メタデータ
| 項目 |
値 |
| Designation |
C/1975 N1 (Kobayashi-Berger-Milon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-09-05T08:02:10.029120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
390 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
11.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1975-08-09.0000000 |
| e |
1.00009176 |
| q (au) |
0.425564 |
| a (au) |
-4637.833606 |
| i (deg) |
80.781301 |
| Ω (om, deg) |
296.352017 |
| ω (w, deg) |
116.969468 |
| M (ma, deg) |
-0.000085 |
等級
散乱 + 全体線形
$$
M_a = (7.113 + 3.526\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.113 |
| n |
3.526 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.975 |
| δ90 |
8.837 |
| 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 |
05:09:58.24 |
-86:27:48.2 |
HIP 25412 |
15.74 |
| 2026-05-12 12:00 |
05:10:19.94 |
-86:27:38.8 |
HIP 25412 |
15.38 |
| 2026-05-13 00:00 |
05:10:41.71 |
-86:27:29.5 |
HIP 25412 |
15.01 |
| 2026-05-13 12:00 |
05:11:03.54 |
-86:27:20.3 |
HIP 25412 |
14.65 |
| 2026-05-14 00:00 |
05:11:25.44 |
-86:27:11.3 |
HIP 25412 |
14.28 |
| 2026-05-14 12:00 |
05:11:47.40 |
-86:27:02.5 |
HIP 25412 |
13.92 |
| 2026-05-15 00:00 |
05:12:09.42 |
-86:26:53.7 |
HIP 25412 |
13.55 |
| 2026-05-15 12:00 |
05:12:31.50 |
-86:26:45.2 |
HIP 25412 |
13.19 |
| 2026-05-16 00:00 |
05:12:53.65 |
-86:26:36.7 |
HIP 25412 |
12.82 |
| 2026-05-16 12:00 |
05:13:15.85 |
-86:26:28.4 |
HIP 25412 |
12.45 |
| 2026-05-17 00:00 |
05:13:38.11 |
-86:26:20.2 |
HIP 25412 |
12.08 |
| 2026-05-17 12:00 |
05:14:00.42 |
-86:26:12.2 |
HIP 25412 |
11.72 |
| 2026-05-18 00:00 |
05:14:22.79 |
-86:26:04.3 |
HIP 25412 |
11.35 |
| 2026-05-18 12:00 |
05:14:45.22 |
-86:25:56.5 |
HIP 25412 |
10.98 |
| 2026-05-19 00:00 |
05:15:07.69 |
-86:25:48.9 |
HIP 25412 |
10.61 |
| 2026-05-19 12:00 |
05:15:30.22 |
-86:25:41.4 |
HIP 25412 |
10.24 |
| 2026-05-20 00:00 |
05:15:52.80 |
-86:25:34.1 |
HIP 25412 |
9.87 |
| 2026-05-20 12:00 |
05:16:15.43 |
-86:25:26.9 |
HIP 25412 |
9.50 |
| 2026-05-21 00:00 |
05:16:38.11 |
-86:25:19.8 |
HIP 25412 |
9.13 |
| 2026-05-21 12:00 |
05:17:00.84 |
-86:25:12.9 |
HIP 25412 |
8.76 |
| 2026-05-22 00:00 |
05:17:23.61 |
-86:25:06.1 |
HIP 25412 |
8.39 |
| 2026-05-22 12:00 |
05:17:46.42 |
-86:24:59.5 |
HIP 25412 |
8.02 |
| 2026-05-23 00:00 |
05:18:09.29 |
-86:24:53.0 |
HIP 25412 |
7.65 |
| 2026-05-23 12:00 |
05:18:32.19 |
-86:24:46.6 |
HIP 25412 |
7.28 |
| 2026-05-24 00:00 |
05:18:55.14 |
-86:24:40.4 |
HIP 25412 |
6.90 |
| 2026-05-24 12:00 |
05:19:18.12 |
-86:24:34.3 |
HIP 25412 |
6.53 |
| 2026-05-25 00:00 |
05:19:41.15 |
-86:24:28.4 |
HIP 25412 |
6.16 |
| 2026-05-25 12:00 |
05:20:04.22 |
-86:24:22.6 |
HIP 25412 |
5.79 |
| 2026-05-26 00:00 |
05:20:27.33 |
-86:24:16.9 |
HIP 25412 |
5.41 |
| 2026-05-26 12:00 |
05:20:50.47 |
-86:24:11.4 |
HIP 25412 |
5.04 |
| 2026-05-27 00:00 |
05:21:13.65 |
-86:24:06.0 |
HIP 25412 |
4.67 |
| 2026-05-27 12:00 |
05:21:36.87 |
-86:24:00.8 |
HIP 25412 |
4.29 |
| 2026-05-28 00:00 |
05:22:00.12 |
-86:23:55.7 |
HIP 25412 |
3.92 |
| 2026-05-28 12:00 |
05:22:23.41 |
-86:23:50.7 |
HIP 25412 |
3.55 |
| 2026-05-29 00:00 |
05:22:46.73 |
-86:23:45.9 |
HIP 25412 |
3.17 |
| 2026-05-29 12:00 |
05:23:10.08 |
-86:23:41.3 |
HIP 25412 |
2.80 |
| 2026-05-30 00:00 |
05:23:33.46 |
-86:23:36.7 |
HIP 25412 |
2.42 |
| 2026-05-30 12:00 |
05:23:56.88 |
-86:23:32.3 |
HIP 25412 |
2.05 |
| 2026-05-31 00:00 |
05:24:20.32 |
-86:23:28.1 |
HIP 25412 |
1.67 |
| 2026-05-31 12:00 |
05:24:43.80 |
-86:23:24.0 |
HIP 25412 |
1.30 |
| 2026-06-01 00:00 |
05:25:07.30 |
-86:23:20.0 |
HIP 25412 |
0.93 |
| 2026-06-01 12:00 |
05:25:30.83 |
-86:23:16.2 |
HIP 25412 |
0.56 |
| 2026-06-02 00:00 |
05:25:54.39 |
-86:23:12.5 |
HIP 25412 |
0.21 |