메타데이터
| 항목 |
값 |
| Designation |
C/1998 K5 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-07-17T10:42:32.613120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
627 |
| NEO |
- |
| M1 |
15.300 |
| K1 |
28.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1998-07-27.0000000 |
| e |
0.98669128 |
| q (au) |
0.963547 |
| a (au) |
72.399650 |
| i (deg) |
9.927137 |
| Ω (om, deg) |
211.117668 |
| ω (w, deg) |
99.460270 |
| M (ma, deg) |
0.015285 |
밝기
산란 + 전체 선형
$$
M_a = (15.295 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.295 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.851 |
| k |
0.939 |
| 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 |
| 1998-05-26 |
1998-06-15 |
+45.9853 |
-1.403 |
| 1998-06-15 |
1998-07-16 |
+6.3263 |
+0.583 |
| 1998-07-17 |
1998-09-22 |
-11.0269 |
-0.952 |
| 1998-09-22 |
1998-10-31 |
+26.5628 |
-7.342 |
| 1998-10-31 |
1998-12-19 |
-18.5111 |
+5.933 |
| 1998-12-19 |
1999-02-14 |
-0.4311 |
-1.229 |
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 |
07:43:55.97 |
+11:19:14.4 |
HIP 37852 |
34.99 |
| 2026-05-12 12:00 |
07:43:57.16 |
+11:19:17.1 |
HIP 37852 |
34.75 |
| 2026-05-13 00:00 |
07:43:58.38 |
+11:19:19.7 |
HIP 37852 |
34.52 |
| 2026-05-13 12:00 |
07:43:59.61 |
+11:19:22.3 |
HIP 37852 |
34.28 |
| 2026-05-14 00:00 |
07:44:00.87 |
+11:19:24.8 |
HIP 37852 |
34.04 |
| 2026-05-14 12:00 |
07:44:02.14 |
+11:19:27.2 |
HIP 37852 |
33.81 |
| 2026-05-15 00:00 |
07:44:03.43 |
+11:19:29.5 |
HIP 37852 |
33.57 |
| 2026-05-15 12:00 |
07:44:04.73 |
+11:19:31.8 |
HIP 37852 |
33.33 |
| 2026-05-16 00:00 |
07:44:06.06 |
+11:19:34.0 |
HIP 37852 |
33.09 |
| 2026-05-16 12:00 |
07:44:07.40 |
+11:19:36.1 |
HIP 37852 |
32.85 |
| 2026-05-17 00:00 |
07:44:08.76 |
+11:19:38.1 |
HIP 37852 |
32.60 |
| 2026-05-17 12:00 |
07:44:10.14 |
+11:19:40.1 |
HIP 37852 |
32.36 |
| 2026-05-18 00:00 |
07:44:11.54 |
+11:19:42.0 |
HIP 37852 |
32.12 |
| 2026-05-18 12:00 |
07:44:12.95 |
+11:19:43.8 |
HIP 37852 |
31.88 |
| 2026-05-19 00:00 |
07:44:14.39 |
+11:19:45.5 |
HIP 37852 |
31.64 |
| 2026-05-19 12:00 |
07:44:15.84 |
+11:19:47.1 |
HIP 37852 |
31.40 |
| 2026-05-20 00:00 |
07:44:17.30 |
+11:19:48.7 |
HIP 37852 |
31.16 |
| 2026-05-20 12:00 |
07:44:18.78 |
+11:19:50.2 |
HIP 37852 |
30.92 |
| 2026-05-21 00:00 |
07:44:20.28 |
+11:19:51.6 |
HIP 37852 |
30.69 |
| 2026-05-21 12:00 |
07:44:21.80 |
+11:19:53.0 |
HIP 37852 |
30.45 |
| 2026-05-22 00:00 |
07:44:23.33 |
+11:19:54.2 |
HIP 37852 |
30.22 |
| 2026-05-22 12:00 |
07:44:24.88 |
+11:19:55.4 |
HIP 37852 |
29.98 |
| 2026-05-23 00:00 |
07:44:26.45 |
+11:19:56.5 |
HIP 37852 |
29.75 |
| 2026-05-23 12:00 |
07:44:28.03 |
+11:19:57.5 |
HIP 37852 |
29.52 |
| 2026-05-24 00:00 |
07:44:29.63 |
+11:19:58.5 |
HIP 37852 |
29.30 |
| 2026-05-24 12:00 |
07:44:31.25 |
+11:19:59.3 |
HIP 37852 |
29.07 |
| 2026-05-25 00:00 |
07:44:32.88 |
+11:20:00.1 |
HIP 37852 |
28.85 |
| 2026-05-25 12:00 |
07:44:34.52 |
+11:20:00.9 |
HIP 37852 |
28.63 |
| 2026-05-26 00:00 |
07:44:36.18 |
+11:20:01.5 |
HIP 37852 |
28.42 |
| 2026-05-26 12:00 |
07:44:37.86 |
+11:20:02.1 |
HIP 37852 |
28.21 |
| 2026-05-27 00:00 |
07:44:39.55 |
+11:20:02.5 |
HIP 37852 |
28.00 |
| 2026-05-27 12:00 |
07:44:41.26 |
+11:20:02.9 |
HIP 37852 |
27.79 |
| 2026-05-28 00:00 |
07:44:42.98 |
+11:20:03.3 |
HIP 37852 |
27.59 |
| 2026-05-28 12:00 |
07:44:44.72 |
+11:20:03.5 |
HIP 37852 |
27.40 |
| 2026-05-29 00:00 |
07:44:46.48 |
+11:20:03.7 |
HIP 37852 |
27.21 |
| 2026-05-29 12:00 |
07:44:48.24 |
+11:20:03.8 |
HIP 37852 |
27.02 |
| 2026-05-30 00:00 |
07:44:50.03 |
+11:20:03.8 |
HIP 37852 |
26.84 |
| 2026-05-30 12:00 |
07:44:51.82 |
+11:20:03.8 |
HIP 37852 |
26.67 |
| 2026-05-31 00:00 |
07:44:53.63 |
+11:20:03.6 |
HIP 37852 |
26.50 |
| 2026-05-31 12:00 |
07:44:55.46 |
+11:20:03.4 |
HIP 37852 |
26.34 |
| 2026-06-01 00:00 |
07:44:57.30 |
+11:20:03.1 |
HIP 37852 |
26.19 |
| 2026-06-01 12:00 |
07:44:59.15 |
+11:20:02.8 |
HIP 37852 |
26.04 |
| 2026-06-02 00:00 |
07:45:01.02 |
+11:20:02.3 |
HIP 37852 |
25.90 |