C/1949 N1 (Bappu-Bok-Newkirk)
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) |
| 2026-02-03 00:00 |
05:52:55.26 |
-44:05:14.3 |
HIP 27693 |
13.00 |
| 2026-02-03 12:00 |
05:52:54.04 |
-44:05:02.6 |
HIP 27693 |
12.73 |
| 2026-02-04 00:00 |
05:52:52.82 |
-44:04:50.7 |
HIP 27693 |
12.46 |
| 2026-02-04 12:00 |
05:52:51.62 |
-44:04:38.8 |
HIP 27693 |
12.19 |
| 2026-02-05 00:00 |
05:52:50.43 |
-44:04:26.7 |
HIP 27693 |
11.92 |
| 2026-02-05 12:00 |
05:52:49.25 |
-44:04:14.6 |
HIP 27693 |
11.66 |
| 2026-02-06 00:00 |
05:52:48.08 |
-44:04:02.4 |
HIP 27693 |
11.40 |
| 2026-02-06 12:00 |
05:52:46.92 |
-44:03:50.0 |
HIP 27693 |
11.15 |
| 2026-02-07 00:00 |
05:52:45.78 |
-44:03:37.6 |
HIP 27693 |
10.90 |
| 2026-02-07 12:00 |
05:52:44.64 |
-44:03:25.1 |
HIP 27693 |
10.65 |
| 2026-02-08 00:00 |
05:52:43.52 |
-44:03:12.4 |
HIP 27693 |
10.40 |
| 2026-02-08 12:00 |
05:52:42.41 |
-44:02:59.7 |
HIP 27693 |
10.16 |
| 2026-02-09 00:00 |
05:52:41.31 |
-44:02:46.9 |
HIP 27693 |
9.92 |
| 2026-02-09 12:00 |
05:52:40.22 |
-44:02:34.0 |
HIP 27693 |
9.69 |
| 2026-02-10 00:00 |
05:52:39.14 |
-44:02:21.0 |
HIP 27693 |
9.47 |
| 2026-02-10 12:00 |
05:52:38.08 |
-44:02:07.9 |
HIP 27693 |
9.25 |
| 2026-02-11 00:00 |
05:52:37.03 |
-44:01:54.7 |
HIP 27693 |
9.03 |
| 2026-02-11 12:00 |
05:52:35.99 |
-44:01:41.5 |
HIP 27693 |
8.82 |
| 2026-02-12 00:00 |
05:52:34.96 |
-44:01:28.1 |
HIP 27693 |
8.62 |
| 2026-02-12 12:00 |
05:52:33.94 |
-44:01:14.7 |
HIP 27693 |
8.42 |
| 2026-02-13 00:00 |
05:52:32.94 |
-44:01:01.1 |
HIP 27693 |
8.24 |
| 2026-02-13 12:00 |
05:52:31.95 |
-44:00:47.5 |
HIP 27693 |
8.06 |
| 2026-02-14 00:00 |
05:52:30.97 |
-44:00:33.8 |
HIP 27693 |
7.89 |
| 2026-02-14 12:00 |
05:52:30.00 |
-44:00:20.0 |
HIP 27693 |
7.73 |
| 2026-02-15 00:00 |
05:52:29.05 |
-44:00:06.2 |
HIP 27693 |
7.58 |
| 2026-02-15 12:00 |
05:52:28.11 |
-43:59:52.2 |
HIP 27693 |
7.44 |
| 2026-02-16 00:00 |
05:52:27.18 |
-43:59:38.2 |
HIP 27693 |
7.31 |
| 2026-02-16 12:00 |
05:52:26.27 |
-43:59:24.1 |
HIP 27693 |
7.19 |
| 2026-02-17 00:00 |
05:52:25.37 |
-43:59:10.0 |
HIP 27693 |
7.08 |
| 2026-02-17 12:00 |
05:52:24.48 |
-43:58:55.7 |
HIP 27693 |
6.99 |
| 2026-02-18 00:00 |
05:52:23.60 |
-43:58:41.4 |
HIP 27693 |
6.91 |
| 2026-02-18 12:00 |
05:52:22.74 |
-43:58:27.0 |
HIP 27693 |
6.85 |
| 2026-02-19 00:00 |
05:52:21.89 |
-43:58:12.6 |
HIP 27693 |
6.79 |
| 2026-02-19 12:00 |
05:52:21.06 |
-43:57:58.0 |
HIP 27693 |
6.76 |
| 2026-02-20 00:00 |
05:52:20.23 |
-43:57:43.4 |
HIP 27693 |
6.73 |
| 2026-02-20 12:00 |
05:52:19.42 |
-43:57:28.8 |
HIP 27693 |
6.72 |
| 2026-02-21 00:00 |
05:52:18.63 |
-43:57:14.0 |
HIP 27693 |
6.73 |
| 2026-02-21 12:00 |
05:52:17.85 |
-43:56:59.2 |
HIP 27693 |
6.75 |
| 2026-02-22 00:00 |
05:52:17.08 |
-43:56:44.4 |
HIP 27693 |
6.79 |
| 2026-02-22 12:00 |
05:52:16.32 |
-43:56:29.5 |
HIP 27693 |
6.84 |
| 2026-02-23 00:00 |
05:52:15.58 |
-43:56:14.5 |
HIP 27693 |
6.90 |
| 2026-02-23 12:00 |
05:52:14.85 |
-43:55:59.4 |
HIP 27693 |
6.98 |
| 2026-02-24 00:00 |
05:52:14.14 |
-43:55:44.3 |
HIP 27693 |
7.06 |