メタデータ
| 項目 |
値 |
| Designation |
C/1958 D1 (Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1958-04-16T07:16:54.157440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1958-04-26.0000000 |
| e |
0.99991611 |
| q (au) |
1.322687 |
| a (au) |
15766.142934 |
| i (deg) |
15.787940 |
| Ω (om, deg) |
151.194462 |
| ω (w, deg) |
16.465841 |
| M (ma, deg) |
0.000005 |
等級
散乱 + 全体線形
$$
M_a = (6.825 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.825 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1958-02-22 |
1958-04-15 |
+53.8968 |
-6.982 |
| 1958-04-17 |
1958-09-15 |
+11.0165 |
-1.782 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
22:25:37.55 |
-10:44:59.1 |
HIP 110796 |
19.10 |
| 2026-03-26 12:00 |
22:25:38.64 |
-10:44:53.1 |
HIP 110796 |
18.81 |
| 2026-03-27 00:00 |
22:25:39.72 |
-10:44:47.2 |
HIP 110796 |
18.53 |
| 2026-03-27 12:00 |
22:25:40.80 |
-10:44:41.2 |
HIP 110796 |
18.25 |
| 2026-03-28 00:00 |
22:25:41.87 |
-10:44:35.3 |
HIP 110796 |
17.97 |
| 2026-03-28 12:00 |
22:25:42.93 |
-10:44:29.4 |
HIP 110796 |
17.69 |
| 2026-03-29 00:00 |
22:25:43.99 |
-10:44:23.6 |
HIP 110796 |
17.41 |
| 2026-03-29 12:00 |
22:25:45.04 |
-10:44:17.8 |
HIP 110796 |
17.13 |
| 2026-03-30 00:00 |
22:25:46.09 |
-10:44:12.0 |
HIP 110796 |
16.86 |
| 2026-03-30 12:00 |
22:25:47.13 |
-10:44:06.2 |
HIP 110796 |
16.59 |
| 2026-03-31 00:00 |
22:25:48.17 |
-10:44:00.5 |
HIP 110796 |
16.32 |
| 2026-03-31 12:00 |
22:25:49.20 |
-10:43:54.9 |
HIP 110796 |
16.05 |
| 2026-04-01 00:00 |
22:25:50.22 |
-10:43:49.3 |
HIP 110796 |
15.78 |
| 2026-04-01 12:00 |
22:25:51.24 |
-10:43:43.7 |
HIP 110796 |
15.51 |
| 2026-04-02 00:00 |
22:25:52.25 |
-10:43:38.1 |
HIP 110796 |
15.25 |
| 2026-04-02 12:00 |
22:25:53.26 |
-10:43:32.6 |
HIP 110796 |
14.98 |
| 2026-04-03 00:00 |
22:25:54.26 |
-10:43:27.1 |
HIP 110796 |
14.72 |
| 2026-04-03 12:00 |
22:25:55.25 |
-10:43:21.7 |
HIP 110796 |
14.46 |
| 2026-04-04 00:00 |
22:25:56.24 |
-10:43:16.3 |
HIP 110796 |
14.21 |
| 2026-04-04 12:00 |
22:25:57.21 |
-10:43:10.9 |
HIP 110796 |
13.95 |
| 2026-04-05 00:00 |
22:25:58.19 |
-10:43:05.6 |
HIP 110796 |
13.69 |
| 2026-04-05 12:00 |
22:25:59.15 |
-10:43:00.3 |
HIP 110796 |
13.44 |
| 2026-04-06 00:00 |
22:26:00.11 |
-10:42:55.1 |
HIP 110796 |
13.19 |
| 2026-04-06 12:00 |
22:26:01.07 |
-10:42:49.9 |
HIP 110796 |
12.94 |
| 2026-04-07 00:00 |
22:26:02.01 |
-10:42:44.7 |
HIP 110796 |
12.70 |
| 2026-04-07 12:00 |
22:26:02.95 |
-10:42:39.6 |
HIP 110796 |
12.45 |
| 2026-04-08 00:00 |
22:26:03.88 |
-10:42:34.5 |
HIP 110796 |
12.21 |
| 2026-04-08 12:00 |
22:26:04.81 |
-10:42:29.5 |
HIP 110796 |
11.96 |
| 2026-04-09 00:00 |
22:26:05.72 |
-10:42:24.5 |
HIP 110796 |
11.73 |
| 2026-04-09 12:00 |
22:26:06.63 |
-10:42:19.6 |
HIP 110796 |
11.49 |
| 2026-04-10 00:00 |
22:26:07.54 |
-10:42:14.7 |
HIP 110796 |
11.25 |
| 2026-04-10 12:00 |
22:26:08.43 |
-10:42:09.8 |
HIP 110796 |
11.02 |
| 2026-04-11 00:00 |
22:26:09.32 |
-10:42:05.0 |
HIP 110796 |
10.79 |
| 2026-04-11 12:00 |
22:26:10.20 |
-10:42:00.2 |
HIP 110796 |
10.56 |
| 2026-04-12 00:00 |
22:26:11.08 |
-10:41:55.5 |
HIP 110796 |
10.33 |
| 2026-04-12 12:00 |
22:26:11.94 |
-10:41:50.8 |
HIP 110796 |
10.10 |
| 2026-04-13 00:00 |
22:26:12.80 |
-10:41:46.2 |
HIP 110796 |
9.88 |
| 2026-04-13 12:00 |
22:26:13.65 |
-10:41:41.6 |
HIP 110796 |
9.66 |
| 2026-04-14 00:00 |
22:26:14.49 |
-10:41:37.1 |
HIP 110796 |
9.44 |
| 2026-04-14 12:00 |
22:26:15.33 |
-10:41:32.6 |
HIP 110796 |
9.22 |
| 2026-04-15 00:00 |
22:26:16.16 |
-10:41:28.1 |
HIP 110796 |
9.01 |
| 2026-04-15 12:00 |
22:26:16.98 |
-10:41:23.7 |
HIP 110796 |
8.79 |
| 2026-04-16 00:00 |
22:26:17.79 |
-10:41:19.4 |
HIP 110796 |
8.58 |