |
05:58:08.65 |
-43:51:50.7 |
HIP 28287 |
11.48 |
| 2026-10-06 00:00 |
05:58:08.24 |
-43:52:07.1 |
HIP 28287 |
11.27 |
| 2026-10-06 12:00 |
05:58:07.81 |
-43:52:23.5 |
HIP 28287 |
11.07 |
| 2026-10-07 00:00 |
05:58:07.37 |
-43:52:39.9 |
HIP 28287 |
10.87 |
| 2026-10-07 12:00 |
05:58:06.91 |
-43:52:56.2 |
HIP 28287 |
10.67 |
| 2026-10-08 00:00 |
05:58:06.44 |
-43:53:12.5 |
HIP 28287 |
10.49 |
| 2026-10-08 12:00 |
05:58:05.96 |
-43:53:28.7 |
HIP 28287 |
10.31 |
| 2026-10-09 00:00 |
05:58:05.46 |
-43:53:44.9 |
HIP 28287 |
10.13 |
| 2026-10-09 12:00 |
05:58:04.95 |
-43:54:01.1 |
HIP 28287 |
9.97 |
| 2026-10-10 00:00 |
05:58:04.42 |
-43:54:17.3 |
HIP 28287 |
9.81 |
| 2026-10-10 12:00 |
05:58:03.88 |
-43:54:33.3 |
HIP 28287 |
9.66 |
| 2026-10-11 00:00 |
05:58:03.33 |
-43:54:49.4 |
HIP 28287 |
9.51 |