메타데이터
| 항목 |
값 |
| Designation |
C/1978 T3 (Bradfield) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1978-09-29T02:01:57.146880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1978-10-19.0000000 |
| e |
0.99999921 |
| q (au) |
0.431792 |
| a (au) |
547482.576663 |
| i (deg) |
138.267856 |
| Ω (om, deg) |
358.421984 |
| ω (w, deg) |
240.439277 |
| M (ma, deg) |
0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (12.272 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.272 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
20:34:11.51 |
+14:18:50.5 |
HIP 101487 |
24.14 |
| 2026-07-29 12:00 |
20:34:09.89 |
+14:18:45.5 |
HIP 101487 |
24.17 |
| 2026-07-30 00:00 |
20:34:08.27 |
+14:18:40.4 |
HIP 101487 |
24.21 |
| 2026-07-30 12:00 |
20:34:06.65 |
+14:18:35.3 |
HIP 101487 |
24.26 |
| 2026-07-31 00:00 |
20:34:05.03 |
+14:18:30.0 |
HIP 101487 |
24.32 |
| 2026-07-31 12:00 |
20:34:03.41 |
+14:18:24.6 |
HIP 101487 |
24.39 |
| 2026-08-01 00:00 |
20:34:01.79 |
+14:18:19.1 |
HIP 101487 |
24.46 |
| 2026-08-01 12:00 |
20:34:00.17 |
+14:18:13.5 |
HIP 101487 |
24.55 |
| 2026-08-02 00:00 |
20:33:58.55 |
+14:18:07.7 |
HIP 101487 |
24.64 |
| 2026-08-02 12:00 |
20:33:56.93 |
+14:18:01.9 |
HIP 101487 |
24.74 |
| 2026-08-03 00:00 |
20:33:55.31 |
+14:17:56.0 |
HIP 101487 |
24.84 |
| 2026-08-03 12:00 |
20:33:53.70 |
+14:17:49.9 |
HIP 101390 |
24.56 |
| 2026-08-04 00:00 |
20:33:52.08 |
+14:17:43.8 |
HIP 101390 |
24.25 |
| 2026-08-04 12:00 |
20:33:50.47 |
+14:17:37.5 |
HIP 101390 |
23.94 |
| 2026-08-05 00:00 |
20:33:48.85 |
+14:17:31.1 |
HIP 101390 |
23.62 |
| 2026-08-05 12:00 |
20:33:47.24 |
+14:17:24.7 |
HIP 101390 |
23.31 |
| 2026-08-06 00:00 |
20:33:45.63 |
+14:17:18.1 |
HIP 101390 |
23.00 |
| 2026-08-06 12:00 |
20:33:44.03 |
+14:17:11.4 |
HIP 101390 |
22.70 |
| 2026-08-07 00:00 |
20:33:42.42 |
+14:17:04.6 |
HIP 101390 |
22.39 |
| 2026-08-07 12:00 |
20:33:40.82 |
+14:16:57.7 |
HIP 101390 |
22.09 |
| 2026-08-08 00:00 |
20:33:39.21 |
+14:16:50.7 |
HIP 101390 |
21.79 |
| 2026-08-08 12:00 |
20:33:37.61 |
+14:16:43.6 |
HIP 101390 |
21.49 |
| 2026-08-09 00:00 |
20:33:36.02 |
+14:16:36.4 |
HIP 101390 |
21.19 |
| 2026-08-09 12:00 |
20:33:34.42 |
+14:16:29.1 |
HIP 101390 |
20.90 |
| 2026-08-10 00:00 |
20:33:32.83 |
+14:16:21.6 |
HIP 101390 |
20.60 |
| 2026-08-10 12:00 |
20:33:31.24 |
+14:16:14.1 |
HIP 101390 |
20.31 |
| 2026-08-11 00:00 |
20:33:29.65 |
+14:16:06.5 |
HIP 101390 |
20.03 |
| 2026-08-11 12:00 |
20:33:28.07 |
+14:15:58.8 |
HIP 101390 |
19.74 |
| 2026-08-12 00:00 |
20:33:26.49 |
+14:15:51.0 |
HIP 101390 |
19.46 |
| 2026-08-12 12:00 |
20:33:24.91 |
+14:15:43.0 |
HIP 101390 |
19.19 |
| 2026-08-13 00:00 |
20:33:23.33 |
+14:15:35.0 |
HIP 101390 |
18.91 |
| 2026-08-13 12:00 |
20:33:21.76 |
+14:15:26.9 |
HIP 101390 |
18.64 |
| 2026-08-14 00:00 |
20:33:20.19 |
+14:15:18.7 |
HIP 101390 |
18.38 |
| 2026-08-14 12:00 |
20:33:18.63 |
+14:15:10.4 |
HIP 101390 |
18.11 |
| 2026-08-15 00:00 |
20:33:17.07 |
+14:15:01.9 |
HIP 101390 |
17.86 |
| 2026-08-15 12:00 |
20:33:15.51 |
+14:14:53.4 |
HIP 101390 |
17.60 |
| 2026-08-16 00:00 |
20:33:13.96 |
+14:14:44.8 |
HIP 101390 |
17.35 |
| 2026-08-16 12:00 |
20:33:12.41 |
+14:14:36.1 |
HIP 101390 |
17.11 |
| 2026-08-17 00:00 |
20:33:10.87 |
+14:14:27.3 |
HIP 101305 |
16.85 |
| 2026-08-17 12:00 |
20:33:09.33 |
+14:14:18.5 |
HIP 101305 |
16.50 |
| 2026-08-18 00:00 |
20:33:07.79 |
+14:14:09.5 |
HIP 101305 |
16.15 |
| 2026-08-18 12:00 |
20:33:06.26 |
+14:14:00.4 |
HIP 101305 |
15.81 |
| 2026-08-19 00:00 |
20:33:04.74 |
+14:13:51.3 |
HIP 101305 |
15.47 |