메타데이터
| 항목 |
값 |
| Designation |
C/2012 B3 (La Sagra) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-12-06T20:01:59.358720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:00Z |
| Obs used |
295 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-04-01.0000000 |
| e |
1.00118336 |
| q (au) |
3.536536 |
| a (au) |
-2988.542542 |
| i (deg) |
106.932915 |
| Ω (om, deg) |
252.999494 |
| ω (w, deg) |
50.733261 |
| M (ma, deg) |
0.000701 |
밝기
산란 + 전체 선형
$$
M_a = (16.434 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.434 |
| 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 |
04:44:52.54 |
+11:57:19.3 |
HIP 22157 |
22.60 |
| 2026-07-29 12:00 |
04:44:54.73 |
+11:57:10.4 |
HIP 22157 |
22.11 |
| 2026-07-30 00:00 |
04:44:56.88 |
+11:57:01.4 |
HIP 22157 |
21.62 |
| 2026-07-30 12:00 |
04:44:59.01 |
+11:56:52.2 |
HIP 22157 |
21.13 |
| 2026-07-31 00:00 |
04:45:01.11 |
+11:56:43.0 |
HIP 22157 |
20.65 |
| 2026-07-31 12:00 |
04:45:03.19 |
+11:56:33.7 |
HIP 22157 |
20.18 |
| 2026-08-01 00:00 |
04:45:05.25 |
+11:56:24.3 |
HIP 22157 |
19.72 |
| 2026-08-01 12:00 |
04:45:07.27 |
+11:56:14.7 |
HIP 22157 |
19.26 |
| 2026-08-02 00:00 |
04:45:09.28 |
+11:56:05.1 |
HIP 22157 |
18.80 |
| 2026-08-02 12:00 |
04:45:11.25 |
+11:55:55.4 |
HIP 22157 |
18.36 |
| 2026-08-03 00:00 |
04:45:13.20 |
+11:55:45.5 |
HIP 22157 |
17.92 |
| 2026-08-03 12:00 |
04:45:15.12 |
+11:55:35.6 |
HIP 22157 |
17.48 |
| 2026-08-04 00:00 |
04:45:17.02 |
+11:55:25.5 |
HIP 22157 |
17.05 |
| 2026-08-04 12:00 |
04:45:18.89 |
+11:55:15.4 |
HIP 22157 |
16.63 |
| 2026-08-05 00:00 |
04:45:20.73 |
+11:55:05.2 |
HIP 22157 |
16.22 |
| 2026-08-05 12:00 |
04:45:22.55 |
+11:54:54.8 |
HIP 22157 |
15.81 |
| 2026-08-06 00:00 |
04:45:24.33 |
+11:54:44.4 |
HIP 22157 |
15.41 |
| 2026-08-06 12:00 |
04:45:26.09 |
+11:54:33.9 |
HIP 22157 |
15.01 |
| 2026-08-07 00:00 |
04:45:27.83 |
+11:54:23.2 |
HIP 22157 |
14.63 |
| 2026-08-07 12:00 |
04:45:29.53 |
+11:54:12.5 |
HIP 22157 |
14.24 |
| 2026-08-08 00:00 |
04:45:31.21 |
+11:54:01.7 |
HIP 22157 |
13.87 |
| 2026-08-08 12:00 |
04:45:32.86 |
+11:53:50.7 |
HIP 22157 |
13.50 |
| 2026-08-09 00:00 |
04:45:34.48 |
+11:53:39.7 |
HIP 22157 |
13.14 |
| 2026-08-09 12:00 |
04:45:36.07 |
+11:53:28.6 |
HIP 22157 |
12.78 |
| 2026-08-10 00:00 |
04:45:37.63 |
+11:53:17.3 |
HIP 22157 |
12.44 |
| 2026-08-10 12:00 |
04:45:39.17 |
+11:53:06.0 |
HIP 22157 |
12.09 |
| 2026-08-11 00:00 |
04:45:40.68 |
+11:52:54.6 |
HIP 22157 |
11.76 |
| 2026-08-11 12:00 |
04:45:42.15 |
+11:52:43.1 |
HIP 22157 |
11.43 |
| 2026-08-12 00:00 |
04:45:43.60 |
+11:52:31.5 |
HIP 22157 |
11.11 |
| 2026-08-12 12:00 |
04:45:45.02 |
+11:52:19.8 |
HIP 22157 |
10.79 |
| 2026-08-13 00:00 |
04:45:46.41 |
+11:52:07.9 |
HIP 22157 |
10.49 |
| 2026-08-13 12:00 |
04:45:47.77 |
+11:51:56.0 |
HIP 22157 |
10.19 |
| 2026-08-14 00:00 |
04:45:49.10 |
+11:51:44.1 |
HIP 22157 |
9.89 |
| 2026-08-14 12:00 |
04:45:50.40 |
+11:51:32.0 |
HIP 22157 |
9.60 |
| 2026-08-15 00:00 |
04:45:51.67 |
+11:51:19.8 |
HIP 22157 |
9.32 |
| 2026-08-15 12:00 |
04:45:52.91 |
+11:51:07.5 |
HIP 22157 |
9.05 |
| 2026-08-16 00:00 |
04:45:54.11 |
+11:50:55.2 |
HIP 22157 |
8.78 |
| 2026-08-16 12:00 |
04:45:55.29 |
+11:50:42.7 |
HIP 22157 |
8.52 |
| 2026-08-17 00:00 |
04:45:56.44 |
+11:50:30.2 |
HIP 22157 |
8.27 |
| 2026-08-17 12:00 |
04:45:57.56 |
+11:50:17.5 |
HIP 22157 |
8.02 |
| 2026-08-18 00:00 |
04:45:58.65 |
+11:50:04.8 |
HIP 22157 |
7.78 |
| 2026-08-18 12:00 |
04:45:59.70 |
+11:49:52.0 |
HIP 22157 |
7.55 |
| 2026-08-19 00:00 |
04:46:00.73 |
+11:49:39.1 |
HIP 22157 |
7.32 |