메타데이터
| 항목 |
값 |
| Designation |
C/2008 J1 (Boattini) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-07-13T06:16:45.272640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:19Z |
| Obs used |
1557 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-08-03.0000000 |
| e |
0.98961635 |
| q (au) |
1.724294 |
| a (au) |
166.058556 |
| i (deg) |
61.780021 |
| Ω (om, deg) |
273.419698 |
| ω (w, deg) |
68.122712 |
| M (ma, deg) |
0.009552 |
밝기
산란 + 전체 선형
$$
M_a = (10.102 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.102 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.525 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2008-05-02 |
2008-07-13 |
+2.4126 |
-0.690 |
| 2008-07-13 |
2009-04-04 |
+6.1030 |
-2.669 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
07:25:42.26 |
-15:57:47.7 |
HIP 36121 |
15.74 |
| 2026-05-12 12:00 |
07:25:44.05 |
-15:57:27.3 |
HIP 36121 |
15.20 |
| 2026-05-13 00:00 |
07:25:45.87 |
-15:57:07.0 |
HIP 36121 |
14.65 |
| 2026-05-13 12:00 |
07:25:47.70 |
-15:56:46.9 |
HIP 36121 |
14.11 |
| 2026-05-14 00:00 |
07:25:49.57 |
-15:56:26.9 |
HIP 36121 |
13.56 |
| 2026-05-14 12:00 |
07:25:51.45 |
-15:56:07.2 |
HIP 36121 |
13.02 |
| 2026-05-15 00:00 |
07:25:53.36 |
-15:55:47.6 |
HIP 36121 |
12.47 |
| 2026-05-15 12:00 |
07:25:55.29 |
-15:55:28.3 |
HIP 36121 |
11.93 |
| 2026-05-16 00:00 |
07:25:57.24 |
-15:55:09.1 |
HIP 36121 |
11.39 |
| 2026-05-16 12:00 |
07:25:59.22 |
-15:54:50.1 |
HIP 36121 |
10.85 |
| 2026-05-17 00:00 |
07:26:01.21 |
-15:54:31.3 |
HIP 36121 |
10.31 |
| 2026-05-17 12:00 |
07:26:03.23 |
-15:54:12.8 |
HIP 36121 |
9.77 |
| 2026-05-18 00:00 |
07:26:05.28 |
-15:53:54.4 |
HIP 36121 |
9.24 |
| 2026-05-18 12:00 |
07:26:07.34 |
-15:53:36.2 |
HIP 36121 |
8.72 |
| 2026-05-19 00:00 |
07:26:09.42 |
-15:53:18.2 |
HIP 36121 |
8.20 |
| 2026-05-19 12:00 |
07:26:11.53 |
-15:53:00.4 |
HIP 36121 |
7.70 |
| 2026-05-20 00:00 |
07:26:13.66 |
-15:52:42.8 |
HIP 36121 |
7.21 |
| 2026-05-20 12:00 |
07:26:15.81 |
-15:52:25.4 |
HIP 36121 |
6.73 |
| 2026-05-21 00:00 |
07:26:17.98 |
-15:52:08.2 |
HIP 36121 |
6.28 |
| 2026-05-21 12:00 |
07:26:20.17 |
-15:51:51.2 |
HIP 36121 |
5.85 |
| 2026-05-22 00:00 |
07:26:22.38 |
-15:51:34.4 |
HIP 36121 |
5.46 |
| 2026-05-22 12:00 |
07:26:24.61 |
-15:51:17.9 |
HIP 36121 |
5.11 |
| 2026-05-23 00:00 |
07:26:26.86 |
-15:51:01.5 |
HIP 36121 |
4.82 |
| 2026-05-23 12:00 |
07:26:29.13 |
-15:50:45.4 |
HIP 36121 |
4.59 |
| 2026-05-24 00:00 |
07:26:31.42 |
-15:50:29.4 |
HIP 36121 |
4.44 |
| 2026-05-24 12:00 |
07:26:33.73 |
-15:50:13.7 |
HIP 36121 |
4.38 |
| 2026-05-25 00:00 |
07:26:36.06 |
-15:49:58.2 |
HIP 36121 |
4.41 |
| 2026-05-25 12:00 |
07:26:38.41 |
-15:49:42.8 |
HIP 36121 |
4.52 |
| 2026-05-26 00:00 |
07:26:40.78 |
-15:49:27.7 |
HIP 36121 |
4.73 |
| 2026-05-26 12:00 |
07:26:43.16 |
-15:49:12.9 |
HIP 36121 |
5.01 |
| 2026-05-27 00:00 |
07:26:45.57 |
-15:48:58.2 |
HIP 36121 |
5.35 |
| 2026-05-27 12:00 |
07:26:47.99 |
-15:48:43.7 |
HIP 36121 |
5.75 |
| 2026-05-28 00:00 |
07:26:50.43 |
-15:48:29.5 |
HIP 36121 |
6.19 |
| 2026-05-28 12:00 |
07:26:52.89 |
-15:48:15.5 |
HIP 36121 |
6.67 |
| 2026-05-29 00:00 |
07:26:55.37 |
-15:48:01.7 |
HIP 36121 |
7.17 |
| 2026-05-29 12:00 |
07:26:57.87 |
-15:47:48.1 |
HIP 36121 |
7.71 |
| 2026-05-30 00:00 |
07:27:00.38 |
-15:47:34.7 |
HIP 36121 |
8.26 |
| 2026-05-30 12:00 |
07:27:02.91 |
-15:47:21.6 |
HIP 36121 |
8.83 |
| 2026-05-31 00:00 |
07:27:05.46 |
-15:47:08.7 |
HIP 36121 |
9.41 |
| 2026-05-31 12:00 |
07:27:08.03 |
-15:46:56.0 |
HIP 36121 |
10.01 |
| 2026-06-01 00:00 |
07:27:10.61 |
-15:46:43.5 |
HIP 36121 |
10.62 |
| 2026-06-01 12:00 |
07:27:13.21 |
-15:46:31.2 |
HIP 36121 |
11.23 |
| 2026-06-02 00:00 |
07:27:15.83 |
-15:46:19.2 |
HIP 36121 |
11.86 |