메타데이터
| 항목 |
값 |
| Designation |
C/1992 J2 (Bradfield) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-05-25T19:03:09.063360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:43Z |
| Obs used |
13 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1992-05-19.0000000 |
| e |
1.00000000 |
| q (au) |
0.592320 |
| a (au) |
- |
| i (deg) |
158.564625 |
| Ω (om, deg) |
160.008049 |
| ω (w, deg) |
299.721515 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (11.892 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.892 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
02:48:14.58 |
+37:09:32.1 |
HIP 13176 |
17.56 |
| 2026-06-01 12:00 |
02:48:16.66 |
+37:09:43.7 |
HIP 13176 |
17.11 |
| 2026-06-02 00:00 |
02:48:18.74 |
+37:09:55.4 |
HIP 13176 |
16.66 |
| 2026-06-02 12:00 |
02:48:20.81 |
+37:10:07.2 |
HIP 13176 |
16.21 |
| 2026-06-03 00:00 |
02:48:22.87 |
+37:10:19.0 |
HIP 13176 |
15.76 |
| 2026-06-03 12:00 |
02:48:24.92 |
+37:10:30.8 |
HIP 13176 |
15.32 |
| 2026-06-04 00:00 |
02:48:26.96 |
+37:10:42.7 |
HIP 13176 |
14.87 |
| 2026-06-04 12:00 |
02:48:28.99 |
+37:10:54.6 |
HIP 13176 |
14.43 |
| 2026-06-05 00:00 |
02:48:31.01 |
+37:11:06.6 |
HIP 13176 |
13.99 |
| 2026-06-05 12:00 |
02:48:33.02 |
+37:11:18.6 |
HIP 13176 |
13.55 |
| 2026-06-06 00:00 |
02:48:35.03 |
+37:11:30.7 |
HIP 13176 |
13.11 |
| 2026-06-06 12:00 |
02:48:37.02 |
+37:11:42.8 |
HIP 13176 |
12.67 |
| 2026-06-07 00:00 |
02:48:39.00 |
+37:11:54.9 |
HIP 13176 |
12.24 |
| 2026-06-07 12:00 |
02:48:40.98 |
+37:12:07.1 |
HIP 13176 |
11.80 |
| 2026-06-08 00:00 |
02:48:42.94 |
+37:12:19.3 |
HIP 13176 |
11.37 |
| 2026-06-08 12:00 |
02:48:44.89 |
+37:12:31.6 |
HIP 13176 |
10.94 |
| 2026-06-09 00:00 |
02:48:46.84 |
+37:12:43.9 |
HIP 13176 |
10.52 |
| 2026-06-09 12:00 |
02:48:48.77 |
+37:12:56.2 |
HIP 13176 |
10.09 |
| 2026-06-10 00:00 |
02:48:50.69 |
+37:13:08.6 |
HIP 13176 |
9.67 |
| 2026-06-10 12:00 |
02:48:52.60 |
+37:13:21.0 |
HIP 13176 |
9.25 |
| 2026-06-11 00:00 |
02:48:54.50 |
+37:13:33.5 |
HIP 13176 |
8.83 |
| 2026-06-11 12:00 |
02:48:56.39 |
+37:13:45.9 |
HIP 13176 |
8.41 |
| 2026-06-12 00:00 |
02:48:58.27 |
+37:13:58.4 |
HIP 13176 |
8.00 |
| 2026-06-12 12:00 |
02:49:00.14 |
+37:14:11.0 |
HIP 13176 |
7.59 |
| 2026-06-13 00:00 |
02:49:01.99 |
+37:14:23.5 |
HIP 13176 |
7.18 |
| 2026-06-13 12:00 |
02:49:03.83 |
+37:14:36.1 |
HIP 13176 |
6.78 |
| 2026-06-14 00:00 |
02:49:05.66 |
+37:14:48.8 |
HIP 13176 |
6.38 |
| 2026-06-14 12:00 |
02:49:07.48 |
+37:15:01.4 |
HIP 13176 |
5.98 |
| 2026-06-15 00:00 |
02:49:09.29 |
+37:15:14.1 |
HIP 13176 |
5.59 |
| 2026-06-15 12:00 |
02:49:11.08 |
+37:15:26.8 |
HIP 13176 |
5.20 |
| 2026-06-16 00:00 |
02:49:12.87 |
+37:15:39.5 |
HIP 13176 |
4.82 |
| 2026-06-16 12:00 |
02:49:14.64 |
+37:15:52.3 |
HIP 13176 |
4.45 |
| 2026-06-17 00:00 |
02:49:16.39 |
+37:16:05.1 |
HIP 13176 |
4.08 |
| 2026-06-17 12:00 |
02:49:18.14 |
+37:16:17.9 |
HIP 13176 |
3.72 |
| 2026-06-18 00:00 |
02:49:19.87 |
+37:16:30.7 |
HIP 13176 |
3.38 |
| 2026-06-18 12:00 |
02:49:21.59 |
+37:16:43.6 |
HIP 13176 |
3.05 |
| 2026-06-19 00:00 |
02:49:23.29 |
+37:16:56.4 |
HIP 13176 |
2.74 |
| 2026-06-19 12:00 |
02:49:24.98 |
+37:17:09.3 |
HIP 13176 |
2.46 |
| 2026-06-20 00:00 |
02:49:26.66 |
+37:17:22.2 |
HIP 13176 |
2.22 |
| 2026-06-20 12:00 |
02:49:28.33 |
+37:17:35.1 |
HIP 13176 |
2.02 |
| 2026-06-21 00:00 |
02:49:29.98 |
+37:17:48.1 |
HIP 13176 |
1.88 |
| 2026-06-21 12:00 |
02:49:31.61 |
+37:18:01.0 |
HIP 13176 |
1.82 |
| 2026-06-22 00:00 |
02:49:33.24 |
+37:18:14.0 |
HIP 13176 |
1.84 |