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) |
| 2026-09-20 00:00 |
02:18:44.89 |
+30:59:12.2 |
HIP 10868 |
25.59 |
| 2026-09-20 12:00 |
02:18:43.47 |
+30:59:10.9 |
HIP 10868 |
25.78 |
| 2026-09-21 00:00 |
02:18:42.05 |
+30:59:09.5 |
HIP 10868 |
25.98 |
| 2026-09-21 12:00 |
02:18:40.62 |
+30:59:08.0 |
HIP 10868 |
26.18 |
| 2026-09-22 00:00 |
02:18:39.17 |
+30:59:06.4 |
HIP 10868 |
26.38 |
| 2026-09-22 12:00 |
02:18:37.72 |
+30:59:04.7 |
HIP 10868 |
26.59 |
| 2026-09-23 00:00 |
02:18:36.26 |
+30:59:02.9 |
HIP 10868 |
26.80 |
| 2026-09-23 12:00 |
02:18:34.79 |
+30:59:01.0 |
HIP 10868 |
27.02 |
| 2026-09-24 00:00 |
02:18:33.31 |
+30:58:59.1 |
HIP 10868 |
27.24 |
| 2026-09-24 12:00 |
02:18:31.82 |
+30:58:57.0 |
HIP 10868 |
27.47 |
| 2026-09-25 00:00 |
02:18:30.32 |
+30:58:54.9 |
HIP 10868 |
27.70 |
| 2026-09-25 12:00 |
02:18:28.81 |
+30:58:52.7 |
HIP 10590 |
27.39 |
| 2026-09-26 00:00 |
02:18:27.29 |
+30:58:50.4 |
HIP 10590 |
27.08 |
| 2026-09-26 12:00 |
02:18:25.76 |
+30:58:48.0 |
HIP 10590 |
26.76 |
| 2026-09-27 00:00 |
02:18:24.23 |
+30:58:45.5 |
HIP 10590 |
26.44 |
| 2026-09-27 12:00 |
02:18:22.69 |
+30:58:42.9 |
HIP 10590 |
26.12 |
| 2026-09-28 00:00 |
02:18:21.14 |
+30:58:40.2 |
HIP 10590 |
25.80 |
| 2026-09-28 12:00 |
02:18:19.58 |
+30:58:37.5 |
HIP 10590 |
25.48 |
| 2026-09-29 00:00 |
02:18:18.01 |
+30:58:34.6 |
HIP 10590 |
25.15 |
| 2026-09-29 12:00 |
02:18:16.43 |
+30:58:31.7 |
HIP 10590 |
24.83 |
| 2026-09-30 00:00 |
02:18:14.85 |
+30:58:28.7 |
HIP 10590 |
24.50 |
| 2026-09-30 12:00 |
02:18:13.26 |
+30:58:25.6 |
HIP 10590 |
24.17 |
| 2026-10-01 00:00 |
02:18:11.66 |
+30:58:22.4 |
HIP 10590 |
23.85 |
| 2026-10-01 12:00 |
02:18:10.05 |
+30:58:19.1 |
HIP 10590 |
23.52 |
| 2026-10-02 00:00 |
02:18:08.43 |
+30:58:15.7 |
HIP 10590 |
23.19 |
| 2026-10-02 12:00 |
02:18:06.81 |
+30:58:12.3 |
HIP 10590 |
22.86 |
| 2026-10-03 00:00 |
02:18:05.18 |
+30:58:08.7 |
HIP 10590 |
22.53 |
| 2026-10-03 12:00 |
02:18:03.54 |
+30:58:05.1 |
HIP 10590 |
22.19 |
| 2026-10-04 00:00 |
02:18:01.90 |
+30:58:01.4 |
HIP 10590 |
21.86 |
| 2026-10-04 12:00 |
02:18:00.25 |
+30:57:57.6 |
HIP 10590 |
21.53 |
| 2026-10-05 00:00 |
02:17:58.59 |
+30:57:53.7 |
HIP 10590 |
21.20 |
| 2026-10-05 12:00 |
02:17:56.93 |
+30:57:49.7 |
HIP 10590 |
20.87 |
| 2026-10-06 00:00 |
02:17:55.25 |
+30:57:45.7 |
HIP 10590 |
20.53 |
| 2026-10-06 12:00 |
02:17:53.58 |
+30:57:41.5 |
HIP 10590 |
20.20 |
| 2026-10-07 00:00 |
02:17:51.89 |
+30:57:37.3 |
HIP 10590 |
19.87 |
| 2026-10-07 12:00 |
02:17:50.20 |
+30:57:33.0 |
HIP 10590 |
19.54 |
| 2026-10-08 00:00 |
02:17:48.50 |
+30:57:28.6 |
HIP 10590 |
19.21 |
| 2026-10-08 12:00 |
02:17:46.80 |
+30:57:24.1 |
HIP 10590 |
18.87 |
| 2026-10-09 00:00 |
02:17:45.09 |
+30:57:19.5 |
HIP 10590 |
18.54 |
| 2026-10-09 12:00 |
02:17:43.38 |
+30:57:14.9 |
HIP 10590 |
18.22 |
| 2026-10-10 00:00 |
02:17:41.65 |
+30:57:10.1 |
HIP 10590 |
17.89 |
| 2026-10-10 12:00 |
02:17:39.93 |
+30:57:05.3 |
HIP 10590 |
17.56 |
| 2026-10-11 00:00 |
02:17:38.20 |
+30:57:00.4 |
HIP 10590 |
17.24 |