C/2014 Q2 (Lovejoy)
메타데이터
| 항목 |
값 |
| Designation |
C/2014 Q2 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-01-30T01:39:43.441920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:00Z |
| Obs used |
7890 |
| NEO |
- |
| M1 |
9.100 |
| K1 |
6.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-30.0000000 |
| e |
0.99777393 |
| q (au) |
1.290358 |
| a (au) |
579.657050 |
| i (deg) |
80.301299 |
| Ω (om, deg) |
94.975060 |
| ω (w, deg) |
12.395263 |
| M (ma, deg) |
0.004162 |
밝기
산란 + 전체 선형
$$
M_a = (9.196 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.196 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.861 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2014-07-01 |
2015-01-30 |
+10.9317 |
-2.192 |
| 2015-01-30 |
2016-09-10 |
+4.9712 |
-3.135 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:16:40.19 |
-11:06:20.7 |
HIP 89524 |
9.79 |
| 2026-02-03 12:00 |
18:16:43.67 |
-11:06:14.0 |
HIP 89524 |
10.60 |
| 2026-02-04 00:00 |
18:16:47.14 |
-11:06:07.3 |
HIP 89524 |
11.42 |
| 2026-02-04 12:00 |
18:16:50.57 |
-11:06:00.5 |
HIP 89524 |
12.24 |
| 2026-02-05 00:00 |
18:16:53.98 |
-11:05:53.6 |
HIP 89524 |
13.06 |
| 2026-02-05 12:00 |
18:16:57.37 |
-11:05:46.6 |
HIP 89524 |
13.87 |
| 2026-02-06 00:00 |
18:17:00.73 |
-11:05:39.6 |
HIP 89524 |
14.68 |
| 2026-02-06 12:00 |
18:17:04.06 |
-11:05:32.4 |
HIP 89524 |
15.49 |
| 2026-02-07 00:00 |
18:17:07.37 |
-11:05:25.2 |
HIP 89524 |
16.30 |
| 2026-02-07 12:00 |
18:17:10.66 |
-11:05:17.9 |
HIP 89524 |
17.10 |
| 2026-02-08 00:00 |
18:17:13.91 |
-11:05:10.5 |
HIP 89524 |
17.89 |
| 2026-02-08 12:00 |
18:17:17.14 |
-11:05:03.0 |
HIP 89524 |
18.69 |
| 2026-02-09 00:00 |
18:17:20.34 |
-11:04:55.4 |
HIP 89524 |
19.47 |
| 2026-02-09 12:00 |
18:17:23.52 |
-11:04:47.8 |
HIP 89524 |
20.25 |
| 2026-02-10 00:00 |
18:17:26.67 |
-11:04:40.1 |
HIP 89524 |
21.03 |
| 2026-02-10 12:00 |
18:17:29.79 |
-11:04:32.3 |
HIP 89524 |
21.80 |
| 2026-02-11 00:00 |
18:17:32.88 |
-11:04:24.4 |
HIP 89524 |
22.57 |
| 2026-02-11 12:00 |
18:17:35.94 |
-11:04:16.5 |
HIP 89583 |
23.05 |
| 2026-02-12 00:00 |
18:17:38.98 |
-11:04:08.5 |
HIP 89583 |
23.54 |
| 2026-02-12 12:00 |
18:17:41.98 |
-11:04:00.4 |
HIP 89583 |
24.05 |
| 2026-02-13 00:00 |
18:17:44.96 |
-11:03:52.2 |
HIP 89583 |
24.56 |
| 2026-02-13 12:00 |
18:17:47.91 |
-11:03:44.0 |
HIP 89583 |
25.08 |
| 2026-02-14 00:00 |
18:17:50.83 |
-11:03:35.7 |
HIP 89583 |
25.61 |
| 2026-02-14 12:00 |
18:17:53.72 |
-11:03:27.3 |
HIP 89583 |
26.14 |
| 2026-02-15 00:00 |
18:17:56.58 |
-11:03:18.9 |
HIP 89800 |
25.75 |
| 2026-02-15 12:00 |
18:17:59.41 |
-11:03:10.4 |
HIP 89800 |
25.04 |
| 2026-02-16 00:00 |
18:18:02.21 |
-11:03:01.8 |
HIP 89800 |
24.34 |
| 2026-02-16 12:00 |
18:18:04.98 |
-11:02:53.2 |
HIP 89800 |
23.65 |
| 2026-02-17 00:00 |
18:18:07.71 |
-11:02:44.5 |
HIP 89800 |
22.96 |
| 2026-02-17 12:00 |
18:18:10.42 |
-11:02:35.7 |
HIP 89800 |
22.29 |
| 2026-02-18 00:00 |
18:18:13.10 |
-11:02:26.9 |
HIP 89800 |
21.62 |
| 2026-02-18 12:00 |
18:18:15.74 |
-11:02:18.0 |
HIP 89800 |
20.95 |
| 2026-02-19 00:00 |
18:18:18.35 |
-11:02:09.0 |
HIP 89800 |
20.30 |
| 2026-02-19 12:00 |
18:18:20.93 |
-11:02:00.0 |
HIP 89800 |
19.65 |
| 2026-02-20 00:00 |
18:18:23.48 |
-11:01:51.0 |
HIP 89800 |
19.00 |
| 2026-02-20 12:00 |
18:18:26.00 |
-11:01:41.8 |
HIP 89800 |
18.37 |
| 2026-02-21 00:00 |
18:18:28.48 |
-11:01:32.7 |
HIP 89800 |
17.74 |
| 2026-02-21 12:00 |
18:18:30.94 |
-11:01:23.4 |
HIP 89800 |
17.12 |
| 2026-02-22 00:00 |
18:18:33.36 |
-11:01:14.1 |
HIP 89800 |
16.51 |
| 2026-02-22 12:00 |
18:18:35.74 |
-11:01:04.8 |
HIP 89800 |
15.91 |
| 2026-02-23 00:00 |
18:18:38.09 |
-11:00:55.4 |
HIP 89800 |
15.31 |
| 2026-02-23 12:00 |
18:18:40.41 |
-11:00:46.0 |
HIP 89800 |
14.72 |
| 2026-02-24 00:00 |
18:18:42.70 |
-11:00:36.5 |
HIP 89800 |
14.14 |