메타데이터
| 항목 |
값 |
| Designation |
C/1976 E1 (Bradfield) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1976-02-25T01:22:13.275840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1976-03-12.0000000 |
| e |
0.99987070 |
| q (au) |
0.678293 |
| a (au) |
5245.712828 |
| i (deg) |
147.778213 |
| Ω (om, deg) |
70.213442 |
| ω (w, deg) |
221.765775 |
| M (ma, deg) |
0.000041 |
밝기
산란 + 전체 선형
$$
M_a = (14.087 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.087 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.972 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
02:14:55.63 |
+30:19:31.7 |
HIP 10453 |
5.08 |
| 2026-03-26 12:00 |
02:14:57.09 |
+30:19:34.6 |
HIP 10453 |
5.22 |
| 2026-03-27 00:00 |
02:14:58.57 |
+30:19:37.6 |
HIP 10453 |
5.39 |
| 2026-03-27 12:00 |
02:15:00.05 |
+30:19:40.6 |
HIP 10453 |
5.57 |
| 2026-03-28 00:00 |
02:15:01.53 |
+30:19:43.8 |
HIP 10453 |
5.76 |
| 2026-03-28 12:00 |
02:15:03.03 |
+30:19:47.0 |
HIP 10453 |
5.96 |
| 2026-03-29 00:00 |
02:15:04.53 |
+30:19:50.3 |
HIP 10453 |
6.17 |
| 2026-03-29 12:00 |
02:15:06.04 |
+30:19:53.7 |
HIP 10453 |
6.40 |
| 2026-03-30 00:00 |
02:15:07.55 |
+30:19:57.2 |
HIP 10453 |
6.63 |
| 2026-03-30 12:00 |
02:15:09.08 |
+30:20:00.8 |
HIP 10453 |
6.87 |
| 2026-03-31 00:00 |
02:15:10.60 |
+30:20:04.4 |
HIP 10453 |
7.12 |
| 2026-03-31 12:00 |
02:15:12.14 |
+30:20:08.1 |
HIP 10453 |
7.38 |
| 2026-04-01 00:00 |
02:15:13.68 |
+30:20:11.9 |
HIP 10453 |
7.64 |
| 2026-04-01 12:00 |
02:15:15.23 |
+30:20:15.8 |
HIP 10453 |
7.91 |
| 2026-04-02 00:00 |
02:15:16.78 |
+30:20:19.7 |
HIP 10453 |
8.19 |
| 2026-04-02 12:00 |
02:15:18.34 |
+30:20:23.8 |
HIP 10453 |
8.47 |
| 2026-04-03 00:00 |
02:15:19.90 |
+30:20:27.9 |
HIP 10453 |
8.76 |
| 2026-04-03 12:00 |
02:15:21.47 |
+30:20:32.1 |
HIP 10453 |
9.05 |
| 2026-04-04 00:00 |
02:15:23.05 |
+30:20:36.4 |
HIP 10453 |
9.35 |
| 2026-04-04 12:00 |
02:15:24.63 |
+30:20:40.7 |
HIP 10453 |
9.64 |
| 2026-04-05 00:00 |
02:15:26.22 |
+30:20:45.1 |
HIP 10453 |
9.95 |
| 2026-04-05 12:00 |
02:15:27.81 |
+30:20:49.6 |
HIP 10453 |
10.26 |
| 2026-04-06 00:00 |
02:15:29.41 |
+30:20:54.2 |
HIP 10453 |
10.57 |
| 2026-04-06 12:00 |
02:15:31.01 |
+30:20:58.9 |
HIP 10453 |
10.88 |
| 2026-04-07 00:00 |
02:15:32.62 |
+30:21:03.6 |
HIP 10453 |
11.20 |
| 2026-04-07 12:00 |
02:15:34.23 |
+30:21:08.4 |
HIP 10453 |
11.52 |
| 2026-04-08 00:00 |
02:15:35.85 |
+30:21:13.3 |
HIP 10453 |
11.84 |
| 2026-04-08 12:00 |
02:15:37.47 |
+30:21:18.2 |
HIP 10453 |
12.17 |
| 2026-04-09 00:00 |
02:15:39.10 |
+30:21:23.3 |
HIP 10453 |
12.50 |
| 2026-04-09 12:00 |
02:15:40.73 |
+30:21:28.4 |
HIP 10453 |
12.83 |
| 2026-04-10 00:00 |
02:15:42.36 |
+30:21:33.6 |
HIP 10453 |
13.16 |
| 2026-04-10 12:00 |
02:15:44.00 |
+30:21:38.8 |
HIP 10453 |
13.50 |
| 2026-04-11 00:00 |
02:15:45.64 |
+30:21:44.2 |
HIP 10453 |
13.83 |
| 2026-04-11 12:00 |
02:15:47.29 |
+30:21:49.6 |
HIP 10453 |
14.17 |
| 2026-04-12 00:00 |
02:15:48.94 |
+30:21:55.0 |
HIP 10453 |
14.51 |
| 2026-04-12 12:00 |
02:15:50.60 |
+30:22:00.6 |
HIP 10453 |
14.86 |
| 2026-04-13 00:00 |
02:15:52.26 |
+30:22:06.2 |
HIP 10453 |
15.20 |
| 2026-04-13 12:00 |
02:15:53.92 |
+30:22:11.9 |
HIP 10453 |
15.55 |
| 2026-04-14 00:00 |
02:15:55.58 |
+30:22:17.6 |
HIP 10453 |
15.90 |
| 2026-04-14 12:00 |
02:15:57.25 |
+30:22:23.5 |
HIP 10453 |
16.25 |
| 2026-04-15 00:00 |
02:15:58.92 |
+30:22:29.4 |
HIP 10453 |
16.60 |
| 2026-04-15 12:00 |
02:16:00.60 |
+30:22:35.3 |
HIP 10453 |
16.95 |
| 2026-04-16 00:00 |
02:16:02.27 |
+30:22:41.4 |
HIP 10453 |
17.31 |