메타데이터
| 항목 |
값 |
| Designation |
C/2012 V2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-08-16T12:00:32.616000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:28Z |
| Obs used |
1054 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-03-07.0000000 |
| e |
0.99762394 |
| q (au) |
1.454756 |
| a (au) |
612.254628 |
| i (deg) |
67.184787 |
| Ω (om, deg) |
262.164771 |
| ω (w, deg) |
217.323257 |
| M (ma, deg) |
359.989428 |
밝기
산란 + 전체 선형
$$
M_a = (7.401 + 5.597\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.401 |
| n |
5.597 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.995 |
| 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 |
| 2012-10-30 |
2013-01-20 |
-3.2735 |
+1.646 |
| 2013-01-20 |
2013-03-25 |
-7.5577 |
+3.461 |
| 2013-03-25 |
2013-08-16 |
+13.2993 |
-4.446 |
| 2013-08-17 |
2013-11-06 |
+2.2763 |
-2.713 |
| 2013-11-06 |
2013-12-16 |
-9.8138 |
+1.381 |
| 2013-12-16 |
2014-05-16 |
+7.6762 |
-3.882 |
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 |
17:55:01.72 |
-12:32:26.4 |
HIP 87729 |
28.41 |
| 2026-03-26 12:00 |
17:55:01.38 |
-12:32:11.3 |
HIP 87729 |
28.17 |
| 2026-03-27 00:00 |
17:55:01.01 |
-12:31:56.3 |
HIP 87729 |
27.93 |
| 2026-03-27 12:00 |
17:55:00.60 |
-12:31:41.3 |
HIP 87729 |
27.69 |
| 2026-03-28 00:00 |
17:55:00.15 |
-12:31:26.3 |
HIP 87729 |
27.45 |
| 2026-03-28 12:00 |
17:54:59.67 |
-12:31:11.3 |
HIP 87729 |
27.22 |
| 2026-03-29 00:00 |
17:54:59.15 |
-12:30:56.2 |
HIP 87729 |
26.98 |
| 2026-03-29 12:00 |
17:54:58.59 |
-12:30:41.2 |
HIP 87729 |
26.75 |
| 2026-03-30 00:00 |
17:54:58.00 |
-12:30:26.2 |
HIP 87729 |
26.52 |
| 2026-03-30 12:00 |
17:54:57.37 |
-12:30:11.2 |
HIP 87729 |
26.29 |
| 2026-03-31 00:00 |
17:54:56.71 |
-12:29:56.3 |
HIP 87729 |
26.06 |
| 2026-03-31 12:00 |
17:54:56.01 |
-12:29:41.3 |
HIP 87729 |
25.84 |
| 2026-04-01 00:00 |
17:54:55.28 |
-12:29:26.3 |
HIP 87729 |
25.62 |
| 2026-04-01 12:00 |
17:54:54.51 |
-12:29:11.4 |
HIP 87729 |
25.40 |
| 2026-04-02 00:00 |
17:54:53.70 |
-12:28:56.4 |
HIP 87729 |
25.19 |
| 2026-04-02 12:00 |
17:54:52.86 |
-12:28:41.5 |
HIP 87729 |
24.98 |
| 2026-04-03 00:00 |
17:54:51.98 |
-12:28:26.6 |
HIP 87729 |
24.78 |
| 2026-04-03 12:00 |
17:54:51.07 |
-12:28:11.7 |
HIP 87729 |
24.58 |
| 2026-04-04 00:00 |
17:54:50.12 |
-12:27:56.8 |
HIP 87729 |
24.38 |
| 2026-04-04 12:00 |
17:54:49.14 |
-12:27:41.9 |
HIP 87729 |
24.19 |
| 2026-04-05 00:00 |
17:54:48.12 |
-12:27:27.0 |
HIP 87729 |
24.01 |
| 2026-04-05 12:00 |
17:54:47.07 |
-12:27:12.2 |
HIP 87729 |
23.83 |
| 2026-04-06 00:00 |
17:54:45.98 |
-12:26:57.3 |
HIP 87729 |
23.66 |
| 2026-04-06 12:00 |
17:54:44.85 |
-12:26:42.5 |
HIP 87729 |
23.50 |
| 2026-04-07 00:00 |
17:54:43.69 |
-12:26:27.7 |
HIP 87729 |
23.34 |
| 2026-04-07 12:00 |
17:54:42.50 |
-12:26:13.0 |
HIP 87729 |
23.19 |
| 2026-04-08 00:00 |
17:54:41.27 |
-12:25:58.2 |
HIP 87729 |
23.05 |
| 2026-04-08 12:00 |
17:54:40.01 |
-12:25:43.5 |
HIP 87729 |
22.92 |
| 2026-04-09 00:00 |
17:54:38.71 |
-12:25:28.8 |
HIP 87729 |
22.80 |
| 2026-04-09 12:00 |
17:54:37.37 |
-12:25:14.1 |
HIP 87729 |
22.69 |
| 2026-04-10 00:00 |
17:54:36.01 |
-12:24:59.4 |
HIP 87729 |
22.59 |
| 2026-04-10 12:00 |
17:54:34.60 |
-12:24:44.8 |
HIP 87729 |
22.50 |
| 2026-04-11 00:00 |
17:54:33.17 |
-12:24:30.2 |
HIP 87729 |
22.42 |
| 2026-04-11 12:00 |
17:54:31.69 |
-12:24:15.6 |
HIP 87729 |
22.35 |
| 2026-04-12 00:00 |
17:54:30.19 |
-12:24:01.0 |
HIP 87729 |
22.29 |
| 2026-04-12 12:00 |
17:54:28.65 |
-12:23:46.5 |
HIP 87729 |
22.25 |
| 2026-04-13 00:00 |
17:54:27.07 |
-12:23:32.0 |
HIP 87729 |
22.22 |
| 2026-04-13 12:00 |
17:54:25.47 |
-12:23:17.5 |
HIP 87729 |
22.21 |
| 2026-04-14 00:00 |
17:54:23.83 |
-12:23:03.1 |
HIP 87729 |
22.21 |
| 2026-04-14 12:00 |
17:54:22.15 |
-12:22:48.7 |
HIP 87729 |
22.22 |
| 2026-04-15 00:00 |
17:54:20.44 |
-12:22:34.3 |
HIP 87729 |
22.25 |
| 2026-04-15 12:00 |
17:54:18.70 |
-12:22:20.0 |
HIP 87729 |
22.30 |
| 2026-04-16 00:00 |
17:54:16.92 |
-12:22:05.7 |
HIP 87729 |
22.36 |