메타데이터
| 항목 |
값 |
| Designation |
C/2013 R1 (Lovejoy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-12-22T17:35:41.714880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:40Z |
| Obs used |
3894 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-29.0000000 |
| e |
0.99842519 |
| q (au) |
0.811826 |
| a (au) |
515.505940 |
| i (deg) |
64.040953 |
| Ω (om, deg) |
70.711175 |
| ω (w, deg) |
67.166449 |
| M (ma, deg) |
0.000528 |
밝기
산란 + 전체 선형
$$
M_a = (11.126 + 5.399\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.126 |
| n |
5.399 |
| gf |
1.000 |
| gb |
-0.758 |
| 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 |
| 2013-09-07 |
2013-12-22 |
+3.3697 |
-1.131 |
| 2013-12-22 |
2014-03-14 |
+1.6099 |
-2.730 |
| 2014-03-14 |
2014-09-14 |
+3.9594 |
-2.438 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
19:06:50.90 |
-64:52:34.2 |
HIP 94008 |
19.57 |
| 2026-03-26 12:00 |
19:06:52.97 |
-64:53:15.8 |
HIP 94008 |
18.86 |
| 2026-03-27 00:00 |
19:06:54.96 |
-64:53:57.5 |
HIP 94008 |
18.16 |
| 2026-03-27 12:00 |
19:06:56.87 |
-64:54:39.3 |
HIP 94008 |
17.46 |
| 2026-03-28 00:00 |
19:06:58.70 |
-64:55:21.3 |
HIP 94008 |
16.76 |
| 2026-03-28 12:00 |
19:07:00.45 |
-64:56:03.3 |
HIP 94008 |
16.07 |
| 2026-03-29 00:00 |
19:07:02.12 |
-64:56:45.4 |
HIP 94008 |
15.39 |
| 2026-03-29 12:00 |
19:07:03.71 |
-64:57:27.7 |
HIP 94008 |
14.72 |
| 2026-03-30 00:00 |
19:07:05.22 |
-64:58:10.0 |
HIP 94008 |
14.05 |
| 2026-03-30 12:00 |
19:07:06.65 |
-64:58:52.5 |
HIP 94008 |
13.39 |
| 2026-03-31 00:00 |
19:07:08.00 |
-64:59:35.0 |
HIP 94008 |
12.75 |
| 2026-03-31 12:00 |
19:07:09.27 |
-65:00:17.6 |
HIP 94008 |
12.11 |
| 2026-04-01 00:00 |
19:07:10.46 |
-65:01:00.3 |
HIP 94008 |
11.50 |
| 2026-04-01 12:00 |
19:07:11.57 |
-65:01:43.1 |
HIP 94008 |
10.90 |
| 2026-04-02 00:00 |
19:07:12.59 |
-65:02:26.0 |
HIP 94008 |
10.32 |
| 2026-04-02 12:00 |
19:07:13.54 |
-65:03:08.9 |
HIP 94008 |
9.77 |
| 2026-04-03 00:00 |
19:07:14.40 |
-65:03:51.9 |
HIP 94008 |
9.25 |
| 2026-04-03 12:00 |
19:07:15.19 |
-65:04:35.0 |
HIP 94008 |
8.76 |
| 2026-04-04 00:00 |
19:07:15.89 |
-65:05:18.2 |
HIP 94008 |
8.31 |
| 2026-04-04 12:00 |
19:07:16.50 |
-65:06:01.4 |
HIP 94008 |
7.92 |
| 2026-04-05 00:00 |
19:07:17.04 |
-65:06:44.7 |
HIP 94008 |
7.57 |
| 2026-04-05 12:00 |
19:07:17.50 |
-65:07:28.1 |
HIP 94008 |
7.30 |
| 2026-04-06 00:00 |
19:07:17.87 |
-65:08:11.5 |
HIP 94008 |
7.09 |
| 2026-04-06 12:00 |
19:07:18.16 |
-65:08:55.0 |
HIP 94008 |
6.96 |
| 2026-04-07 00:00 |
19:07:18.36 |
-65:09:38.5 |
HIP 94008 |
6.92 |
| 2026-04-07 12:00 |
19:07:18.49 |
-65:10:22.1 |
HIP 94008 |
6.96 |
| 2026-04-08 00:00 |
19:07:18.53 |
-65:11:05.7 |
HIP 94008 |
7.08 |
| 2026-04-08 12:00 |
19:07:18.48 |
-65:11:49.4 |
HIP 94008 |
7.29 |
| 2026-04-09 00:00 |
19:07:18.36 |
-65:12:33.1 |
HIP 94008 |
7.56 |
| 2026-04-09 12:00 |
19:07:18.15 |
-65:13:16.9 |
HIP 94008 |
7.91 |
| 2026-04-10 00:00 |
19:07:17.86 |
-65:14:00.6 |
HIP 94008 |
8.30 |
| 2026-04-10 12:00 |
19:07:17.48 |
-65:14:44.5 |
HIP 94008 |
8.75 |
| 2026-04-11 00:00 |
19:07:17.02 |
-65:15:28.3 |
HIP 94008 |
9.25 |
| 2026-04-11 12:00 |
19:07:16.48 |
-65:16:12.2 |
HIP 94008 |
9.78 |
| 2026-04-12 00:00 |
19:07:15.85 |
-65:16:56.1 |
HIP 94008 |
10.34 |
| 2026-04-12 12:00 |
19:07:15.14 |
-65:17:40.0 |
HIP 94008 |
10.93 |
| 2026-04-13 00:00 |
19:07:14.34 |
-65:18:23.9 |
HIP 94008 |
11.54 |
| 2026-04-13 12:00 |
19:07:13.46 |
-65:19:07.8 |
HIP 94008 |
12.17 |
| 2026-04-14 00:00 |
19:07:12.49 |
-65:19:51.8 |
HIP 94008 |
12.81 |
| 2026-04-14 12:00 |
19:07:11.44 |
-65:20:35.8 |
HIP 94008 |
13.47 |
| 2026-04-15 00:00 |
19:07:10.31 |
-65:21:19.7 |
HIP 94008 |
14.15 |
| 2026-04-15 12:00 |
19:07:09.09 |
-65:22:03.7 |
HIP 94008 |
14.83 |
| 2026-04-16 00:00 |
19:07:07.79 |
-65:22:47.6 |
HIP 94063 |
14.62 |